EP4617448A1

EP4617448A1 - Roof window comprising a vacuum insulated glass unit and an extension

Info

Publication number: EP4617448A1
Application number: EP24163482.3A
Authority: EP
Inventors: Asbjørn Skyum BLICHFELDT; David Damm MØNSTED; Carsten Thomsen; Martin Schwartz WIIG; Jens Troels Plesner Kristensen; Rasmus Ringsholt Nielsen; Jimmy Skjold Jensen; Claus Hansesgaard; Lars Erdmann; Victor SILBERMANN
Original assignee: VKR Holding AS
Current assignee: VKR Holding AS
Priority date: 2024-03-14
Filing date: 2024-03-14
Publication date: 2025-09-17

Abstract

The present disclosure relates to a roof window (1). The roof window comprises a frame and a vacuum insulated glass unit (3) which is supported by the frame (2). The vacuum insulated glass unit (3) comprises an exterior glass sheet (EGS, 3a, 3d) comprising an exterior major surface (3a2, 3d2). One or more glass sheets (EGS, 3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3) comprises a projecting glass sheet portion (3p1, 3p6) which projects beyond a bottom edge (3a_be, 3b_be, 3d_be, 3d_be) of one or more of other glass sheets (EGS, 3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3) at the bottom (BO) of the roof window (1). An extension (18) is arranged in continuation of the bottom of the exterior glass sheet (3a, 3d, EGS) and extends with an extension distance (DIS2).

Description

The present disclosure relates to a roof window comprising a vacuum insulated glass unit

Background

Building roof windows provides several advantages related to, e.g., inflow of sunlight to the interior of the building. Also it may provide ventilation advantages. It is however desired that the roof window provides good heat insulation in order to, e.g., reduce energy waste. Various roof window solutions have this been developed to obtain this. For example, it is known to provide insulation in the roof window frame in order to increase heat insulation performance. Also, an insulating glass unit comprising multiple gas insulated gaps may be used in order to increase heat insulation performance.
Some patent documents discloses using vacuum insulated glass (VIG) units in a roof window. For example, patent document EP4242396 A1 discloses an exterior VIG unit and a smaller interior glass sheet. Patent document EP1835120 A1 discloses a roof window with an adjustable rabbet and a VIG unit. Patent document WO2020147909 A1 discloses a solution where a VIG unit comprises an overlapping part so that an evacuated gap overlaps an elongated, structural bottom member of a sash.
The present disclosure may provide a solution which obtains advantages in relation to, e.g., reducing carbon footprint, providing an aesthetically appealing solution, and/or providing a more mechanically simple and/or robust roof window. It may additionally provide advantages in relation to product adaptability.

Summary

The present disclosure relates to a roof window for installation in a roof structure of a building. The roof window comprises a frame and a vacuum insulated glass unit supported by the frame.
The vacuum insulated glass unit comprises a first glass sheet and a second glass sheet, wherein an insulating, evacuated gap is placed between the first glass sheet and the second glass sheet.
A plurality of support structures are distributed in the evacuated gap so as to maintain a distance between a first major surface of the first glass sheet facing towards the evacuated gap and a first major surface of the second glass sheet facing towards the evacuated gap. An edge seal encloses the evacuated gap.
The first glass sheet is configured to be placed closer to the exterior of the building than the second glass sheet when the roof window is installed in a building roof structure.
The vacuum insulated glass unit comprises an exterior glass sheet comprising an exterior major surface configured to face towards the exterior of the building.
One or more glass sheets of the vacuum insulated glass unit comprises a projecting glass sheet portion, which projects beyond a bottom edge of one or more of other glass sheets of the vacuum insulated glass unit with a projecting distance at the bottom of the roof window.
This may, e.g., provide a solution where an aesthetically advantageous solution may be obtained, where advantages with relation to water protection is obtained, where carbon footprint may be reduced and/or the like.
In one or more embodiments of the present disclosure, an extension is arranged in continuation of the bottom of the exterior glass sheet and extends with an extension distance, and the extension comprises an exterior surface, which is configured to be visible from the exterior of the building.
The present disclosure provides a solution that enables providing a roof window with good heat insulation performance and enabling providing appealing aesthetic. The extension may, e.g., help to provide a resistant solution while providing an aesthetically appealing solution. The extension may, e.g., allow for providing a shorter (or no) projecting glass sheet portion of the exterior glass sheet at the bottom of the roof window. This may, e.g., reduce the risk of damage on the vacuum insulated glass unit due to, e.g., exterior forces, while providing an aesthetically desirable solution. The extension may additionally allow a mechanical solution for providing roof window design variation and/or function variation.
The solution according to embodiments of the present disclosure may additionally enable providing a reduced carbon foot print and/or water tightening advantages.
In some embodiments of the present disclosure, the extension may be arranged opposite to the bottom edge of the exterior glass sheet. This may provide a good mechanical protection and/or a holding feature for holding the exterior glass sheet in extreme situation.
The extension may allow for a solution where the extension may be allowed to deflect in case of more extreme external forces such as hails, and this may reduce the risk of transferring damaging forces to a projecting glass sheet portion of the glass unit.
In one or more embodiments of the present disclosure, the frame comprises a movable frame and a fixation frame. The movable frame is configured to move, such as pivot, relative to the fixation frame by means of one or more hinges. The vacuum insulated glass unit is attached to the movable frame and is configured to move together with the movable frame. Additionally, the extension overlaps a bottom profile of the fixation frame. In some of these embodiments, the roof window is a roof window of the centre hung type.
This may, e.g., provide enhanced ventilation options since the movable frame can be opened from a closed position to an open position. It may also provide desirable aesthetic advantages and/or advantageous rain water handling.
Roof windows of the centre hung type may, e.g., provide the advantage of enabling rotation of the movable frame so that the exterior surface of the glass unit at least partly faces the building interior during window wash and thereby is more easy to clean from the inside of the building.
In one or more embodiments of the present disclosure, said projecting glass sheet portion is a projecting glass sheet portion of the exterior glass sheet, which projects beyond a bottom edge of the second glass sheet with a first projecting distance. This may, e.g., provide aesthetic advantages as a larger continuous surface of the exterior glass sheet is provided. Moreover, it may provide water tightening advantages and/or protection features, such as protecting, e.g., the edge seal against water.
In one or more embodiments of the present disclosure, the glass sheet adjacent to the exterior glass sheet projects beyond a bottom edge of the exterior glass sheet. This may, e.g., provide robustness advantage as the exterior glass sheet does not project beyond the adjacent glass sheet, and/or it may provide space saving advantages.
In one or more embodiments of the present disclosure, the extension distance is at least 10 mm, such as at least 20 mm, such as at least 50 mm.
In one or more embodiments of the present disclosure, the vacuum insulated glass unit comprises a lamination layer, such as a lamination layer comprising a lamination interlayer and a lamination glass sheet.
The lamination layer provides strength and stiffness to the vacuum insulated glass unit, which may be exposed to the atmospheric pressure of 10 tons/m² and undergoes lateral gravity pull since it is a roof window. Even more so when it snows. Further, the lamination layer can reduce the number of falling parts in case of glass unit breakage and/or extend the time (e.g. during fire) before the unit fails.
In one or more embodiments of the present disclosure, the lamination layer, such as a surface of a lamination glass sheet, comprises a major surface configured to face and/or abut a room of the interior of the building after the roof window has been installed in a roof structure of a building.
In one or more embodiments of the present disclosure, the lamination layer comprises a lamination interlayer and a lamination glass sheet. This may, e.g., provide enhanced safety. The lamination interlayer may overlap the movable frame and be attached thereto. This may help to carry glass sheet fractions if a glass sheet is broken. The further glass sheet may be a lamination glass sheet that may, e.g., provide mechanical protection.
In one or more embodiments of the present disclosure, the lamination interlayer comprises or consist of one or more of the following:

ethylene vinyl acetate (EVA),
polyisobutylene (PIB),
polyacetals such as polyvinyl butyral (PVB),
transparent polyurethane (PU),
thermoplastic polyurethane (TPU),
polyvinyl chloride (PVC),
polyesters,
cyclo olefin polymers (COP),
ionomers and/or an ultraviolet activated adhesives.

In some embodiments, PVB, EVA or TPU may be used for the lamination interlayer.
In one or more embodiments of the present disclosure, the lamination layer comprises a lamination interlayer, wherein the lamination interlayer has a thickness above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm.
The inventors have found that a thicker lamination layer having a thickness above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm may provide a stronger unit than provided by, e.g., a 0.38 mm or 0.4 mm lamination interlayer.
This lamination interlayer thickness may additionally or alternatively be advantageous if it is used for adhering to a thermally tempered glass sheet, due to, e.g., surface unevenness, such as so called roller waves, of the thermally tempered glass sheet
The lamination interlayer with such a thickness may, e.g., also help to reduce rain noise which may be especially relevant in roof windows. Moreover, VIG units have shown signs of being rather loud/ less noise damping within certain frequencies detectable by humans when subjected to rain, such as heavy rain. The lamination interlayer thickness may help to reduce such noise.
In some embodiments, the lamination interlayer has a thickness between 0.5 mm and 4 mm, such as between 0.6 mm and 3 mm, such as between 0.7 mm and 2 mm.
In one or more embodiments of the present disclosure, the extension comprises an extension body, which is supported by, such as carried by, an extension body support.
The extension body comprises said exterior, visible surface configured to face the exterior of the building. In some of these embodiments, the extension body is attached to the extension body support. This may, e.g., provide an aesthetically appealing and strong solution. It may additionally provide a solution where the extension, such as the extension body, may be exchanged.
In other embodiments of the present disclosure, the extension may comprise an extension member provided by a plate/sheet, such as a polymer sheet/plate and/or a metal sheet/plate, e.g., comprising one or more of aluminium, iron or steel. The extension member may here be arranged in continuation of the external glass sheet bottom edge and provides the visible extension surface facing away from the building interior and which is subjected to weather such as rain and sunlight. In this embodiment, an extension body, such as a replaceable body, may be omitted.
A coating, such as a paint or an enamel, may comprise/provide the visible surface of the extension.
In one or more embodiments of the present disclosure, the extension body comprises one or more functional parts.
In one or more embodiments of the present disclosure, the extension body comprises one or more electric circuitries and/or electric components,
and/or the extension body comprises a photovoltaic module and/or a sensor such as a rain sensor.
The functional part may, e.g., provide advantages in relation to, e.g., obtaining recharging a battery of an actuator or the like of the roof window, providing sensor information, such as weather information, such as, e.g., temperature information rain information, air humidity information, air pressure information and/or the like.
In one or more embodiments of the present disclosure, the extension body is replaceably attached at the extension body support. In some of these embodiments, said replacement may be provided by manipulating one or more mechanical fasteners. This may, e.g., provide advantages in relation to a solution in relation to a repairing situation and/or extension body exchange.
In one or more embodiments of the present disclosure, the extension body comprises or is a dummy extension body, such as an extension body configured to resemble the exterior glass sheet and/or the surface characteristics, such as the glossiness, of the exterior surface of the exterior glass sheet. This may, e.g., provide a cost efficient, aesthetically pleasing solution.
This may, e.g., provide that the roof window initially is delivered with a "dummy" extension body. This "dummy" extension body may later, in some embodiments, be replaced/retrofitted by a functional extension body such as comprising a photovoltaic module and/or a sensor, such as a rain sensor.
The extension body, such as the dummy extension body, may, e.g., comprise a glass sheet.
In one or more embodiments of the present disclosure, the extension body support comprises a cladding of the roof window. In some of these embodiments, said cladding is unitary with said extension body support. This may, e.g., provide a mechanically simple and/or space saving solution while obtaining enhanced water tightness at the roof window bottom. The cladding member may comprise a covering part ensuring increased water tightness at the roof window bottom.
In one or more embodiments of the present disclosure, an exterior surface of the extension may be substantially identical to and/or substantially visually identical to the exterior surface of the exterior surface of the first projecting glass sheet portion. This may, e.g., enable providing an aesthetically pleasing solution.
In one or more embodiments of the present disclosure, the extension body may comprise a glass sheet and/or an exterior glass sheet surface. This may, e.g., enable providing an aesthetically pleasing solution.
In one or more embodiments of the present disclosure, the frame comprises a movable frame and a fixation frame, wherein the movable frame is configured to move, such as pivot, relative to the fixation frame by means of one or more hinges. The vacuum insulated glass unit is attached to the movable frame and is configured to move together with the movable frame.
In one or more embodiments of the present disclosure, the extension is supported by the movable frame, such as carried by the movable frame, such as mainly carried by the movable frame.
In one or more embodiments of the present disclosure, the extension is attached to a profile of the movable frame by means of one or more mechanical fasteners, such as by means of attaching an attachment part, such as a bracket, of a member of the extension to the profile. This may provide a stronger and/or more safe solution where the risk of breakage or damage of the first projecting glass sheet portion is reduced.
In some embodiments, the extension may be attached to the profile of the movable frame at a surface of the profile that faces a profile of the fixation frame when the movable frame is in a closed position.
In one or more embodiments of the present disclosure, the extension is supported by, such as attached to, the vacuum insulated glass unit. This may, e.g., provide a solution that may be easy to install and/or space saving.
In one or more embodiments of the present disclosure, the extension is supported by said projecting glass sheet portion, such as a projecting glass sheet portion of the exterior glass sheet, by means of an adhesive. This may, e.g., provide a solution that is partly or fully integrated with the vacuum insulated glass unit.
Additionally or alternatively, it may provide a solution that may be more mechanically simple and/or may provide advantages with regards to water tightening.
In one or more embodiments of the present disclosure, the extension is supported by said projecting glass sheet portion, such as by means of an adhesive, so that the extension is carried by, such as mainly carried by, the projecting glass sheet portion. This may, e.g., provide a solution that is partly or fully integrated with the vacuum insulated glass unit.
Additionally or alternatively, it may provide a solution that may be more mechanically simple and/or may provide advantages with regards to water tightening and/or space saving.
If the extension is mainly, such as fully, carried by the glass unit, it may allow for a more simple and/or easy roof window frame design that is aesthetically pleasing, it may provide a solution where water tightening at the roof window is easier and/or more simple and/or the like.
In one or more embodiments of the present disclosure, said exterior, visible surface of the extension is arranged with a distance of less than 8 mm, such as less than 5 mm, such as less than 2 mm, from a plane comprising the exterior major surface of the exterior glass sheet of the vacuum insulated glass unit.
In one or more embodiments of the present disclosure, said exterior, visible surface of the extension is substantially flush with the exterior surface of the exterior glass sheet, such as at least proximate a bottom edge of the exterior glass sheet. This may reduce or avoid water from being captured at a the transition between the extension and the exterior glass sheet when the roof window is installed in the roof structure
In one or more embodiments of the present disclosure, said exterior, visible surface of the extension is parallel with a plane comprising the exterior surface of the exterior glass sheet.
In one or more embodiments of the present disclosure, the exterior surface of the extension is arranged below a plane comprising the exterior major surface of the exterior glass sheet of the vacuum insulated glass unit, at least proximate a bottom edge of the exterior glass sheet. This may reduce or avoid water from being captured at the transition between the extension and the exterior glass sheet when the roof window is installed in the roof structure. The exterior surface of the extension may hence face a surface of the plane that faces towards the building interior.
In other embodiments, an overlapping part may overlap the surface of the exterior glass sheet and the surface of the extension and hence guide water from the exterior glass sheet to the extension surface and thereby allow the surface of the extension to be placed higher than a plane comprising the surface of the exterior glass sheet, also proximate the exterior glass sheet.
In one or more embodiments of the present disclosure, the frame comprises a movable frame and a fixation frame, wherein the movable frame is configured to move, such as pivot, relative to the fixation frame by means of one or more hinges. The vacuum insulated glass unit is attached to the movable frame and is configured to move together with the movable frame. In some of these embodiments, the roof window is a roof window of the centre hung type.
In one or more embodiments of the present disclosure, the extension is replaceably attached to the frame. In some of these embodiments, said replacement may be provided by manipulating one or more mechanical fasteners. This may, e.g., be advantageous as it may allow for easy repairing and/or change of the visual impression provided by the roof window.
In one or more embodiments of the present disclosure, said first glass sheet is the exterior glass sheet. In some of these embodiments, said first major surface of the first glass sheet is configured to face towards the interior of the building when the roof window is installed in a building roof structure. This may, e.g., provide advantages in relation to, e.g., heat insulation performance.
In one or more embodiments of the present disclosure, the vacuum insulated glass unit comprises an enamel layer, such as an enamel layer, which is substantially opaque to at least visible light. The enamel layer covers, such as is applied to, a surface of a projecting portion of the exterior glass sheet at the roof window bottom. Said covered surface is part of the major surface of the exterior glass sheet configured to face towards the interior of the building when the roof window is installed in a building roof structure. This may provide an aesthetically advantageous solution. The enamel layer may be visible through the first glass sheet from the outside/exterior of the roof window.
In one or more embodiments of the present disclosure, the edge seal is placed between the enamel layer and the second glass sheet. In some of these embodiments, the edge seal abuts the enamel layer and/or the edge seal preferably comprises a solder edge seal, such as a glass solder edge seal or a metal solder edge seal. This may, e.g., provide an aesthetically advantageous solution. Experiments have shown that a solder edge seal material, such as a solder glass edge seal material, may adhere/attach to the enamel and provide a sufficiently strong VIG unit that may withstand thermal expansion of the first and/or second glass sheet.
In one or more embodiments of the present disclosure, the enamel layer covers a major surface of a projecting portion and/or a further part of the exterior glass sheet so as to hide one or more parts of the roof window.
In one or more embodiments of the present disclosure, the enamel layer covers substantially an entire major surface of a projecting glass sheet portion of the exterior glass sheet.
In one or more embodiments of the present disclosure, one or more low-e coatings is/are arranged at a major surface of an adjacent glass sheet facing towards the evacuated insulating gap, preferably at a surface configured to face towards the building exterior when the roof window has been installed. This may, e.g., provide a solution that may provide enhanced insulation features.
In one or more embodiments of the present disclosure, the exterior glass sheet comprises said projecting glass sheet portion, and the projecting glass sheet portion projects beyond a bottom edge of the second glass sheet with a first projecting distance.
In one or more embodiments of the present disclosure, the roof window comprises one or more step supports configured to support the projecting glass sheet portion.
Experiments have shown that the projecting glass sheet portion may tend to be fragile to exterior forces, such as, e.g., hails. The support may help to support and take up forces, such as impact forces. The support may be configured to transfer impact forces to the frame. Hence, e.g., a more resistant solution may be obtained.
This transfer of forces may be provided directly from the first projecting glass sheet portion and to the frame, through the step support. The support may act as a reinforcement/protection of the first projecting glass sheet portion.
In one or more embodiments of the present disclosure, the one or more step supports may be attached to the frame, such as by means of a connection member, such as a bracket.
In one or more embodiments of the present disclosure, one or more of the one or more step supports is/are attached to a bottom profile of the movable frame. This may, e.g., provide a stronger and/or more safe solution. Here, the movable frame may provide the supporting of the first projecting glass sheet portion, and forces, such as impact forces from for example hails or other objects, acting on the first projecting glass sheet portion may be transferred to the frame, such as the bottom profile of the movable frame, directly and not through other parts of the glass unit.
In one or more embodiments of the present disclosure, one or more of the one or more step supports comprises a body part which extends to, and/or is placed opposite to, a position opposite a surface of a bottom profile of the fixation frame facing the first projecting glass sheet portion. This may, e.g., provide a more safe solution.
In one or more embodiments of the present disclosure, one or more of the one or more supports is placed between the projecting glass sheet portion and a surface of one or more bottom profiles facing the first projecting glass sheet portion.
In one or more embodiments of the present disclosure, the one or more step supports support the first projecting glass sheet portion at one or more locations. These locations are arranged with a distance of at least 10%, such as at least 40%, such as at least 60% of the first projecting distance from the bottom edge of the second glass sheet.
In one or more embodiments of the present disclosure, one or more of the one or more step supports may be configured to support the first projecting glass sheet portion at least when the movable frame is in a closed position.
In one or more embodiments of the present disclosure, one or more of the one or more step supports is attached to the first projecting glass sheet portion, such as by means of one or more an adhesives. This may, e.g., provide a safe solution as the support may hence both support the glass sheet so as to reduce the risk of breakage of the first projecting glass sheet portion, and moreover may retain the broken parts of the first projecting glass sheet portion in case it breaks.
In one or more embodiments of the present disclosure, one or more of the one or more step supports comprises resilient support elevations, such as comprising discretely arranged support elevations and/or one or more adhesives. This may reduce the risk of breakage of the first projecting glass sheet portion.
In some embodiments, the resilient support elevations may be provided by means of a glue and/or tape.
In one or more embodiments of the present disclosure, the projecting distance is at least 6 mm, such as at least 25 mm, such as at least 45 mm.
In one or more embodiments of the present disclosure, the projecting distance is no more than 60 mm, such as no more than 30 mm, such as no more than 25 mm.
Tests have indicated that the first projecting glass sheet portion (with a 4 mm thermally tempered, exterior glass sheet and the exterior glass sheet being the first glass sheet) may become more fragile if it projects more than 25 mm or more than 30 mm.
Experiments have shown that without a force transferring solution that take up/transfer impact forces, and if the projecting distance of the first projecting glass sheet portion is longer/larger than 30 mm, there may be an increased risk of breakage if subjected to, e.g., hails. This was tested in a hail testing machine simulating hails.
Assuring that the projecting distance of the first projecting glass sheet portion is no more than 30 mm, such as no more than 25 mm may provide a stronger solution where the risk of breakage is reduced without the need of providing a step support or other resilient measures for countering damages from impacts.
If however a step support and/or other measures, such as a resilient force transferring protection member is provided, the first projecting distance may be increased/longer than 40 mm, such as 45 mm or above.
In one or more embodiments of the present disclosure, the movable frame comprises a first structural bottom profile, and the fixation frame comprises a further structural bottom profile. The exterior glass sheet partly or fully overlaps the full width of the first structural bottom profile. In some of these embodiments, the projecting glass sheet portion partly or fully overlaps the width of the further structural bottom profile. This may, e.g., help to provide water tightening advantages and/or enable providing an aesthetical appealing solution.
In one or more embodiments of the present disclosure, the second glass sheet comprises said projecting glass sheet portion.
In one or more embodiments of the present disclosure, the extension comprises an extension member provided by a plate/sheet, such as a polymer sheet/plate and/or a metal sheet/plate. The extension member comprises the visible extension surface facing away from the building interior and which is subjected to weather, such as rain and sunlight when the roof window is installed in the building roof structure. In this embodiment, an extension body, such as a replaceable body, supported by an extension body support, may be omitted.
In one or more embodiments of the present disclosure, the extension member is structural so as to provide or support the structural integrity of the extension.
In one or more embodiments of the present disclosure, the extension member comprises a coating, such as a paint or enamel, wherein said coating comprises the visible extension surface.
In one or more embodiments of the present disclosure, the extension comprises an elongated, structural profile, such as a metal profile, providing the structural integrity of the extension.
In one or more embodiments of the present disclosure, the elongated, structural profile comprises a metal sheet having a thickness between 0.5 mm and 2 mm, such as between 0.5 mm and 1.3 mm, such as between 0.7 mm and 1.0 mm.
In one or more embodiments of the present disclosure, the extension, such as the extension body or the extension member, comprises an enamel layer, such as an enamel layer, which is substantially opaque to at least visible light.
In one or more embodiments of the present disclosure, the enamel layer is placed between the extension body and an extension body support.
In one or more embodiments of the present disclosure, the thickness of the extension body is lower/smaller than the thickness of the exterior glass sheet. In some of these embodiments, the extension body has a thickness that is at least 10% lower, such as at least 25% lower or at least 40% lower than the thickness of the exterior glass sheet. This may, e.g., help to provide a more adaptable solution providing a desirable aesthetical impression. Additionally or alternatively it may help to reduce carbon foot print while providing an aesthetically desirable solution, for example if the extension body comprises or substantially consist of, a glass body (which in some embodiments also may comprise an opaque enamel layer).
In other embodiments, the extension body may have a thickness that is identical to the thickness of the exterior glass sheet or larger than the thickness of the exterior glass sheet.
In one or more embodiments of the present disclosure, the extension, such as a profile, comprises a mechanical holding member, such as comprising a holding wall, which is configured to secure the exterior glass sheet at the bottom thereof. This may provide mechanical protection and/or a holding feature for mechanically holding the exterior glass sheet in extreme or unexpected situations.
In one or more embodiments of the present disclosure, the mechanical holding member comprises a wall placed opposite to, such as next to, the bottom edge of the exterior glass sheet.
In one or more embodiments of the present disclosure, the mechanical holding member comprises a hook part extending to a position opposite to the exterior major surface of the exterior glass sheet, and the hook part is configured to secure the exterior glass sheet at the frame. The hook part may, e.g., provide securing in situation where wind or other forces provided a dragging in the vacuum insulated glass unit in a direction away from the exterior surface of the vacuum insulated glass unit which faces the exterior of the building.
In one or more embodiments of the present disclosure, the bottom edge of the exterior glass sheet is placed at a first side of a holding wall of the mechanical holding member, and the extension body is placed at the opposite side of the holding wall. This may, e.g., provide an aesthetically appealing and/or more resistant solution.
In one or more embodiments of the present disclosure, the vacuum insulated glass unit comprises a third glass sheet, and a further insulating gap is placed between a first major surface of the third glass sheet facing the further insulating gap and a major surface of a glass sheet of the vacuum insulated glass unit, which faces the further insulating gap. This may, e.g., provide a vacuum insulated glass unit with improved heat insulation performance when compared to a vacuum insulating glass unit comprising just one insulating gap being the evacuated gap.
In one or more embodiments of the present disclosure, said major surface of the glass sheet of the vacuum insulated glass unit, which faces the further insulating gap, is a second major surface of the second glass sheet, which faces away from the evacuated gap. The second glass sheet is hence placed between the evacuated gap and the further insulating gap. Major, oppositely directed surfaces of the second glass sheet may thus face, such as abut, the further insulating gap and the evacuated gap, respectively.
In one or more embodiments of the present disclosure, said further insulating gap is placed between the lamination layer and the evacuated gap. Hence, the evacuated gap may be the outermost insulating gap of the vacuum insulated glass unit that is configured to be the insulating gap arranged proximate the exterior of the building.
In one or more embodiments of the present disclosure, the further insulating gap is the insulating gap of the insulating gaps of the vacuum insulated, which is configured to be placed proximate the exterior of the building,
and/or said evacuated gap is placed between the further insulating gap and the lamination layer. Hence, the further insulating gap may be the outermost insulating gap of the vacuum insulated glass unit that is configured to be the insulating gap arranged proximate the exterior of the building.
In one or more embodiments of the present disclosure, the further insulating gap is a gas filled gap, such as a gap comprising argon gas. This may, e.g., provide insulating advantages and/or other advantages provided by each of these insulating gap types, i.e. the gas filled insulating gap type and the evacuated gap type. Additionally or alternatively, it may reduce drawbacks caused by, e.g., the edge seal, such as a solder material edge seal, enclosing the evacuated gap. The edge seal enclosing the evacuated gap may be rigid and hence provide stress conditions when the vacuum insulated glass unit is subjected to thermal expansion due to temperature differences between the exterior surfaces of the vacuum insulating glass unit. Additionally or alternatively, the solder edge seal may provide a thermal bridge. The gas filled insulating gap and/or an edge seal enclosing the further insulating gap, may reduce drawbacks caused by, e.g., the edge seal, such as a solder material edge seal, enclosing the evacuated gap.
In one or more embodiments of the present disclosure, the cladding comprises a covering part, which covers a bottom part of the roof window, and the covering part extends to a position opposite a bottom part of the fixation frame. In some of these embodiments, the covering part extends in a direction away from a plane comprising a major surface of a glass sheet of the vacuum insulated glass unit, to a position opposite the exterior of the frame, such as the exterior of a fixation frame.
In one or more embodiments of the present disclosure, the first and second glass sheets are tempered glass sheets, such as thermally tempered glass sheets.
In some embodiments of the present disclosure, the exterior glass sheet may be a tempered glass sheet such as thermally tempered glass sheets.
In another aspect of the present disclosure, it relates to a building comprising a roof window as described above installed in a roof structure of the building.
In one or more embodiments of the present disclosure, both the first major surface of the first glass sheet and the first major surface of the second glass sheet may cover the full width of the edge seal.
The projection distances described above according to various embodiments of the present disclosure may represent a projection length. The extension distance described above according to various embodiments of the present disclosure may represent an extension length.

Description of the figures

The present disclosure will in the following be described in greater detail with reference to the accompanying drawings:

Fig. 1: illustrates schematically a roof window comprising a first projecting glass sheet portion, according to one or more embodiments of the present disclosure
Fig. 2a-2b: illustrates schematically a roof window in a closed state and an open state, respectively, according to one or more embodiments of the present disclosure,
Fig. 3: illustrates schematically a roof window installed in a building roof structure according to one or more embodiments of the present disclosure,
Fig. 4: illustrates schematically an embodiment of the present disclosure where a glass sheet projects beyond a lamination layer, according to one or more embodiments of the present disclosure,
Fig. 5: illustrates schematically a roof window comprising a gripping member, according to one or more embodiments of the present disclosure,
Fig. 6: illustrates schematically a protection sealing that covers an edge seal, according to one or more embodiments of the present disclosure,
Fig. 7: illustrates schematically an enamel covering a projecting glass sheet, according to one or more embodiments of the present disclosure,
Fig. 8: illustrates schematically a vacuum insulated glass unit comprising a low-e coating, according to one or more embodiments of the present disclosure,
Figs. 9-12: illustrates schematically various embodiments of a roof window comprising one or more supports configured to support a projecting glass sheet portion, according various embodiments of the present disclosure,
Figs. 13-17: illustrates schematically various embodiments of a roof window comprising an extension, according to various embodiments of the present disclosure,
Fig. 18: illustrates schematically an exterior glass sheet comprising projecting portions at a side of the roof window, according to one or more embodiments of the present disclosure,
Fig. 19: illustrates schematically a projecting glass sheet portion which projects beyond an edge of an exterior glass sheet at the top of a roof window, according to one or more embodiments of the present disclosure,
Fig. 20: illustrates schematically a protection sealing (between surfaces of glass sheets, according to one or more embodiments of the present disclosure,
Fig. 21: illustrates schematically an exterior surface of a vacuum insulated glass unit which is arranged below an exterior flashing plane, according to one or more embodiments of the present disclosure,
Fig. 22: illustrates schematically a vacuum insulated glass unit comprising a further insulating gap, such as a gas filled gap, according to one or more embodiments of the present disclosure,
Figs. 23-23a: illustrates schematically a cladding member comprising a connection part and a covering part, and providing shielding, according to various embodiments of the present disclosure,
Fig. 24: illustrates schematically an extension comprising a mechanical holding member configured to secure an exterior glass sheet, according to one or more embodiments of the present disclosure,
Fig. 25: illustrates schematically an exterior glass sheet comprising a projecting glass sheet portion at the top of a roof window, according to one or more embodiments of the present disclosure,
Fig. 26: illustrates schematically that an evacuated gap overlaps an edge seal enclosing a further insulating gap, according to one or more embodiments of the present disclosure,
Fig. 27: illustrates schematically a vacuum insulated glass unit where a further insulating gap overlaps an edge seal enclosing an evacuated gap, according to one or more embodiments of the present disclosure,
Fig. 28: illustrates schematically a gripping member extending in between glass sheets, according to one or more embodiments of the present disclosure,
Fig. 29: illustrates schematically a roof window comprising a vacuum insulated glass unit that comprises a further insulating gap, where a gripping member extends in between an exterior glass sheet and a major surface of a glass sheet facing away from an evacuated gap, according to one or more embodiments of the present disclosure,
Fig. 30: illustrates schematically a vacuum insulated glass unit comprising a larger, further insulating gap, according to one or more embodiments of the present disclosure,
Fig. 31: illustrates schematically a roof window comprising a vacuum insulated glass unit that comprises a further insulating gap, and an extension,
Fig. 32: illustrates schematically a roof window where a vacuum insulated glass unit comprises a further insulating gap and an exterior glass sheet which is displaced relative to the adjacent glass sheet towards a roof window bottom,
Fig. 33: illustrates schematically a roof window installed in a building roof structure and comprising an extension,
Fig. 34: illustrates schematically a roof window installed in a building roof structure and comprising an extension,
Fig. 35: illustrates schematically a vacuum insulated glass unit for a roof window, according to embodiments of the present disclosure,
Fig. 36: illustrates schematically an embodiment of the present disclosure, wherein a step support comprises a mechanical holding member,
Fig. 37: illustrates schematically a centre hung roof window according to embodiments of the present disclosure,
Fig. 38: illustrates schematically a roof window wherein a step support is attached to a projecting glass sheet portion, according to embodiments of the present disclosure,
Fig. 39: illustrates schematically an embodiment of the present disclosure, wherein a distance with which an exterior glass sheet projects beyond a bottom edge of a second glass sheet is larger than a distance with which another glass sheet projects beyond the bottom edge of the second glass sheet,
Figs. 40-42: illustrates various embodiments of the present disclosure wherein a glass sheet adjacent to an exterior glass sheet projects beyond the bottom edge of the exterior glass sheet at the roof window bottom,
Fig. 43: illustrates angular variations of an extension surface relative t a plane comprising a glass sheet surface, according to various embodiments of the present disclosure.

Detailed description

Fig. 1 illustrates schematically a cross section of a roof window 1 for installation in a roof structure of a building (not illustrated in fig 1). The roof window comprises a frame 2 and a vacuum insulated glass unit 3.
The frame 2 comprises a movable frame 2a (also called movable unit in the present document) and a fixation frame 2a. The movable frame 2a is configured to move, such as pivot, relative to the fixation frame 2b by means of one or more hinges (not illustrated in fig. 1) between an open position and a closed position. Hence, the window 1 can open and close.
The vacuum insulated glass unit 3 (may also be referred to as glass unit 3 in the below) is attached to the movable frame 2a and is configured to move together with the movable frame 2a. The movable frame 2a comprises a first frame opening FO1 that is enclosed by structural frame profiles 2a_to, 2a_bo, at the top TO and bottom BO of the roof window respectively. The movable frame 2a moreover comprises two structural side frame profiles 2a_si (one is visible in fig. 1) extending between the top profile 2a_to and bottom profile 2a-bo. The frame profiles of the movable frame 2a together encloses the first frame opening FO1, which may be a rectangular frame opening, through which sunlight can pass from the vacuum insulated glass unit.
The roof window 1 in fig. 1 is a roof window of the center hung type. The movable frame 2a is enclosed by a fixation frame 2b which provides a second frame opening FO2. Hence, a bottom profile surface 2a_bos1 (See figs 2A-2B) of the movable frame 2a faces the first frame opening FO1 whereas an oppositely directed surface 2a_bos2 (See figs 2A-2B) of that bottom profile 2a_bo faces the fixation frame 2b. The fixation frame 2b encloses the second frame opening FO2. The second frame opening FO is arranged between structural top 2b_to and bottom 2b_bo profiles, as well as between structural side profiles 2b_si (one is visible in fig. 1) of the fixation frame 2b. The movable frame 2a is thereby arranged in the second frame opening FO2. The fixation frame 2b is configured to be fixed to, such as build into, a building roof structure. The roof window 1 comprises water tightening covers comprising a top cover 24 and a cladding member 13. The roof window 1 may also comprise side water covers 21a, 21b (not illustrated in fig. 1). These covers are described in more details further below.
The frame profiles 2a_bo, 2a_to, 2a_si of the movable frame 2a and/or the frame profiles 2b_bo, 2b_to, 2b_si of the fixation frame 2b may be substantially solid, e.g., made partly or fully from a wood material or a combination of materials.
In some embodiments of the present disclosure, one, more than one, or all, of the frame profiles 2a_bo, 2a_to, 2a_si, 2b_bo, 2b_to, 2b_si may comprise an outer shell provided by exterior profile walls providing the outer profile boundary. The exterior walls may be structural. The exterior walls may in some embodiments comprise or consist of a polymer wall such as comprising a Polyvinyl Chloride (PVC) walls such as Chlorinated Polyvinyl Chloride (CPVC). In some embodiments, the polymer wall material of the exterior walls may be reinforced by means of reinforcements, such as fibres, such as glass fibres or carbon fibres, intermixed with the polymer wall material. In some embodiments, the polymer wall material may comprise between 15% and 35% fibre reinforcement by WT profile wall material, such as between 20% and 30% fibre reinforcement by weight profile wall material. In other embodiments, the exterior profile walls may not comprise fibre reinforcement. In some embodiments, the fibre reinforcement content by WT profile wall material may be less than 3%, such as less than 1% or less than 0.5% by weight.
The exterior walls of the frame profiles may enclose a frame profile interior comprising one or more interior chambers. This/these chambers may provide heat insulation. In some embodiments, one or more of the one or more interior chambers may be filled with an insulation material such as comprising an expanded foam, mineral wool, glass wool, natural fibre based insulation and/or the like. In further embodiments, one or more reinforcements such as metal reinforcements, such as aluminium, iron or steel reinforcements, may be arranged in or at the frame profiles 2a_bo, 2a_to, 2a_si, 2b_bo, 2b_to, 2b_si to increase the structural strength.
It is noted that the frame profiles 2a_bo, 2a_to, 2a_si, 2b_bo, 2b_to, 2b_si are elongated, and in fig. 1, a schematic cross section of profiles 2a_bo, 2a_to, 2b_bo, 2b_to is illustrated where the cross section plane is substantially perpendicular to the longitudinal direction of these profiles 2a_bo, 2a_to, 2b_bo, 2b_to. The cross section plane is substantially parallel with the longitudinal direction of the side profiles.
The movable frame may or may not comprise a handle 27 for manually operating the movable frame between a closed and open position/state. The handle may be directly or indirectly connected to a locking mechanism (not illustrated) that enables locking the movable frame 2a relative to the fixation frame 2b in at least the closed position of the movable unit.
The vacuum insulated glass unit 3 comprises a first glass sheet 3a comprising a first major surface 3a1, and a second glass sheet 3b comprising a second major surface 3b1. These major glass sheet surfaces 3a1, 3b1 faces each other and an evacuated gap 4 paced between the major surfaces 3a1, 3b1. The glass sheet surfaces 3a1, 3b1 are substantially parallel. The glass sheets also comprises oppositely directed, major surface 3a2. 3b2 facing away from the evacuated gap 4.
A plurality of support structures 5 are arranged between the glass sheet surfaces 3a1, 3b1 with a mutual distance to the neighbouring support structures. These support structures 5 are distributed inside the evacuated gap 4 according to a predetermined pattern, e.g., in rows and columns. The support structures 5 maintains the gap 4 between the major glass sheet surfaces 3a1, 3b1 of the vacuum insulated glass (VIG) unit when the gap 4 has been evacuated and sealed.
The glass sheets 3a, 3b are sealed together at the periphery of the glass sheets 3a, 3b with the plurality of support structures 5 arranged between the major surfaces 3a1, 3b1 in the evacuated gap 4. The sealing together of the first and second glass sheets 3a, 3b may comprise use of an edge seal 9 material such as a solder glass edge seal material or a solder metal edge seal material. In some embodiments, the edge seal 9 material may comprise solder material such as a glass solder material, for example a glass solder frit material, such as a low melting point glass solder frit material.
The vacuum insulated glass unit 3 may in some embodiments comprise more than 300 support structures 5, such as more than 1000 or more than 2000 support structures 5arranged in the evacuated gap 4. The vacuum insulated glass unit 3 may in some embodiments comprise between 500 and 10000 support structures 5, such as between 1000 and 600 support structures in the evacuated gap 4.
In some embodiments of the present disclosure, the low melting point glass solder frit material may have a rated melting temperature Tm below 500 °C, such as below 450 °C, such as below 410 °C. In some embodiments of the present disclosure, the low melting point glass solder frit material may have a rated melting temperature Tm above 300 °C, such as above 340 °C.
The sealing together of the glass sheet 3a, 3b at the edges by the edge seal 9 may provide a fused, rigid edge seal. The edge seal encloses the evacuated gap around the periphery of the evacuated gap 4.
Both major surfaces 3a1, 3b1 of the first and second glass sheet 3a, 3b which face the evacuated gap 4 may, in embodiments of the present disclosure, extend so as to cover the full, maximum width of the edge seal 9. This may be the case for the full extent of the edge seal 9 around the evacuated gap 4. Hence, the edge seal 9 may be arranged so as to substantially not extend beyond the glass sheet edges of the first 3a and second 3b glass sheets arranged proximate the edge seal 9.
In some embodiments, one or both glass sheets 3a, 3b may extend beyond the side 9a of the edge seal 9 facing away from the evacuated gap.
In some embodiments, the side 9a of the edge seal 9 facing away from the evacuated gap may be arranged between the major surfaces 3a1, 3b1 of the glass sheets 3a, 3b.
One or both glass sheets 3a, 3b may have a thickness between 1 mm and 6 mm, such as between 2 mm and 4 mm, for example between 2.5 mm and 3.5 mm including both end points. The glass sheets 3a, 3b may be of the same or different thickness.
In some embodiments, one or both glass sheets 3a, 3b has a thickness of between 2.5 mm and 5 mm, such as between 3 mm and 4.5 mm, such as 3 mm or 4 mm.
The glass sheets 3a 3b may be annealed glass sheets or tempered glass sheets, such as thermally tempered glass sheets. Thermally tempered glass sheets 3a, 3b may, e.g., allow providing a VIG unit with larger mutual distance between adjacent support structures 5 and/or may allow use of thinner glass sheets 3a, 3b than if using annealed glass sheets.
The distance between neighbouring support structures 5 in the gap 4 may in embodiments of the present disclosure be between 20 mm and 70 mm, such as between 25 mm and 65 mm, such as between 35 mm and 45 mm.
If the glass sheets 3a and/or 3b are thermally tempered glass sheets, the major surfaces 3a1, 3a2, 3b1, 3b2 of these may be uneven due to, e.g., a plurality of so-called roller waves, bending and/or due to global edge kink. These characteristics may originate from the manufacturing process of the thermally tempered glass sheets.
The evacuated gap 4 has been evacuated to a reduced pressure (e.g. provided at an evacuation and sealing station. In embodiments of the present disclosure, the pressure in the evacuated gap 4 may be below 0.05 mbar, such as below 0.005 mbar, such as 0.003 or 0.001 mbar or below. This may be obtained by means of an evacuation pump before sealing the gap 4.
For this evacuation of the gap 4, a pump (not illustrated) may have been connected directly or indirectly to an evacuation hole of the VIG unit assembly, and after the evacuation, the evacuation hole is sealed by a gap sealing, such as at least partly by means of a solder material and/or another sealing solution, such as a permanent sealing solution. In some embodiments, the evacuation hole sealing solution may comprise a solder material and/or a glass pipe to be sealed by heating when the gap 4 has been finally evacuated to provide a VIG unit. In some embodiments, the evacuation of the gap 4 may be provided by means of a suction cup (not illustrated) arranged to cover an evacuation hole. In other embodiments, the evacuation may be provided inside an evacuation chamber.
The support structures 2 maintains a distance between the glass sheet surfaces 3a1, 3b1 across the evacuated gap when the gap 4 has been evacuated and sealed to provide the final VIG unit.
The distance between the major glass sheet surfaces 3a1, 3b1 facing the gap may in embodiments of the present disclosure be 0.5 mm or below, such as 0.3 mm or below, for example 0.2 mm or below. The distance between the major glass sheet surfaces 3a1, 3b1 facing the evacuated gap 4 may in embodiments of the present disclosure be between 0.05 mm and 0.6 mm, such as between 0.1 mm and 0.4 mm, such as between 0.15 and 0.25 mm. It is understood that the support structures 5 may have a height substantially matching such a gap height / distance between the glass sheet surfaces 3a1, 3b1.
It is generally to be understood that the final VIG unit 3 may, e.g., be transparent to at least visible light, i.e. light in the spectrum that is visible to the human eye.
The vacuum insulated glass unit may also, in embodiments of the present disclosure, comprise a lamination layer 3c, 6. For example a multi-layer lamination layer, as illustrated.
The lamination layer 6, 3 in fig. 1 comprises a lamination interlayer 6. The lamination interlayer 6 may in embodiments comprise or consist of one or more of the following: ethylene vinyl acetate (EVA),

polyisobutylene (PIB),
polyacetals such as polyvinyl butyral (PVB),
transparent polyurethane (PU),
thermoplastic polyurethane (TPU),
polyvinyl chloride (PVC),
polyesters,
cyclo olefin polymers (COP),
ionomers and/or an ultraviolet activated adhesives.

In some embodiments, PVB, EVA or TPU may be preferred for the lamination interlayer.
In one or more embodiments, the lamination interlayer 6, may have a thickness (extending between the adjacent glass sheet surfaces) above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm.
In some embodiments, the lamination interlayer 6 has a thickness between 0.5 mm and 4 mm, such as between 0.6 mm and 3 mm, such as between 0.7 mm and 2 mm or between 1 mm and 3 mm.
The lamination layer also, in fig. 1, comprises a further glass sheet 3c attached to said lamination interlayer 6. The further glass sheet 3c may be tempered, such as thermally tempered, or annealed. The further glass sheet 3c, also called a lamination glass sheet 3c in this document, may have the same thickness, a lower thickness or a larger thickness, than the glass sheet thickness of the first and second glass sheets 3a, 3b. The lamination layer 3c, 6 provides safety and may, e.g., carry broken parts of the glass unit 3 in case of breakage thereof, thereby reducing the number of falling parts.
The roof window is configured to be installed in a building roof structure so that the first glass sheet 3a of the vacuum insulated glass unit 3 is configured to be placed closer to the exterior EXT of the building than the second glass sheet 3b.
As can be seen in fig 1 and several other figures described in more details further below according to various embodiments of the present disclosure, the vacuum insulated glass unit 3 comprises an exterior glass sheet EGS. In fig. 1, the exterior glass sheet is the first glass sheet 3a. The exterior glass sheet is configured to be the outermost glass sheet arranged proximate the building exterior and which may act as a weather shield when the movable frame is in a closed position as, e.g., illustrated in fig. 1. The exterior glass sheet EGS comprises the outer major surface of the glass unit 3 that faces towards the building exterior EXT and may abut the building exterior.
The exterior glass sheet EGS comprises a first projecting glass sheet portion 3p1. This first projecting glass sheet portion 3p1 projects beyond a bottom edge 3b_be of the second glass sheet 3b with a first projecting distance DIS1, The bottom edge of the second glass sheet 3b is configured to be the bottom edge of the glass sheet 3b that is arranged at the roof window bottom BO when the roof window is installed in the roof structure.
In fig. 1, the evacuated gap 4 of the glass unit 3 is arranged between the major surface 3a1 of the exterior glass sheet 3a and the major surface 3b1 of the second glass sheet, where the second glass sheet 3b is adjacent to the exterior glass sheet EGS, 3a of the vacuum insulated glass unit 3. Hence, the first projecting glass sheet portion 3p1 projects with the first projecting distance DIS1 beyond the bottom edge 3b_be of the glass sheet 3b of the vacuum insulated glass unit 3 which is adjacent to the exterior glass sheet 3a, 3d EGS of the vacuum insulated glass unit 3.
The roof window is configured to be installed so that the window top TO is arranged at a higher vertical level than the window bottom BO. As the roof window 1 in fig. 1 is of the center hung type, the top part of the movable frame 2a is configured to move into the building, see dashed arrow AR1 whereas the bottom part of the movable frame 2a is configured to move towards the exterior of the building, see dashed arrow AR2. The rotation point for the movable frame 2a may be arranged between the top and bottom profiles 2a_bo, 2a_to, for example around the center portion of the side profiles 2a_si. Roof windows of the center hung type may, e.g., allow rotation of the movable frame so that the exterior surface 3su1 of the glass unit may at least partly face the building interior INT during window cleaning/wash.
The roof window 1 may be of the type configured to be installed in a roof structure having a roof pitch above 17°, such as above 30° relative to horizontal.
As can be seen, the first projecting glass sheet portion 3p1 overlaps one or more structural bottom profiles 2a_bo, 2b_bo of the frame 2, 2a, 2b. In fig. 1, the first projecting glass sheet portion 3p1 with the first projecting distance DIS1 so as to both overlap the bottom profile 2a_bo of the movable frame and the bottom profile 2b_bo of the fixation frame.
In fig. 1, the second glass sheet 3b and a part of the evacuated gap 4 also overlaps a part of the bottom frame 3a_bo. This may help to move the edge seal further away from the first frame opening FO1, which may be advantageous as the edge seal 9 material may act as a cold bridge.
The first projecting distance DIS1 may in embodiments of the present disclosure be at least 6 mm such as 10 mm, such as at least 25 mm, such as at least 40 mm.
The first projecting distance DIS1 may in embodiments of the present disclosure be at least 40 mm, such as at least 50 mm, such as at least 80 mm, such as at least 100 mm.
In some embodiments of the present disclosure, the first projecting distance DIS1 may be no more than 30 mm, such as no more than 25 mm.
In some embodiments of the present disclosure, the first projecting distance DIS1 may be no more than 100 mm, such as no more than 80 mm, such as no more than 60 mm.
In some embodiments of the present disclosure, the first projecting distance DIS1 may be between 10 mm and 120 mm, such as between 25 mm and 80 mm, such as between 40 mm and 60 mm.
In some embodiments of the present disclosure, the first projecting distance DIS1 may be larger than the glass unit 3 thickness, such as wherein said glass unit 3 thickness substantially corresponds to the distance between the exterior major surfaces 3su1, 3su2 of glass unit in a direction perpendicular to a major surface of the exterior glass sheet EGS.
In fig. 1, the exterior glass sheet EGS, 3a overlaps the full width W1 of the structural bottom profile 2a_bo of the movable frame. This is obtained by a part of the exterior glass sheet EGS placed opposite to the evacuated gap 4, and a further part of the glass sheet that is part of the first projecting glass sheet portion 3p1. In other embodiments, the exterior glass sheet EGS may not overlap the full width W1 of the structural bottom profile 2a_bo of the movable frame, but may instead only partly overlap the full width W1 of the structural bottom profile 2a_bo (see, e.g., fig. 34).
In fig 1, the bottom edge of the second glass sheet 3b, and the bottom edge of the lamination layer, are terminated at a location above a surface 2a_S3 of the bottom frame profile 2a_bo that faces the glass unit 3.
The bottom frame profile 2a_bo comprises a profile surface 2a_S1 that faces and abut/borders the first frame opening FO1 and a second surface 2a_S2 that faces away from the first frame opening FO1 and faces towards the bottom profile 2b_b1 of the fixation frame.
The profile surface 2a_S1 comprises an outer extremity 2a_S1e which faces the first frame opening FO1.
A gasket, such as a resilient gasket 26 is placed between the frame profile 2a surface 2a_S3 and the glass unit 3. This gasket may abut the outer major surface 3su2 of the glass unit 3 that faces towards the interior INT of the building, In the example of fig. 1, the further glass sheet 3c comprises this glass sheet surface 3su2.
The frame profile 2a surface 2a_S3 extends between the profile surfaces 2a_S1 and 2a_S2 and may comprise one or more recesses and/or protrusions for receiving, e.g., gaskets, for holding members 13, covers, supports 15, 19 and/or the like.
In fig. 1, the first projecting glass sheet portion 3p1 overlaps the width W2 of the further structural bottom profile 2b_bo. The first projecting glass sheet portion 3p1 may partly or fully overlap the further structural bottom profile 2b_bo. In other embodiments, the first projecting glass sheet portion 3p1 may stop/be terminated at a location so that it does not overlap the width W2 of the further structural bottom profile 2b_bo.
As illustrated in fig. 1 and other figures described in more details further below, at least one insulating gap, in fig. 1 the evacuated gap 4, is arranged between a major surface 3a1 of the exterior glass sheet 3a and a major surface 3b1 of a glass sheet 3b of the vacuum insulated glass unit 3 which is adjacent to the exterior glass sheet EGS of the vacuum insulated glass unit 3. The major surface 3a1 faces towards the building interior INT.
The first projecting glass sheet portion 3p1 overlaps the bottom profile 2b_bo of the fixation frame 2b. The roof window may comprise a cladding member 13 for water tightening at the roof window bottom. The cladding member 13 comprises a covering part 13b which is configured to provide water tightening at the bottom BO part of the roof window 1.
The covering part 13b extends in a direction away from a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit to a position opposite the exterior of the fixation frame so as to overlap a part of the fixation frame 2b.
The cladding member 13 comprises a connection part 13a.
The covering part 13b and in some embodiments also at least a part of the connection part 13a may in some embodiments be visible from the outside of the window when the movable frame 2a is in a closed position.
In fig. 1, the connection part 13a overlaps the first projecting glass sheet portion 3p1. In some embodiments, the connection part 13a may additionally or instead overlap an extension 18 (the extension 18 is not illustrated in fig. 1, see figures described further below).
In fig. 1, the connection part 13a extends in between the fixation frame 2b and the first projecting glass sheet portion 3p1. As described in more details further below, the connection part 13a may be attached to the glass unit 3 and/or the movable frame 2a, e.g., by means of an adhesive and/or by means of one or more mechanical fasteners. The covering part 13b moves together (see figs. 2A-2B) with the movable frame 2a when it is opened.
In some embodiments, the connection part 13a is unitary with the covering part 13b. The cladding member 13, such as the connection part 13a and/or covering part 13b, may comprise or consist of a sheet material, such as a metal sheet material, such as comprising aluminium, iron or steel, or a polymer sheet material. The sheet material may comprise one or more bends, welds, soldering and/or the like to shape the cladding member. The sheet material may be structurally hard so as to not deform if subjected to outer forces such as, e.g., wind, rain, snow or the like. The sheet material comprising the cladding member 13 (and/or possibly also other parts 15, 19, 18) may have a thickness between 0.5 mm and 2 mm, such as between 0.5 mm and 1.3 mm, such as between 0.7 mm and 1.0 mm.
The top cover 24 overlaps the movable frame 2a and/or the glass unit. In fig. 1, the top cover overlap both the movable frame 2a and a top part of the exterior major surface 3su1 of the vacuum insulated glass unit 3. The top cover may, e.g., comprise a sheet material, such as a metal sheet material, such as comprising aluminium, iron or steel, or a polymer sheet material. The sheet material of the top cover may comprise one or more bends, welding and/or solder provided in order to shape the top cover. The top cover 24 is attached to the fixation frame 2b by means of an adhesive and/or one or more mechanical fasteners such as comprising screws, clamps, pop rivets, soldering or welding and/or the like. The upper part of the movable frame 2a may move away from the top cover 24 (see also fig. 2B) when the movable frame 2a is moved to an open position.
In fig. 1, the roof window comprises a step support 15 configured to support the first projecting glass sheet portion 3p1. The step support 15 is placed between the first projecting glass sheet portion 3p1 and the frame profile 2a. The step support 15 is attached to a bottom profile 2a_bo of the movable frame 2a. This attachment of the step support 15 may be obtained by means of one or more adhesives and/or by means of one or more mechanical fasteners such as pop rivets, clamps, hooks, screws and/or the like (not illustrated in fig. 1).
In fig. 1 and several of the figures described below, one or more supports 15 is/are placed between the first projecting glass sheet portion 3p1 and a surface 2b_boa, 2a_boa of one or both bottom profiles 2a_bo, 2b_bo facing the first projecting glass sheet portion 3p1.
The step support 15 is configured to support the first projecting glass sheet portion 3p1 at least when the movable frame 2a is in a closed position. The step support 15 may be configured to support the first projecting glass sheet portion 3p1 also when the movable frame 2a is in an open position. The step support 15 transfers impacts acting on the first projecting glass sheet portion to the frame and may hence provide a solution that is less likely to break, e.g., in case of hail storms or if other foreign objects strikes the first projecting glass sheet portion 1b.
The step support 15 or supports (more than one support may in some embodiments be present, see, e.g., 15a, 15b of fig. 10) may be attached to the first projecting glass sheet portion 3p1, such as by means of one or more an adhesives and/or mechanical fasteners. This attachment may be provided directly between the step support 15 and the glass sheet portion 3p1, or through one or more intermediate members, such as comprising, e.g., an extension support (described in more details later on), a connection part 13a of a cladding member 13 and/or the like.
In fig. 1, the connection member 13a and the step support 15 may be different parts. Here, the connection member 13a extends in between the step support 15 and the projecting glass sheet part 3p1. These parts 13a, 15 may be attached to each other.
In some embodiments, as also illustrated in one or more figures described further below, see, e.g., fig. 12 and figs. 2A-2B, the cladding member 13 and the support or supports 15 for supporting the projecting glass sheet portion 3p1 may be integrated in the same part. In some embodiments, the cladding member 13 and the step support or supports 15 for supporting the projecting glass sheet portion 3p1 may be a unitary part part.
Fig. 1 also illustrates (see also figs 2A-2B) that the movable frame 2a comprises a water protection gasket member 14 that may extend from a position between the cladding member 13 and the exterior glass sheet EGS, and to a position at the bottom profile 2a_bo of the movable frame 2a. In fig. 1, this gasket 14 extends in between the second outer surface 3su2 of the glass unit 3 and the surface 2a_S3 facing the second outer surface 3su2. Hence the gasket 26 that is placed between the glass unit and the frame profile 2a_bo is integrated with the gasket member 14 between the first projecting glass sheet portion and the fixation frame 2b profile 2b_bo. The gasket 26 may extend over substantially the full width W1 of the movable frame 2a bottom profile 2a_bo and moreover over a part of or the full width W2 of the fixation frame where it provides gasket member 14.
The gasket 26 and the gasket member 14 may also be separate gaskets in other embodiments of the present disclosure.
Fig. 1 and several figures described below illustrates a roof window 1 that is not illustrated to comprise an extension at the roof window bottom BO, see, e.g., fig. 1-13. It is however understood that the roof window 1 of one or more of these figures may also in further embodiments be adapted to comprise an extension 18 providing an extension distance DIS2. For example it may comprise an extension as described according to various embodiments of the present disclosure further below, (see, e.g., reference 18 and other references relating to embodiments of an extension), for example described in relation to one or more of figures 13-17, 24, 28, 31, 34, 40, 41. The projection distance DIS1 may in some embodiments be adapted accordingly.
Figs. 2A-2B illustrates schematically a cross section of a bottom part BO of a roof window 1, such as a centre hung roof window type or a top hung roof window type, according to embodiments of the present disclosure.
As can be seen in fig. 2A, covering part 13b extends in a direction away from a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit 3, to a position opposite the exterior of the fixation frame so as to overlap a part of the fixation frame 2b. This is when the movable frame 2a is in a closed position POS1. This provides water tightening at the window bottom BO.
The roof window 1 may comprise a water tightening gasket 28 at the bottom BO, and the covering member 13b may comprise this 28 or engage with it 28 in the closed position POS1. This gasket solution 28 may, e.g., be arranged between the covering part of the movable frame/unit 2a, and a fixed cladding member 29 that is attached to the fixation frame 2b. See also fig. 37.
As can be seen in fig. 2A, covering part 13b extends in a direction away from a plane PL1 which comprises a major exterior surface 3su1 of a glass sheet of the vacuum insulated glass unit 3. As the movable frame 2a is here in an open position POS2, the covering part 13b of the cladding member 13 does not longer extend to a position opposite the exterior of the fixation frame 2b.
As can be seen in fig. 2A, the exterior surface 3su1 of the vacuum insulated glass unit 3 may in some embodiments be configured to be arranged above an exterior second plane PL2 defined by a flashing 22 of the roof window 1 and/or defined by the roof structure 50, such as a roofing material 51 (see, e.g., fig. 3), when the roof window 1 is installed in a roof structure 50 of the building and the movable frame/unit 2a is in a closed position POS1.
As can be seen in fig. 2A-2B, the angle between the second plane PL2 and the first plane PL1 may change when the movable frame 3a is opened.
In fig.1 and 2A-2B, The gasket member 14 also extends in between the cladding member 13 of the movable frame 2a and the fixed cladding member 29 of the fixation frame 2b.
The water protection gasket member in figs. 1-2B also comprises the resilient gasket 26.
The gasket(s) 14 and/or 26 may be resilient gaskets, such as rubber gaskets, e.g., made from natural and/or synthetic rubber, silicone and/or the like.
Fig. 3 illustrates schematically a roof window according to embodiments of the present disclosure, installed in a building roof structure 50, seen from the outside.
The building roof structure 50 comprises a roofing 51. The roofing 51 may comprise one or more of roof shingles, roof tiles, roofing felt/asphalt roofing, metal plates, fibre plates corrugated plates and/or the like. The roofing/ roofing material 51 acts as the primary, exterior weather shield at the building roof and is subjected to rain, snow, sunlight, hails, wind and/or the like. The roofing material 51 may, e.g., be attached to a structural roof structure such as roof battens or the like, see, e.g., fig. 21.
The first projecting glass sheet portion 3p1 here overlaps, in this embodiment, both the bottom profile 2a_bo of the movable frame 2a, and the bottom profile 2b_bo of the fixation frame. These bottom profiles 2b_bo, 2a_bo are dashed as they may not be visible from the outside, e.g., due to an enamel (various embodiments hereof are described in more details further below) configured to hide frame components/parts, edge sealings of the glass unit 3 and/or the like so that they are not visible through the glass unit 3 from the outside.
It can also be seen that the roof window 1 has a width direction WD extrending between roof window sides SI1, SI2, and a height direction HD, where the height direction extends perpendicular to the width direction WD between window top TO and window bottom BO.
The roof window may comprise water tightening elongated side water covers 21a, 21b which overlap the major exterior glass sheet EGS surface 3su1 of the vacuum insulated glass unit.
The roof window in fig. 3 is of the center hung type. The side water covers 21a, 21b in this example therefore comprises first side water covers 21b, comprising lower side water covers, attached to the movable frame 2a and/or insulating glass unit 3. When the movable frame is moved towards the open position, the first side water covers 21b moves together with it. The roof window moreover comprises second side water covers 21a, comprising upper side water covers, attached to a fixation frame 2b of the roof window 1. The second side water covers 21a may be fixed to and unmovable relative to, the fixation frame 2b when the movable unit 2a is opened. When the movable frame is in a closed position (see fig. 2A), the first and second side water covers 21a, 21b may be arranged in continuation of each other.
The elongated side water covers 21a, 21b are longitudinal and extends in the height direction HD. The elongated side water covers 21a, 21b may overlap a side frame profile 2b_s of the fixation frame 2b. The elongated side water covers 21a, 21b may also overlap a side frame profile 2a_si of the movable frame 2a.
The elongated side water covers 21a, 21b may, e.g., be made from or comprise a metal plate, a polymer plate and/or the like that acts as a water cover and may also be resistant in order to act as a shield against outer forces.
The roof window flashing 22 is arranged to guide, e.g., rainwater onto the roofing material 51 of the building roof structure 50.
Fig. 4 illustrates schematically an embodiment of the present disclosure wherein one or more glass sheets 3a, 3b are arranged between the exterior glass sheet EGS and the lamination layer 3c, 6 and comprises a second projecting glass sheet portion 3p2. The second projecting glass sheet portion 3p2 projects beyond the lamination layer 3c, 6. In fig. 4, the second glass sheet 3b comprising the major surface 3b1 facing the evacuated gap and on which support structures 5 support, is the glass sheet comprising the second projecting glass sheet portion 3p2. This is in fig. 4 illustrated at the roof window bottom BO. Here, the second projecting glass sheet portion 3p2 projects beyond a bottom edge 6e of the lamination interlayer 6 at the bottom BO of the roof window. It may also, as illustrated, project beyond a bottom edge 3c_be of the further glass sheet/lamination glass sheet 3c. In further embodiments, this may additionally or alternatively be provided at sides and/or at the top TO of the roof window, so that one or more glass sheets 3a, 3b arranged between the exterior glass sheet EGS and the lamination layer 3c, 6 and comprises a projecting glass sheet portion projecting beyond the lamination layer 3c, 6 at sides and or top TO of the window 1.
The lamination layer interlayer 6 (6a) and/or the lamination glass sheet 3c may though still be configured to at least partly overlap a bottom frame profile 2a of the frame 2 as illustrated. The gasket 26 is placed between the frame profile 2a_bo and the lamination layer 6, 3c.
As illustrated, the edge seal 9 may not be overlapped by the lamination layer 6, 3c. Hence, in fig. the glass unit may comprise a double step solution where the first projecting glass sheet portion 3p1 projects beyond the edge 3b_be of the second glass sheet 3b, and both the exterior glass sheet EGS and the second glass sheet extends beyond the edge 6e, 3c_be of the lamination layer 6, 3c.
It is noted that if the glass unit 3 comprises a third glass sheet 3d and a further insulating gap 7 (not illustrated in fig. 4, various embodiments hereof are described further below), the third glass sheet 3d may or may not project beyond the edge 6e, 3c_be of the lamination layer 6, 3c.
Fig. 5 illustrates schematically an embodiment of the present disclosure, wherein a gripping member 8a of a mechanical fastening part 8 (one or more 8 may be provided) extends in between glass sheets of the vacuum insulated glass unit 3 so as to provide a fixation of the vacuum insulated glass unit 3 to the frame 2, such as to the movable frame 2a. The mechanical fastening part 8 may be made from, e.g., metal and/or plastic, and the gripping member 8a may clamp the glass unit 3 to the frame 2a. In fig. 5, the gripping member 8a extends in between the exterior glass sheet EGS and the third glass sheet lamination glass 3c, and holds onto the lamination glass 3c. In some embodiments (not illustrated) it 8a may also hold onto, such as be attached to, the interlayer 6. In fig. 5, the one or more mechanical fastening parts 8 are arranged to hold at the bottom of the glass unit at the window bottom BO. Additionally or alternatively, a similar solution may be provided at sides and/or top TO of the window 1.
As also illustrated in fig. 5, and in figs 1-2B, the roof window 1 may comprise tightening gaskets 31 configured to provide tightening, such as water- and/or air tightening between the movable frame 2a and fixation frame 2b. These 31 may be resilient and be deflected by one or both frames 2a, 2b when the movable frame 2a is closed.
Fig. 6 illustrates schematically an embodiment of the present disclosure, wherein the vacuum insulated glass unit 3 comprises a protection sealing 11, The protection sealing covers the edge seal 9, such as a solder edge seal, such as a glass solder edge seal or metal solder edge seal, enclosing the evacuated gap 4. The first glass sheet 3a, such as the first projecting glass sheet portion 3p1 overlaps the protection sealing 11. The protection sealing 11 may be a resilient, water tightening sealing. For example, the sealing may comprise a butyl sealing, a rubber sealing, a polymer sealing and/or the like. The sealing may or may not adhere to one or more surfaces, such as the major surface 3a1 of the first glass sheet 3a that also faces the evacuated gap 4, a surface, such as the edge 3b_be surface of the second glass sheet 3b, a surface of the edge sealing 9 and/or the like. The protection sealing 11 protects the edge seal 9 from being exposed to water and may in some embodiment provide a substantially hermetic seal to protect the edge seal 9. The first overlapping portion 3p1 may help to provide further protection of the edge seal 9.
In some embodiments, an enamel layer 12 may (not illustrated in fig. 6, see below, see also fig. 20) or may not, be placed between the protection sealing 11 and the glass sheet 3a.
Fig. 7 illustrates schematically an embodiment of the present disclosure, where an enamel layer 12 provides a hiding feature. Here, the vacuum insulated glass unit 3 comprises an enamel layer 12, such as an enamel layer 12 which is substantially opaque to at least visible light. The enamel layer 12 covers, such as is applied to, a surface 3a1, 3p1s of the exterior glass sheet EGS, which in this embodiment is the first projecting glass sheet 3a. In other embodiments, if another glass sheet than the first glass sheet 3a is the exterior glass sheet, the enamel layer 12 may cover, such as be applied to, this glass sheet instead.
The enamel layer 12 covers a major surface of the first projecting glass sheet portion 3p1. In this embodiment, that covered surface is part of / comprised in the major surface 3a1, 3d1 of the exterior glass sheet EGS configured to face towards the interior INT of the building when the roof window is installed in a building roof structure 50.
The enamel may provide a masking.
The enamel layer 12 may be visible through the exterior glass sheet EGS from the outside/exterior EXT of the roof window 1 but may hide further parts of the roof window as it is opaque. In some embodiments, the enamel 12 may, in combination with the gasket 26, 14 described above, hide the frame and/or other parts of the roof window when looking though the exterior glass sheet from the exterior EXT of the building. The enamel 12 may not cover the full width W1 (see fig. 1) of the frame profile of the movable frame 2, but the part of the frame profile 2a_bo that is not covered by the movable frame may be covered by the gasket 26, e.g., as illustrated in fig. 7 or fig. 1-2B. a part of the gasket 26 may be visible from the exterior EXT through the glass sheet. The enamel 12 and the gasket 26 may have the same colour, e.g., a dark colour such as grey or substantially black.
The edge seal 9 is 9 is in fig. 7 placed between the enamel layer 12 and the second glass sheet 3b. This may in some embodiments provide that the edge seal 9 abuts the enamel layer 12 and may be fixed thereto. This may, e.g., be provided during the VIG unit manufacturing where the enamel may be heated together with the edge seal material to a temperature above the melting point of the edge seal material 9, so that the edge seal material attach with a rigid connection to the enamel 12 material. Here, the edge seal 9 material may as previously mentioned comprise solder material providing, e.g., a glass solder edge seal or a metal solder edge seal.
The enamel layer 12 covers a major surface 3p1s of the first projecting glass sheet portion 3p1 so as to hide one or more parts 13, 14, 15, 2a, 2b of the roof window.
The enamel layer 12 may cover substantially an entire major surface 3p1s of the first projecting glass sheet portion 3p1.
The enamel layer 12 may in some embodiments, as illustrated, extend into the evacuated gap. In some further embodiments, one or more support structures 5 may support on the enamel layer 12. In other embodiments, no support structures 5 may support on the enamel layer 12. The enamel layer 12 may only partly, and not fully, overlap the profile 2a width W1 (see W1 in fig. 1).
In some embodiments, the frame 2a, 2b and/or other parts 13, 15, 19 of the roof window may be hidden by means of a combination of the enamel layer 12 and a sealing gasket 26.
The enamel layer 12 may in some embodiments comprise or be made from or comprise a glass material and/or a metal oxide layer. This may be applied during manufacturing of the glass sheet.
In some embodiments, a low-e coating, if present, may be removed from the glass sheet surface where the enamel layer is to be placed, prior to applying the enamel 12 material. This low-e coating may, e.g., be removed by means of laser.
The enamel layer 12 may be attached to the glass sheet surface already during hardening of the glass sheet if the glass sheet is a thermally tempered glass sheet. This enamel layer may be applied to the glass sheet and heated together with the glass sheet to a temperature above 500°C, such as above 600°C, in the hardening process of providing a thermally tempered glass sheet.
The enamel layer 12 may have a thickness below 0.15 mm, such as below 0.1 mm, such as below 0.04 mm. in some embodiments, the thickness of the enamel layer may be between 0.001 mm and 0.1 mm, such as between 0.02 mm and 0.05 mm.
Fig. 8 illustrates schematically an embodiment of the present disclosure, wherein the glass unit 3 comprises one or more low-e coatings 16a. The one or more low-e coatings 16a is illustrated by a bold line assigned ref. 16a.
The one or more low-e coatings 16a is/are arranged at a major surface 3b1 of the second glass sheet 3b facing towards the evacuated insulating gap 4.
The low-e coating(s) 16a may e.g., in some embodiments, comprise one or more silver layers and/or one or more dielectric layers. The low-e coating may be applied to the surface 3b1 that faces towards the exterior EXT of the building, faces the evacuated gap, and faces away from the interior INT of the building when the movable frame 2a (if present) is in a closed position.
In some embodiments, the one or more low-e coatings 16a, such as a low-e coating stack, may as illustrated be terminated before the edge seal 9 so as to not extend in between the edge seal 9 and the glass sheet 3b. The low-e coating 16a extends in between the support structures 5 and the glass surface 3b1.
In some embodiments, the one or more low-e coatings 16a, such as a low-e coating stack, may be terminated before the edge seal 9 so as to not extend in between the edge seal 9 and the glass sheet 3b. The low-e coating 16a extends in between the support structures 5 and the surface 3b1. The low-e coating may cover at least 90%, such as 95% or at least 98% of the surface 3b1 part facing the gap 4.
Fig. 9 illustrates schematically a further embodiment of the present disclosure, relating to a step support 15 for supporting the first projecting glass sheet portion 3p1. Here, a step support 15 comprises a support body part 15p which extends to, and is placed opposite to, a position opposite a surface 2b_boa of the bottom profile 2b_bo of the fixation frame facing the first projecting glass sheet portion. Hence, the step support 15 may provide support over a larger area of the projecting portion 3p1. The gasket 14 may in some embodiments extend between the glass sheet portion 3p1 and the bottom frame profile 2b_bo, such as between the step support 15 and the bottom frame profile 2b_bo.
The step support 15 body is attached to the frame profile 2a_bo of the movable frame 2a and extend therefrom to the placed between the first projecting glass sheet portion 3p1 and a surface of the bottom profile of the fixation frame. 2b_bo facing the first projecting glass sheet portion 3p1.
As also mentioned previously, the step support 15 may be attached to the first projecting glass sheet portion 3p1, such as by means of one or more adhesives 33 and/or mechanical fastener(s) (not illustrated).
Fig. 10 illustrates schematically an embodiment of the present disclosure where two supports 15a, 15b are provided. A first step support 15a is placed between the projecting portion 3p1 and the surface of the profile 2b_bo of the fixation frame 2b facing the projecting portion 3p1. Another step support 15b is placed between the movable frame 2a bottom profile 2a_bo and the projecting portion 3p1.
It is generally understood that in some embodiments, the support(s) 15, 15a, 15b may be attached to the first projecting glass sheet portion 3p1, such as by means of one or more adhesives 33 and/or mechanical fastener(s) (not illustrated). In some embodiments the adhesive(s) 33 may comprise a tape and/or a glue.
Fig. 11 illustrates an embodiment where a step support 15 is placed between the fixation frame and the projecting glass sheet portion 3p1, and which does not extend to a position opposite a surface of the frame profile 2a_bo facing the glass sheet.
Fig. 12 illustrates an embodiment of the present disclosure, wherein one or more of the one or more supports 15, 15a, 15b comprises one or more resilient support elevations 17. The resilient support elevations 17 may or may not comprise discretely arranged support elevations. In some embodiments, the support elevation(s) may be provided by means of an adhesive (see, e.g., 33a. 33b of fig. 38) adhering the glass sheet portion 3p1 to a step support 15 body, such as a polymer body or metal body, such as comprising aluminium, iron and/or steel.
In some embodiments, the support elevation(s) 17 may additionally or alternatively be provided by or comprise one or more resilient gaskets attached to the step support 15 body. This/these gaskets may comprise a rubber material, a silicone material, a butyl material and/or the like.
The support elevation 17(s) may, e.g., act as a damper for damping harming effects of sudden strikes from foreign objects acting on the projecting glass sheet portion 3p1.
Fig. 12 moreover illustrates an embodiment of the present disclosure where the step support comprises an attachment part 35 which is attached to the bottom profile 2a_bo of the movable frame 2a so that the step support 15 is carried by the profile 2a_bo.
In fig. 12, the step support and the cladding member comprising the covering part 13b are integrated, and the cladding member 13 is thereby also carried by the movable frame 2a.
Figs. 13-16 illustrates schematically various embodiments of the present disclosure, wherein an extension 18 is arranged in continuation of the bottom of the exterior glass sheet 3a EGS and extends with an extension distance DIS2. See moreover, e.g., figs. 31 and 34 an extension 18 according to various embodiments of the present disclosure.
The extension 18 is arranged opposite to the bottom edge 3a_be of the exterior glass sheet 3a, EGS, and is arranged in in continuation of the exterior glass sheet. The exterior surface 18a of the extension 18 may help to provide an impression of a continuous, larger exterior surface 3su1 of the exterior glass sheet EGS surface 3su1.
The exterior surface 18a of the extension may be substantially flush with the exterior major surface 3a2, 3su1 of the exterior glass sheet EGS which is configured to face away from the interior INT of the building. This is in fig. 13 illustrated by that the plane PL1 comprises both the exterior surface 18a of the extension (which may be a major surface of the extension 18) and the exterior major surface 3a2 of the exterior glass sheet 3a.
In some embodiments, the extension surface 18a may be flush with the surface 3su1 over at least 1 cm, such as at least 3 cm or at least 5 cm from the exterior glass sheet bottom edge 3a_be.
In fig. 1,the extension 18 comprises an extension body 20. The extension body 20 provides and/or comprises the exterior surface 18a of the extension 18. The extension body 20 is supported by, such as carried by, an extension body support 19. The extension body 20 is attached to the extension body support 19.
The extension body 20 may or may not be structural, such as may or may not contribute to the structural integrity of the extension 18.
In one or more embodiments of the present disclosure, the extension 18, such as the extension body 20 of the extension, may comprise one or more of a glass sheets, a metal sheet and/or a polymer sheet.
In some embodiments, an extension body 20 may comprises one or more functional parts. In some embodiments hereof, the one or more functional parts may comprise one or more electric circuitries and/or electric components. In some embodiments, the one or more functional parts may be configured to provide an output such as an electric output, such as measurement and/or sensor output, an electric power supply output and/or the like.
In some embodiments, the extension body 20 may comprise or be a photovoltaic module. The photovoltaic module may be configured to charge a rechargeable battery of an actuator (not illustrated) such as a chain actuator or a piston actuator configured to open and/or close the movable frame. In other embodiments, the actuator may comprise an electric motor for driving a window covering such as a blind or shutter and/or the like.
The rechargeable battery may additionally supply, e.g., radio communication circuitry, data processors and/or the like arranged at the roof window, e.g., in relation to control of the actuator by means of radio signals or the like from a hand held remote control device and/or from a central controller.
In some embodiments of the present disclosure, the extension body 20 may comprise one or more sensors such as comprising a rain sensor, a light sensor, a temperature sensor and/or a humidity sensor.
Generally, in various embodiments of the present disclosure, the extension body support 19 may be an integrated part of a cladding member 13 as, e.g., previously described. Additionally or alternatively, the extension body support 19 may be an integrated part of a step support 15 as, e.g., previously described.
In, e.g., fig. 13, the extension 18 comprises the extension body support 19 which provides a structural, mechanical holding part for holding the extension body 20.
It is understood that in some embodiments, an enamel layer which is substantially opaque to at least visible light may cover, such as be applied to, a surface of the extension body 20. This is however not illustrated. In some embodiments, the enamel may be substantially identical to the enamel layer 12 as previously described. In some embodiments hereof, the enamel layer 12 may be placed between the extension body 20 and an extension body support 19.
In fig. 13, the extension body 20 is supported by, such as carried by, a cladding member 13 of the roof window 1 which comprises the extension body support. In this embodiment, the extension body support 19 is an integrated part of a member, such as a profile, comprising the cladding member 13 and also an integrated part of a step support 15. It is however understood that in some embodiments, one or both of the cladding member 13 and/or step support 15 may be separate to the extension body support 19.
Fig. 13 moreover illustrates a further embodiment of the present disclosure where the extension body support 19 is attached to the bottom profile 2a_bo of the movable frame 2a so that the extension 18 is supported by the movable frame 2a, such as carried by the movable frame 2a. This is in fig. 13 provided by means of one or more fasteners 34 such as mechanical fasteners.
The extension body support 19 comprises an attachment part 35. This attachment part 35, such as a plate and/or a bracket/mounting, is attached to the frame profile 2a_bo by means of the one or more mechanical fasteners 34. The one or more mechanical fasteners 34 may comprise one or more of screws, nails, clips, clamps and/or pop rivets. The fastener(s) 34 may be releasable so that the extension body support 19 may be detached from and attached to the movable frame 2a one or more times. In some embodiments, the mechanical fasteners(s) 34 may be reused in this process.
One or more holes, recesses and/or protrusions may be provided in, such as integrated in, the attachment part 35 for receiving and/or providing one or more mechanical fasters.
In some embodiments, the extension body support 19 may comprise one or more installation guides 36. The installation guides may enable a user to faster and/or easier install the extension body support 19 precisely at the roof window, such as at the roof window profile. In fig. 13, the installation guide 36 is integrated in the extension body support 19. In fig. 13, the installation guide 36 comprises a protrusion for supporting on the bottom profile 2a_bo surface and thereby assure that the user attach the fastener(s) 34 at the correct location.
Guide 36 may additionally or alternatively be provided in cladding member and/or step support.
The installation guide 36 may in some embodiments also provide support for supporting the glass unit 3a. This is in fig 13 provided as the extension body support 19 also acts as the step support 15 and supports the first projecting glass sheet portion 3p1.
Fig. 13 moreover illustrates a further embodiment wherein a sealing 37, such as a silicone material, a butyl material and/or the like is arranged between the bottom edge 3a_be surface of the exterior glass sheet EGS and the extension body 20. This may, e.g., prevent water from entering in between the glass sheet EGS and the body 20. The sealing 37 may or may not comprise an adhesive feature so as to adhere to the glass sheet EGS and/or the body 20. The sealing 37 may or may not abut the body 20 and glass sheet EGS. In fig. 13, the sealing 37 abuts the extension body 20 and the glass sheet EGS
Fig. 14 illustrates an embodiment of the present disclosure wherein the extension 18 is supported by, such as mainly carried by, the vacuum insulated glass unit 3. In fig. 14, the extension 18 is supported by, such as mainly carried by, the first projecting glass sheet portion 3p1. This may, e.g., be provided by means of an adhesive which adheres the extension 18, such as the extension body 20 support 19, to the first projecting glass sheet portion 3p1 at the side of the first projecting glass sheet portion 3p1 facing towards the building interior INT. Even though not illustrated in fig. 14, the extension body 20 support 19 may also comprise a cladding member 13, see, e.g., 15.
It is generally understood that according to various embodiments of the present disclosure (See, e.g., figs. 13 and 16-17), the extension 18 may comprises a cladding member 13. This cladding member 13 is also described in more details above. The cladding member 13 comprises a covering part 13b which is configured to provide water tightening at the bottom BO part of the roof window 1. In some embodiments, the cladding member 13 may comprise the extension, such as the extension body support 20, or vice versa. I.e. the same member of the roof window may provide several features such as one or more of the cladding member 13, the step support 15 and/or a part 18, 19 of the extension 18.
Fig. 15 (and 16-17) illustrates an embodiment of the present disclosure wherein the extension body 20 is omitted and the extension 18 comprises an extension member 18b provided by a plate/sheet, such as a metal sheet/plate, e.g., comprising one or more of aluminium, iron or steel, and/or a polymer sheet/plate. The member 18b is arranged in continuation of the external glass sheet EGS bottom 3a_bo and provides the extension surface 18a. This surface 18a may or may not be substantially flush with the exterior glass sheet surface 2su1- See also fig. 43 and the description thereto. This plate/sheet 18b comprises the exterior surface 18a of the extension. In some embodiments, the exterior surface 18a may be provided by a painting layer, an enamel layer and/or the like applied at the plate/sheet.
Fig. 16 illustrates an embodiment of the present disclosure wherein the extension is attached to the exterior glass sheet 3b surface 3su2 of the glass unit 3 that away from the building exterior EXT and facing away from the exterior glass sheet EGS. This surface 3su2 may, e.g., be provided by means of the second glass sheet 3b, a lamination glass sheet 3c (not illustrated in fig. 16) or a further glass sheet of the glass unit 3, see, e.g., ref. 3d described in more details further below.
In both figs. 15 and 16, the extension member 18b is supported by, such as carried by, the glass unit 3.
The attachment of the extension member 18b to the glass unit 3 may, e.g., be provided by means of an adhesive connection.
In some embodiments, a solution as illustrated in one or more of figs. 14-16 may be combined with an extension body 20 as previously described, so that the extension body 20 is supported by the glass unit 3 through the extension member 15b, whereby the extension member 18b provides the extension body support 19.
As illustrated in figs 15-17, the extension member 18b may comprise or provide the cladding member 13 comprising a covering part 13b as, e.g., previously described
Fig. 16 moreover illustrates an embodiment of the present disclosure, wherein the extension 18 is substantially unsupported by the exterior glass sheet EGS. Instead another glass sheet of the glass unit 3 supports the extension, in this case glass sheet 3b.
Fig. 17 illustrates an embodiment of the present disclosure, wherein the extension 18 is substantially unsupported by the glass unit 3. The extension 18 comprises an attachment part 35 and the extension member 18b. The extension 18 is attached to the movable frame 2a, e.g., as described above in relation to fig 13 by means of the attachment part 35. Hence, one or more fasteners 34 may attach the attachment part 35, and thereby the extension 18, to the to the movable frame 2a profile 2a_bo.
Fig. 17 illustrates a further embodiment of the present disclosure, wherein the extension member 18b comprises an installation guide 36. The installation guide 36 is configured to extend into an indentation, such as a groove or slit, in the bottom profile 2a_bo. This indentation, such as groove or slit, is in fig. 17 provided in the profile 2a_bo surface 2a_bos2 facing away from the first frame opening FO1. In other embodiments, the indentation may be arranged at another location.
In some embodiments, the installation guide 36 may be configured to engage with one or more barbs (not illustrated) of, e.g., the profile 2a_bo. The one or more barbs may help to hold the member comprising the guide 36 in place while attaching and/or manipulating the one or more fasteners 34.
It is understood that in other embodiments, one or more installation guides such as indentation(s), e.g., comprising groves, slits and/or holes, protrusions and/or the like may be arranged at the frame profile 2a and/or at the attachment part 35. This/these is/are configured to assist the user in attaching the extension member 18b as intended to the frame profile and and/or may provide structural strength.
In figs. 13-17, the extension 18, such as the extension body 20 or extension member 18b, overlaps the further structural bottom profile 2b_bo of the fixation frame 2b. This may help to provide water tightening and/or provide aesthetical advantages, e.g., by causing the impression of a larger, exterior surface 3su1 and/or a more aesthetically well integrated extension.
In some embodiments of the present disclosure, the exterior surface 18a of the extension 18 may be substantially identical and/or substantially visually identical to the exterior surface 3su1 of the first projecting glass sheet portion 3p1. The extension body 20, such as a detachable/replaceable extension body 20, or the extension member 18b comprises the surface 18a.
In some embodiments of the present disclosure, the extension body 20 may comprise a glass sheet and/or an exterior glass sheet surface 18a.
The surface 18a may be a high gloss surface that may be obtained by a glass sheet of the extension body 20, so that the surface 18a reminds of, resembles and/or is substantially similar to, the surface characteristic of the exterior surface 3su1.
In some embodiments, such a high gloss surface 18a may also be obtained by a paint, enamel or the like applied onto the extension member 18b, if the extension body 20 is omitted. In other embodiments, the surface 18a may not remind of the surface characteristic of the exterior surface 3su1 of the exterior glass sheet EGS. However, the exterior extension surface 18a may still be substantially flush with the surface 3su1 of the exterior glass sheet EGS. The exterior extension surface 18a is generally visible from the outside EXT of the window 1.
In some embodiments of the present disclosure, first projecting distance DIS1 may be no more than 100 mm, such as no more than 60 mm, such as no more than 30 mm, such as no more than 25 mm.
The distance DIS 1 may be at least 6 mm such as at least 10 mm, such as at least 45 mm.
In some embodiments, the first projecting distance DIS1 may be no more than 55 mm, such as no more than 45 mm, such as no more than 30 mm.
In some embodiments of the present disclosure, the extension distance DIS2 as, e.g., illustrated in figs 13-17 may be at least 6 mm, such as at least 10 mm, such as at least 20 mm or at least 50 mm.
In some embodiments of the present disclosure, the extension distance DIS2 may be no more than 300 mm, such as no more than 200 mm, such as no more than 80 mm or no more than 40 mm.
In some embodiments of the present disclosure, the sum DIS1+DIS2 of the extension distance DIS2 and the first projecting distance DIS1 may be at least 20 mm, such as at least 30 mm, such as at least 60 mm.
In some embodiments of the present disclosure, the sum DIS1+DIS2 of the extension distance DIS2 and the first projecting distance DIS1 may be between 35 mm and 400 mm, such as between 45 mm and 250 mm, such as between 55 mm and 120 mm.
The extension distance DIS2 may in some embodiments of the present disclosure be larger than the first projecting distance DIS1. In some further embodiments hereof, the extension distance DIS2 may be at least 20% larger, such as at least 50% larger, such as at least 100% larger than the first projecting distance DIS1. In some embodiments the extension distance DIS2 may be between 20% and 200% larger than the first projecting distance DIS1, such as between 50% and 100% larger than the first projecting distance DIS1.
In other embodiments, the extension distance DIS2 may be smaller than or substantially equal to the first projecting distance DIS1.
The extension member 18b illustrated in, e.g., figs. 15-17 is provided by a plate/sheet, such as a polymer sheet/plate and/or a metal sheet/plate. The extension member 18b comprises the visible extension surface 18a facing away from the building interior INT and which is subjected to weather such as rain and sunlight when the roof window is installed in the building roof structure 50. The extension member 18b is structural so as to provide or support the structural integrity of the extension 18.
It is generally understood that the extension 18 may comprise an elongated, structural profile 19, 18b, such as a metal profile, providing the structural integrity of the extension 18. In some embodiments hereof, the elongated, structural profile 13, 15, 19, 18b may comprises a metal sheet having a thickness between 0.5 mm and 2 mm, such as between 0.5 mm and 1.3 mm, such as between 0.7 mm and 1.0 mm.
Fig. 18 illustrates an embodiment of the present disclosure wherein the exterior glass sheet EGS, in this case glass sheet 3a, comprises one or more third projecting glass sheet portions 3p3 which projects beyond a side edge 3b_se of the adjacent glass sheet 3b with a second projecting distance DIS3. This in fig. 18 the case at both sides SI1, SI2 of the roof window 1.
The glass unit 3, including a part of the evacuated gap 4, overlaps both side profiles 2a_si of the movable frame 2a placed at opposite sides of the first frame opening FO1. The side edge 3b_se is however terminated before the side edge 3a_se of the exterior glass sheet EGS, 3a is terminated, so that the side of the exterior glass sheet projects with the distance DIS3 beyond the second glass sheet edge 3b_se at the roof window 1 sides SI.
The second projecting distance DIS3 may in embodiments of the present disclosure be at least 5 mm, such as at least 10 mm, such as at least 25 mm, such as at least 40 mm.
In some embodiments of the present disclosure, the second projecting distance DIS3 may be no more than 30 mm, such as no more than 25 mm.
In some embodiments of the present disclosure, the second projecting distance DIS3 is smaller than the first projecting distance DIS1 at the roof window bottom BO.
In other embodiments of the present disclosure, the second projecting distance DIS3 is substantially corresponding to, or larger than, the first projecting distance DIS1 at the roof window bottom BO.
If the roof window 1 is of the centre hung type, the exterior glass sheet EGS may in some embodiments be of a width that is smaller than the minimum frame opening FO2 width of the second frame opening FO2 to allow the glass unit 3 to move through the fixation frame 2b in between the side profiles 2b_si of the fixation frame 2b. If the roof window 1 is of the top hung type, and not center hung, the exterior glass sheet EGS width may in some embodiments be larger than the second frame opening FO2 width. In that case, one or more glass sheets 2a, 2b, such as at least the exterior glass sheet EGS, may overlap the fixation frame side profiles 2b_si. In some embodiments hereof, only a part of the third projecting glass sheet portions 3p3 may overlap the fixation frame side profile(s) 2b_si, whereas one, more or all of the evacuated gap 4, edge sealing 9 and/or second glass sheet 3b may not overlap the fixation frame 2b side profiles 2b_si.
Fig. 18 moreover illustrates the embodiments of elongated side water covers 21a, 21b as previously described. These 21a, 21b overlap the exterior glass sheet EGS surface 3su1.
The side water covers 21a, 21b, in fig. 18 are configured to guide water into a side water channel 38, In the illustrated embodiment, the side water channel 38 is arranged above the projecting portion 3p3 so as to cover a part of that portion 3p3. The side water channel 38 may be attached to the glass unit 3, such as to the exterior glass sheet. This attachment may be provided by means of an adhesive and/or mechanical fasteners (not illustrated)
A first side edge surface 39a of the water covers 21a extends partly towards and/or into (as, e.g., illustrated) the side water channel 38 so as to guide water from the cover 21a into the channel 38.
Side water channels 38 are arranged at each roof window side SI1, SI2. The side water covers 21a, 21b also comprises a further side edge surface 39b that guides the water towards the roof structure and away from the glass unit.
The side water channel(s) 38 may be U-shaped and comprise an elongated recessed portion for guiding water from the side cover(s) 21a, 21b towards the roof window 1 bottom BO. The side water channel(s) 38 may, e.g., comprise a metal sheet material such as an aluminium or steel sheet material.
The side water covers 21a, 21b hence overlap the glass unit 3 and the fixation frame side profiles 2b_si in the width direction WD of the roof window 1.
In fig. 18, the projecting portions 3p3 at a side SI of the roof window are present. In other embodiments of the present disclosure, the projecting portions 3p3 may be omitted.
Fig. 19 illustrates schematically an embodiment of the present disclosure, wherein the exterior glass sheet EGS is smaller than the adjacent glass sheet at the roof window top TO.
In this embodiment, the glass sheet 3b adjacent to the exterior glass sheet 3a EGS, comprises a fourth projecting glass sheet portion 3p4. This fourth projecting glass sheet portion 3p2 projects beyond the edge 3a_te of the exterior glass sheet 3a, EGS at the top TO of the roof window. This causes a step at the top of the glass sheet. A water channel 43 may in some embodiments be arranged at said step and. In other embodiments, such a water channel 43 may be omitted.
A protection sealing 11 may be arranged to cover the edge seal 9 enclosing the evacuated gap 4, and this 11 may be arranged at the step. In fig. 19, the exterior glass sheet does not overlap the edge sealing protection sealing 11. In other embodiments, the edge sealing protection sealing 11 may be arranged between the glass sheets EGS, 3b enclosing the evacuated gap 4 to protect the edge seal 9, see, e.g., fig. 20.
The top cover 24 of the window 1 may overlap the exterior major surface 3su1 and comprise a covering part comprising a covering surface 24a for guiding water towards the exterior glass sheet surface 3su1.This covering part may extend towards the glass sheet surface 3su1.
A top gasket 23, such as a resilient top gasket 23, may provide water tightening at the top TO between the top cover 24 and the glass unit 3. The top gasket 23, such as a rubber or silicone gasket, may be configured to deflect when the movable frame 2a is moved to the closed position (see, e.g., fig. 2A). In fig. 19, the movable frame 2a is in the closed position. In fig. 19, the top gasket 23 comprises lips that abuts the water channel 43 walls. In other embodiments, it 23 may comprise one or more lips or parts that abut a glass unit 3 surface such as the exterior surface 3su1. The gasket 23 may, e.g., be attached to/fixated to the top cover 24. See also fig. 25.
The top cover 24 may comprise a sheet material, such as a metal or polymer sheet material for providing a hard exterior surface/shell of the roof window 1 for mechanical protection and water protection. The top cover 24 may be attached to or integrated in the top frame profile 2b_to of the fixation frame 2b. In fig. 19, the handle 27 comprises a base part 27a extending between the top profile of the fixation frame 2b_to, and the top profile of the movable frame 2a_to. This 27a may be manipulated by means of the gripping part 27b of the handle 27, such as pivoted (not illustrated), to unlock the movable frame from the fixation frame 2b and/or to open the window.
Fig. 20 illustrates schematically a roof window 1 according to embodiments of the present disclosure, where the glass unit 3 comprises a protection sealing 11. See also fig. 6.The protection sealing 11 covers the edge seal 9 that hermetically encloses the evacuated gap 4. The protection sealing 11 is placed between major surfaces 3a1, 3b1 of the first and second glass sheet 3a, 3b. The protection sealing 11 may, e.g., be or comprise a resilient, water tightening sealing, e.g., a butyl sealing 11, a rubber or silicone sealing 11 and/or the like.
In some embodiments, an enamel layer 12 as previously described may be placed between the protection sealing 11 and the glass sheet 3a. This may, e.g., be relevant if the outermost glass sheet 3a that provides a part of the enclosing of the evacuated gap 4 is the exterior glass sheet EGS, which is the case in several embodiments described above, see, e.g., figs. 1-2B and other figures described above.
Fig. 21 illustrates schematically an embodiment of the present disclosure, wherein the exterior surface 3su1 of the vacuum insulated glass unit 3 facing the exterior of the building EXT is configured to be arranged below an exterior plane PL2 defined by/comprising a flashing 22 and/or a roof structure when the roof window 1 is installed in a roof structure 50 of the building.
In fig. 21, the second plane PL2 is defined by the defined by the exterior of the roofing material 51 (see, e.g., fig. 3) and the roof slope. Flashing at the roof window bottom extends over the exterior of the roofing 51 surface 51a so as to guide rain water from the roof window and to the exterior surface 51a of the roofing 51.
The roofing 51 may be attached to a structural roof structure such as comprising roof battens 52.
In some embodiments, the exterior surface 3su1 may be configured to substantially be arranged in/coincide with the exterior plane PL2.
In fig. 21, a cladding member 13 may extend over a part of the fixation frame 2b through one or both planes PL1, PL2, and may comprise a covering part 13b that covers an outer surface of the fixation frame 2b, so as to guide rain water towards the flashing 22 and/or roofing material 51 (see fig. 3).
It is generally understood that the cladding 13 may help to guide rain water from the exterior glass sheet surface 3su1, over the fixation frame 2b and towards the roof structure.
The cladding member is in fig. 21 attached to the glass sheet surface 3a1 of the exterior glass sheet 3b facing towards the interior INT of the building. A seal 46 may be provided to provide water tightness between the cladding member 13 and the glass unit 3. In other embodiments, the cladding member 13 may be attached in other ways to the movable frame 2a, such as to the glass unit, e.g., to the exterior glass sheet EGS surface 3su1.
In fig. 21, the exterior major surface 3a2, 3su1 of the exterior glass sheet EGS is comprised in a first plane PL1. The first plane PL1 is configured to substantially coincide with or be arranged below (as illustrated) a second, exterior plane PL2 defined by a flashing 22 and/or roof structure (51) of the roof window 1 when the roof window is installed in a roof structure (50) of the building.
The first plane PL1 and the second plane PL2 may be configured to be substantially parallel, such as at least when the movable frame 2a of the roof window is in a closed position. Hence, the planes may be arranged with a mutual angle of less than 5°, such as less than 3° or less than 1°.
The first plane PL1 and the second plane PL2 may in some embodiments substantially coincide or be arranged so that the surface 3su1 and the roofing material 51 appears to be substantially flush or aligned.
In various embodiments of the present disclosure, as illustrated in several of the figures described above and/or below, see, e.g., figs. 1-2B and 4-21, the glass unit / vacuum insulated glass unit 3 may comprise just one insulating gap 4 (the evacuated gap) arranged between exterior major surfaces 3su1, 3su2 of the glass unit 3.
Such a vacuum insulated glass unit 3 may have a U_g (U_glazing ) value of below 0.8 W j(m2K), such as below 0.6 W j(m2K), such as below 0.5 W/(m ² K). The U_g (U_glazing ) value of such a unit 3 may be between 0.35-0.7 W/(m ² K), such as between 0.4-0.6 W/(m ² K). The U_g value may be determined at the centre of the glass unit 3 (excluding projecting glass sheets as described in this document)., e.g., the U_g value may be determined at a center portion of the evacuated gap arranged where two diagonally extending lines, which extends between diagonally arranged corner portions of the edge seal
In further embodiments of the present disclosure the vacuum insulated glass unit 3 may comprise a third glass sheet 3d, wherein a a further insulating gap 7 is placed between a first major surface 3d1 of the third glass sheet 3d facing the further insulating gap 7 and a major surface 3b2, 3a2 of a glass sheet 3b, 3a of the vacuum insulated glass unit 3, which major surface faces the further insulating gap 7. Various embodiments of the present disclosure where the glass unit 3 comprises a further heat insulating 7 gap are, e.g., illustrated in figs. 22 and 26-32.
Fig. 22 illustrates an embodiments of the present disclosure wherein the vacuum insulated glass unit 3 comprises a third glass sheet 3d and a further insulating gap 7.
The further insulating gap 7 is placed between a first major surface 3d1 of the third glass sheet 3d, where the surface 3d1 faces the further insulating gap 7, and a major surface 3b2 of another glass sheet of the vacuum insulated glass unit 3 which faces the further insulating gap 7. In fig. 22, the major surface 3b2 of the other glass sheet 3b, 3a of the vacuum insulated glass unit 3 which faces the further insulating gap 7 is a second major surface 3b2 of the second glass sheet 3b which faces away from the evacuated gap 4.
In fig. 22, the evacuated gap 4 provides the outermost heat insulating gap of the glass unit that placed nearest to the exterior EXT of the building. The evacuated gap 4 is placed between the exterior glass sheet EGS and the further insulating gap 7. The further insulating gap 7 is the innermost gap placed nearest to the interior INT of the building.
The second glass sheet 3b is placed between the evacuated gap 4 and the further insulating gap 7. Major, oppositely directed surfaces of the second glass sheet 3b may thus face and, e.g., abut (including low-e coating if present) the further insulating gap 7 and the evacuated gap 4, respectively.
An edge seal 7a enclosed the further insulating gap 7. The edge seal 7a may comprise a primary seal and a secondary seal (not illustrated). The primary seal may be placed more proximate the gap 7a than the secondary seal. The seal 7a enclosing the further insulating gap 7 may comprise one or more of (not illustrated):

One or more desiccants
One or more spacers,
One or more seals, such as comprised in a primary seal, such as comprising one or more portions for preventing or reducing vapor penetration and/or gas loss, such as reducing argon gas loss
One or more seals, such as secondary seals, that is/are configured to keep the glass sheets 3d, 3b2 together, protect the primary seal and/or prevent vapor penetration.

The edge seal 7a may in embodiments of the present disclosure comprise one or more materials and/or a design providing a thermal conductivity of the edge seal 7a below $0.6 \frac{W}{mK}$ such as below $0.4 \frac{W}{mK}$ .
The edge seal 7a may in embodiments of the present disclosure comprise one or more materials and/or a design providing a thermal conductivity of the edge seal 7a below $0.1 \frac{W}{mK}$ such as below $0.05 \frac{W}{mK}$ , such as below $0.02 \frac{W}{mK}$ .
The edge seal 7a may in embodiments of the present disclosure comprise one or more materials and/or a design providing a thermal conductivity of the edge seal 7a between $0,009 \frac{W}{mK}$ and $0.6 \frac{W}{mK}$ , such as between $0.05 \frac{W}{mK}$ and $0.4 \frac{W}{mK}$ .
In fig. 22 and other figures described in more details below, the further insulating gap 7 is placed between the lamination layer 6, 3c and the evacuated gap 4.
The further insulating gap 7 may be a gas filled gap 7, such as a gap 7 comprising argon gas.
The third glass sheet 3d is arranged between the second glass sheet 3b and a lamination layer 6, 3c, such as comprising an interlayer 6, of the lamination layer 6, 3c.
As illustrated in fig. 22, a lamination layer 6, comprising the lamination interlayer, may be attached to a major surface 3d2 of the third glass sheet 3d.
In some embodiments of the present disclosure, one or more low-e coatings 16b is/are arranged at the first major surface 3d1 of the third glass sheet 3d and facing the further gap 7. This low-e 16b coating may (as illustrated) or may not, extend to a position between the edge seal 7a and the glass sheet surface 3d on which it is applied.
It is generally understood that when referring to a glass sheet surface in this document, this surface may also comprise one or more coatings, such as low-e coatings applied thereon, if present.
In some embodiments, one or more further low-e coatings 16a may additionally or alternatively be arranged in the evacuated gap 4, such as at the surface of the second glass sheet 3b facing the evacuated gap 4.
The first projecting glass sheet portion 3p1 may project beyond the bottom edge 3d_be of the third glass sheet 3d with the distance DIS1 .
The glass unit 3 in fig. 22 and some of the figures described below, comprising both an evacuated insulating gap 4 and a further gas filled gap 7 may be referred to as a hybrid VIG unit.
In fig. 22, the bottom edges of the glass sheets 3b, 3d, 3c are substantially aligned so that the firs projecting glass sheet portion extends beyond all three bottom edges, In other embodiments, the bottom edges of the glass sheets 3b, 3d, 3c may be displaced relative to each other so that one or more of the glass sheets 3b, 3d, 3c extends/projects beyond the bottom edge of one or more of the other two glass sheets.
Fig. 23 illustrates an embodiment of the present disclosure, wherein the cladding member 13 comprises a shield 13a, such as comprising a connection part 13a, which overlaps the exterior major surface 3su1 of the first projecting glass sheet portion 3p1 configured to face away from the building interior INT and towards the exterior EXT of the building. The shield 13a, such as the connection part 13a, may be supported by, such as attached 13c to, the exterior major surface 3su1, 3a2 of the first projecting glass sheet portion 3p1 configured to face away from the building interior INT. The connection part 13a may, e.g., be attached to the surface 3su1 by means of one or more adhesives 13c. In additional or alternative embodiments, one or more mechanical means may attach the cladding 13 so that the shield 13a overlaps and protects a part of the projecting portion 3p1.
The shield 13a may extend, e.g., at least 10 mm, such as at least 20 mm or at least 30 mm over the exterior surface 3su1 of the projecting portion 3p1 from the bottom edge 3a_be of the glass sheet EGS. The shield 13a may (not illustrated) or may not (illustrated in fig. 23) extend over the full extend of the first projecting distance DIS1. In fig. 23, the shield 13a extend over about half of the distance DIS1.
In some embodiments, the shield 13a may extend over at least 10%, such as at least 30% or at least 60% of the distance DIS1 from the bottom edge 3a_be.
It is generally understood that the connection part 13a may be unitary with the covering part 13b.
The cladding member 13, such as the shield 13a, may provide mechanical shielding of the first projecting glass sheet portion 3p1. Hence, when hails or the like strikes the projecting glass sheet portion 3p1, it may protect at least a part of the projecting glass sheet portion 3p1.
Fig. 23a illustrates an embodiment of the present disclosure where not the entire shield 13a is attached to the surface 3su1. The shield 13a extends in over the first projecting glass sheet member 3p1, and a sub part of the shield 13a is attached to the surface 3su1 by means of one or more adhesives 13c, in this case at a position distant to the bottom edge 3a_be of the exterior glass sheet EGS. A part of the shield 13a extending from the location of the adhesive 13c and to the covering part 13b extends over the surface 3su1 with a distance to the surface 3su1. This part of the shield is unattached to the surface 3su1 and an air gap is present between the shield 13a and the surface 3su1.
It is generally understood that the adhesive and/or a seal 13c (these may be the same or separate compositions) may provide water tightening preventing water entering in between the glass sheet EGS and the shield 13a. This water tightening may be provided along substantially the entire length of the shield in a direction parallel to the extent of the bottom edge 3a_be of the exterior glass sheet between glass sheet corners.
Fig. 24 illustrates schematically an embodiment of the present disclosure wherein a mechanical holding member 19a, 19b secures the exterior glass sheet EGS at the bottom BO, according to one or more embodiments of the present disclosure.
In fig. 24, the holding member 19a, 19b is part of an extension body support 19, (see also one or more of figs. 13-17). One or more mechanical holding members 19a, 19b may be provided. This/these 19a, 19b is/are configured to secure the exterior glass sheet (3a, 3d, EGS) at the bottom thereof.
The mechanical holding member 19a, 19b comprises a wall 19a placed opposite to the bottom edge 3a_be of the exterior glass sheet EGS - in the illustrated example glass sheet 3a.
The mechanical holding member may in some further embodiments may comprise a hook part 19b, such as a clamping part, extending from the wall 19a to a position opposite to the exterior major surface 3a2, 3su1 of the exterior glass sheet EGS, 3a at the window bottom BO. The hook part 19b and/or wall 19a is configured to secure the exterior glass sheet 3a, EGS at the frame 2, in this case to the movable frame 2a. The hook part 19 may, e.g., provide securing of the glass unit to the frame. In some embodiments the hook part 19b may provide a safer solution in more extreme situations where wind or other forces provides that the vacuum insulated glass unit is pushed or pulled in a direction away from the exterior surface of the vacuum insulated glass unit which faces the exterior of the building, It may provide safety in case of fire and/or the like.
In some embodiments, the holding member 19a, 19b, e.g., comprising the hook part, may also be used for clamping the glass unit towards the frame 2a.
The mechanical holding member 19a, 19b may comprise or be made from metal such as comprising one or more of aluminium, iron or steel. In other embodiments, it may be made from a polymer. The wall 19a and(or holding member may in some embodiments have a thickness between 0.2 mm and 1.5 mm, such as between 0.2 mm and 1.2 mm, such as between 0.3 mm and 0.9 mm.
The bottom edge 3a_be, 3d_be (see, e.g., also figs. 28 and 31, respectively) of the exterior glass sheet 3a, 3d, EGS may be placed at a first side of a holding wall 19a of the mechanical holding member, and the extension 18, such as comprising the extension body 20, may be placed at the opposite side of the holding wall 19a.
Fig. 24 illustrates a further embodiment of the present disclosure wherein the thickness of the extension body 20 is lower/smaller than the thickness of the exterior glass sheet.
The extension body support 19 may hence extend from a position opposite to the bottom edge 3a_be of the exterior glass sheet EGS. This may be provided since the structural strength of the extension body support 19 may be of less importance and/or since the another material than the exterior glass sheet EGS may be used for the extension body 20.
In some embodiments, the extension body 20 may be or comprise a sheet, such as a glass sheet, having a thickness that is at least 10%, such as at least 25% or at least 40% lower than the thickness of the exterior glass sheet EGS and the first projecting glass sheet portion p1s thereof.
In other embodiments, the extension body 20 may have a thickness, such that is identical to the thickness of the exterior glass sheet EGS or larger than the thickness of the exterior glass sheet. This may be accommodated by means of the extension body support, e.g., in order to enable providing that the exterior extension surface 18a is substantially flush with the plane PL1 of the exterior glass sheet EGS surface 3su1.
Fig. 25 illustrates a further embodiment of the present disclosure, wherein the exterior glass sheet EGS comprises a fifth projecting glass sheet portion 3p5 at the top TO of the roof window 1. The fifth projecting glass sheet portion 3p5 projects beyond a top edge 3b_te of the adjacent glass sheet 3b, 3a. The fifth projecting glass sheet portion 3p5 may project beyond the top edge 3b_te of the adjacent glass sheet, in this case sheet 3b, with a third projecting distance DIS4. This projecting distance DIS4 may in some embodiments be less than 60 mm, such as less than 40 mm, such as less than 30 mm.
The third projecting distance DIS4 may be larger than 10 mm, such as larger than 20 mm, such as less than 30 mm.
The third projecting distance DIS4 may be between 10 mm and 60 mm, such as between 20 mm and 40 mm, such as between 25 mm and 35 mm.
As illustrated in fig. 25, the fifth projecting glass sheet portion 3p5 may in some embodiments project beyond the top edge of all other glass sheets of the glass unit 3.
Fig. 25 illustrates a further embodiment of the present disclosure, wherein a gasket 23 of the roof window comprises one or more parts 23a, 23b, such as one or more gasket lips, which support on the first glass sheet 3a. The one or more gasket parts 23a, 23bmay support directly or indirectly on the on the fourth projecting glass sheet portion 3p5. In fig. 25, the one or more gasket parts 23a, 23b abuts the exterior surface 3a2 of the exterior glass sheet EGS at the fourth projecting glass sheet portion 3p5.
It is generally understood that in some embodiments, the exterior glass sheet EGS may comprise one, more or all of the first projecting glass sheet portion 3p1, the third projecting glass sheet portion 3p3 (see, e.g., fig. 18) and/or the fourth projecting glass sheet portion 3p5.
Hence, in some embodiments, the exterior glass sheet EGS may comprise the first projecting glass sheet portion 3p1 and the third projecting glass sheet portion 3p3. Here, the exterior glass sheet may substantially not extend beyond the top edge of the adjacent glass sheet at the top TO.
In other embodiments, the exterior glass sheet EGS may comprise the first projecting glass sheet portion 3p1 at bottom BO and the fifth projecting glass sheet portion 3p5 at top TO. Here the exterior glass sheet EGS may substantially not extend beyond side edges of the adjacent glass sheet at the roof window sides SI1, SI2.
In still further embodiments, the exterior glass sheet EGS may comprise both the first projecting glass sheet portion 3p1 (see, e.g., figs 1-2B and/or other figs described above), the third projecting glass sheet portion 3p3 (see fig. 18) at sides SI1, SI2 and the fifth projecting glass sheet portion 3p5 at the top, see, e.g., fig. 25. Here the exterior glass sheet projects beyond edges of one or more, such as all, glass sheets, or at least the adjacent glass sheet, of the glass unit 3.
In even further embodiments, the exterior glass sheet EGS may comprise the first projecting glass sheet portion 3p1 whereas the projecting portion(s) 3p3 at sides and at top 3p5 may be substantially omitted.
Fig. 26 illustrates schematically an embodiment of the present disclosure, wherein the evacuated gap 4 overlaps an edge seal 7a which encloses the further insulating gap 7 such as a gas filled/containing gap 7. In fig. 26, the evacuated gap 4 fully overlaps the width of the edge seal 7a enclosing the further insulating gap 7.
In other embodiments of the present disclosure, the evacuated gap 4 may only partly overlap the width of the edge seal 7a enclosing the further insulating gap 7, so that the edge seal 9 enclosing the evacuated gap 4 is arranged opposite to the edge seal 7a enclosing the further insulating gap.
In fig. 26, an enamel 12 is arranged at the surface of the exterior glass sheet EGS that faces towards the interior of the building INT and the evacuated gap 4.
Fig. 27 illustrates schematically an embodiment of the present disclosure, wherein the further insulating gap 7 overlaps the edge seal 9 enclosing the evacuated gap 4.
In fig. 27, the further insulating gap 7 fully overlaps the edge seal 9 whereas the edge seal 7a enclosing the further insulating gap 7 is arranged opposite to a protection sealing 11, such as a protection sealing 11 as previously described for protecting the edge seal 9.
The edge seal 9, such as a solder glass or solder metal edge seal, may act as a cold bridge, and providing that the evacuated gap 4 overlaps the edge seal 7a of the further insulating gap 7, and/or providing that the further insulating gap 7 overlaps the edge seal 9 (see, e.g., figs. 26 or 27) may provide reduced heat transfer at the edge region(s) of the of the glass unit 3 thereby reducing negative effects of the cold bride at the seal 9.
Fig. 27 illustrates a further embodiment of the present disclosure, wherein an enamel layer 12 (such as an enamel layer 12 described above) covers a part of the evacuated gap 4 and the further insulating gap 7 at the roof window bottom BO.
Fig. 28 illustrates schematically a further embodiment of the present disclosure, wherein a gripping member 8a extends in between glass sheets of a glass unit comprising both the evacuated gap 4 and a further insulated gap 7 as, e.g., previously described. This is provided at the roof window bottom BO.
In fig. 28, the gripping member 8a extends in between the third glass sheet 3d and the second glass sheet 3b. As the third glass sheet in fig. 28 is proximate the building interior INT the gripping member 8a extends to hold on the surface 3d1 of the third glass sheet 3d which face the further insulating gap 7. The part of the edge seal 7a enclosing the further insulating gap 7 is displaced away from the bottom edge 3d_be of the third glass sheet and the bottom edge of the second glass sheet 3b_be so as to provide a space for the gripping member 8a to extend into to grab the glass sheet 3d.
The lamination layer 6 and the glass sheet 3c may provide further structural strength and provide a stronger holding solution as the lamination layer 6 is attached to the glass sheet which the gripping member 8a engages with.
It is generally understood that in some embodiments of the present disclosure, an adhesive and/or a resilient part (not illustrated in fig. 28, see fig. 29) may be paced between the gripping member 8a and the glass sheet with which it 8a engages.
Fig. 28 illustrates a further embodiment of the present disclosure where the same member comprises both the gripping member 8a and a part of an extension 18 as described according to various embodiments above. The member comprising the gripping part 8a may additionally or alternatively comprise the cladding 13 (not illustrated in fig. 28) and moreover even the covering part 13b of the cladding 13, according to, e.g., embodiments described above.
As illustrated, the member comprising the gripping part 8a may additionally comprise a mechanical holding member 19a, 19b, such as comprising a holding wall 19a, and/or a hook part 19b, which is configured to secure the exterior glass sheet 3a, 3d, EGS at the bottom thereof. Embodiments of such holding member is described above in relation to, e.g., fig. 24.
Fig. 28 moreover illustrates an embodiment of the present disclosure wherein an extension body 20 (such as a body 20 as previously described) is replaceably arranged at an extension body support 19. For example, it 20 may be attached to the extension body support 19 by means of one or more fasteners 25a, 25b, such as mechanical fasteners. The extension body may hence in some embodiments be replaced without replacing the support 19.
In fig. 28, the fastener comprises one or more adjustable parts 25b, such as a screw,. This adjustable part 25b may be manipulated in order to, e.g., enable removal a the extension body 20 in order to, e.g., replace this 20 with a another extension body. This replacing of the extension body may, e.g., be provided to

change visual impression, such as change colour, glossiness, material and/or the like provided by the extension body 20,
to replace a broken/damaged extension body,
to replace a malfunctioning, functional extension body
to install a functional extension body replacing a dummy extension body, and/or
to upgrade a functional extension body.

The adjustable part 25b may in some embodiments press the extension body 20 towards a wall 25b (in this embodiment the wall 25b is comprised in the member comprising the extension body support 19), and thereby secure it and/or maintain it in place.
In some embodiments, one or more of the one or more fasteners 25a, 25b, such as mechanical fasteners, may comprise one or more of one or more clips, one or more clamps, one or more pop rivets, one or more spring loaded holding members, one or more screws, one or more fixed walls 25a and/or the like.
In some embodiments, the extension body 20 may additionally or alternatively comprise a holding interface (such as comprising, e.g., one or more recesses or protrusions) configured to engage with the one or more fasteners 25a, 25b.
The one or more fasteners 25a, 25b may in some embodiments be adjustable in order to enable receiving/holding extension bodies 20 of different thicknesses, design and/or the like, and still provide adjustment features enabling that the extension body 20 surface 18a may be adjusted to be substantially flush with the surface 3su1 after installation.
Fig. 28 illustrates a still further embodiment of the present disclosure, wherein the extension 18 comprises an enamel layer 12. This layer 12 may be attached to or integrated in the extension body 20 or may be attached to the extension body support 19. In some embodiments, the extension body 20 may comprise the enamel layer 12, and the enamel layer may be visible through the surface 18a of the extension body 20 from the exterior EXT. In some embodiments, the enamel 12 of the extension may be similar to an enamel layer 12 covering a part of the first projecting glass sheet portion 3p1 as, e.g., previously described.
Figs. 29-31 illustrates schematically various embodiments of the present disclosure, wherein the further insulating gap 7, such as a gas filled gap, is the gap of the vacuum insulated glass unit 3 that is configured to be placed proximate the building exterior EXT. The third glass sheet 3d is the exterior glass sheet EGS and comprises the first projecting glass sheet portion 3p1. The evacuated gap 4 is in figs. 29-31 placed between the further insulating gap 7 and a lamination layer 6, 3c, between glass sheets 3a, 3b. The evacuated gap 4 is in figs. 29-31 the insulating gap of the two insulating gaps 4, 7 of the glass unit 3 that is placed proximate the building interior when the movable frame 2a is in a closed position.
In fig. 29, a gripping member 8a as, e.g., described above extends in between the exterior glass sheet EGS, 3d, and the first glass sheet 3a, which is placed adjacent to the exterior glass sheet EGS. The further insulating gap 7 is placed between the exterior glass sheet and the first glass sheet. Hence, the first and second glass sheets 3a, 3b enclosing the evacuated gap 4, (and optionally also the lamination layer 6, 3c), may be placed between the gripping member 8a and the bottom profile 2a_bo of the movable frame 2a.
As illustrated in figs. 28 and 29, the gripping member 8a may be a part, such as an integrated part, of a member 8 that is attached to the movable frame 2a by means of, e.g., one or more mechanical fasteners 34, for example as described above in relation to, e.g., fig. 13 and/or fig. 17. In some embodiments, the member 8 and/or the profile 2a_bo may also comprise a guide 36 (not illustrated in fig. 29) as, e.g., described above, such as in relation to, e.g., fig. 13 and/or fig. 17. In some embodiments the guide may be omitted.
Figs. 28-29 moreover illustrates embodiments of the present disclosure wherein the edge seal 9 which encloses the evacuated gap 4 overlaps an edge seal 7a which encloses the further insulating gap 7. In fig. 28 it 9 partly overlaps the edge seal 7a whereas in fig. 29, it 9 fully overlaps the edge seal 7a.
Fig. 30 illustrates schematically an embodiment of the present disclosure, where the roof window 1 comprises a glass unit 3 comprising the evacuated gap 4 and the further insulating gap 7.
In fig. 30, the further gap 7 overlaps the edge seal 9 enclosing the evacuated gap 4. The further gap 7 moreover extends beyond the bottom edge 3b_be of the second glass sheet 3b which comprises the surface 3b1 that faces the evacuated gap 4 and provides a part of the enclosing of the evacuated gap 4. The second glass sheet 3b is placed closer to the building interior INT than the first glass sheet 3a.
The first glass sheet 3a is placed between the exterior glass sheet EGS and the second glass sheet 3b. The second glass sheet 2a is placed between the lamination layer 6, 3a and the evacuated gap 4. The evacuated gap 4 is placed between the first glass sheet 3a and the second glass sheet 3b.
Exterior glass sheet EGS, which in fig. 30 is the third class sheet 3d, comprises the first projecting glass sheet portion 3p1 that projects beyond the bottom edge 3b_be of the second glass sheet 3b.
The first glass sheet 3a also comprises a projecting glass sheet portion that projects beyond the bottom edge 3b_be of the second glass sheet 3b.
As illustrated, in some embodiments of the present disclosure, the first glass sheet 3a may project beyond the bottom edge 3b_be of the second glass sheet 3b with a distance substantially corresponding to the distance DIS1 with which the exterior glass sheet EGS projects beyond the bottom edge 2b_bo of the second glass sheet.
In fig. 30, both the first glass sheet 3a and the exterior glass sheet EGS (third glass sheet) 3d, extends beyond the bottom edge 3b_be of the second glass sheet 3b. In some embodiments (not illustrated in fig. 30, see, e.g., fig. 4) the bottom edge of the second glass sheet 3b may project beyond the lamination layer 6, 3c.
In some embodiments, the further insulated (e.g. gas filled) gap 7, may project at least 10 mm, such as at least 20 mm, such as at least 30 mm or at least 40 mm beyond the bottom edge 3b_be of the second glass sheet.
In some embodiments, the further insulated (e.g. gas filled) gap 7, may project between 10 mm and 200 mm, such as between 20 and 100 mm, such as between 25 mm and 50 mm beyond the bottom edge 3b_be of the second glass sheet.
In some embodiments, the further insulated (e.g. gas filled) gap 7 may project no more than 30 mm, such as no more than 25 mm beyond the bottom edge 3b_be of the second glass sheet.
The evacuated gap 4 may as illustrated, in some embodiments overlap the movable frame bottom profile. The evacuated gap 4 may however in some embodiments not overlap the full width (see W1 in fig. 1) of the bottom profile 2a_bo. In other embodiments, the evacuated gap 4 may overlap the full width (see W1 in fig. 1) of the bottom profile 2a_bo, see
In fig. 30, the further gap 7 overlaps the full width (see, e.g., W1 of fig. 1) of the bottom frame profile 2a_bo of the movable frame 2a, and projects beyond the surface side of the profile 2a_bo that faces away from the first frame opening FO1.
As can be seen in fig. 30, in some embodiments, the further insulating gap 7 may extend to a position opposite the fixation frame bottom profile 2b_bo. In other embodiments, the gap 7 may not extend to a position opposite the fixation frame bottom profile 2b_bo.
In fig. 30, the first projecting glass sheet portion 3p1 of the exterior glass sheet EGS, which provides a part of the enclosing of the further insulating gap 7, does not project beyond the bottom edge 3a_be of the first glass sheet 3a. The first glass sheet provides both a part of the enclosing of both the evacuated gap 4 and the further insulating gap 7, and is placed between the further insulating gap 7 and the evacuated gap 4. In other embodiments, The first projecting glass sheet portion 3p1 may however project beyond the bottom edge 3a_be of the first glass sheet 3a, see fig. 39.
Fig. 30 moreover illustrates an embodiment of the present disclosure, wherein an enamel layer 12 is arranged at the major surface of the exterior glass sheet EGS which faces the further insulating gap 7.
Fig. 30 moreover illustrates a further embodiment of the present disclosure, wherein a cladding member 13 comprising a covering part 13b is provided. The cladding member 13 may in embodiments be provided as, e.g., described above, e.g., in relation to varios embodiments of the present disclosure. The cladding member 13 comprises a connection part 13a, which overlaps the exterior major surface 3su1 of the exterior glass sheet EGS that is configured to face away from the building interior INT and towards the exterior EXT of the building. The connection part 13a may be attached to the glass unit surface 3su1 by means of one or more adhesives 13c, see also description relating to figs. 23-23a.
Fig. 31 illustrates schematically an embodiment of a roof window, wherein the further insulating gap 7 is placed proximate the building exterior EXT. The third glass sheet 3d is the exterior glass sheet EGS and comprises the first projecting glass sheet portion 3p1. The evacuated gap 4 is placed between the further insulating gap 7 and a lamination layer 6, 3c.
In fig. 31, the first projecting glass sheet portion 3p1 extends beyond both the bottom edge 3a_be of the first glass sheet 3a and the bottom edge 3b_be of the second glass sheet 3b. The first glass sheet 3a is placed between the exterior glass sheet EGS and the second glass sheet 3b. The second glass sheet 2a is placed between the lamination layer 6, 3a and the evacuated gap 4. The evacuated gap 4 is placed between the first glass sheet 3a and the second glass sheet 3b.
Fig. 31 illustrates a further embodiment of the present disclosure, wherein an extension 18 provided. In fig. 31, the extension 18 comprises an extension body 20 and an extension body support 19, e.g., as described according to various embodiments. The extension 18 may generally comprise one or more of the features as described above, for example as described in relation to one or more of figs. 13-17, 24 and/or 28. Hence, in some embodiments, the extension body 20 may be omitted. See, e.g., fig. 15, 16 or 17. The extension 18 is arranged in continuation of the exterior glass sheet EGS, 3d. The extension body 20 may, e.g., be replaceable as for example described above in relation to fig. 28.
Fig. 32 illustrates schematically an embodiment of the present disclosure wherein the exterior glass sheet EGS is displaced towards the bottom BO of the roof window to provide the first projecting glass sheet portion 3p1. At the roof window top TO, the second glass sheet 3b projects beyond the top edge 3a_te of the exterior glass sheet EGS, e.g., as described in relation to fig. 19. It is understood that in other embodiments, the exterior glass sheet EGS may be longer than the second glass sheet 3b and have a top edge 3a_te that either is substantially flush with the top edge 3b_te of the second glass sheet 3b (indicated in fig. 1) or extends beyond the top edge 3b_te of the second glass sheet, e.g., as described in relation to fig. 25.
Fig. 33 illustrates schematically a roof window according to embodiments of the present disclosure, installed in a building roof structure 50, seen from the outside. See also description above relating to, e.g., fig. 3. The roof window comprises an extension 18 at the roof window 1 bottom BO as, e.g., described in relation to various embodiments described above. In this embodiment, the extension comprises an extension body 20, but in other embodiments, an extension member 18b as, e.g., illustrated in figs 15, 16 or 17 may be provided instead. The hook part 19b and holding wall 19a are visible in fig. 33. See, e.g., description relating to one or more of figs. 24, 28 or 31. Also fasteners 25a for holing the extension body 20 are illustrated. The extension body support 19 described above may comprise the hook part 19b and holding wall 19a and/or the fastener 20a. In fig. 33, two hook parts 19b and fasteners 25a are illustrated as being discretely arranged at the holding wall along the width direction WD of the roof window 1. More or less than two hook parts 19b and/or fasteners 25a may be provided in other embodiments. In further embodiments (not illustrated) a single elongated hook part 19b and/or fastener 25a may be provided and extend along at least 80%, at least 90% or substantially along the full width of the glass unit 3, in the width direction.
Dash-dotted line referred to as 2a indicates the surface of the bottom profile 2a_bo of the movable frame that faces and abuts the first frame opening, and dashed line referred to with 3b_be indicates the bottom edge of the second glass sheet 3b beyond which the first projecting glass sheet portion 3p1 projects.
Fig. 34 illustrates schematically an embodiment of the present disclosure wherein the first projecting glass sheet portion 3p1 does not extend beyond the surface 2a_bos2 of the bottom profile 2a_bo of the movable frame 2a that faces the fixation frame 2b. Instead, an extension 18 as, e.g., preciously described, in relation to one or more of figs 13-17, 24, 28 and/or 31 provides an overlap of the fixation frame 2b.
Fig. 34 moreover illustrates an embodiment of the present disclosure wherein the extension body support 19 comprises a recessed portion into which the extension body 20 extends. Also at the bottom of the extension body 20, a wall of the extension body support 19 extends to a position opposite a bottom edge of the body 20, which bottom edge is arranged distant to the bottom edge of the exterior glass sheet EGS. The covering part 13b of the cladding 13 extends from a position opposite or proximate the bottom part of the extension body 20.
Fig. 35 illustrates a vacuum insulated glass unit 3 according to embodiments of the present disclosure, seen towards the exterior surface 3su1. The roof window 1 frame is omitted to improve understanding. The first projecting glass sheet portion 3p1 is indicated in fig. 35. The enamel 12 overlaps the edge seal 9 enclosing the evacuated gap 4 (see, e.g., fig. 1). However, the enamel 12 may as illustrated be terminated before reaching a support structure 5 so that no support structure supports on the enamel 12. In other embodiments, support structures 5 may support on the enamel 12. The enamel 12 is indicated by dash-dotted hatch lines in fig. 35. The enamel 12 extends from the bottom edge 3a_be of the exterior glass sheet EGS and covers substantially the entire surface of the projecting glass sheet portion 3p1 from the bottom edge 3a_be.
It is generally understood that in various embodiments of the present disclosure, as illustrated in several of the figures described above, see, e.g., figs. 1-2B and 4-21, the glass unit / vacuum insulated glass unit 3 may comprise just one insulating gap 4 (the evacuated gap) arranged between exterior major surfaces 3su1, 3su2 of the glass unit 3. Such a singe gap 4 vacuum insulated glass unit 3 may have a U_g (U_glazing ) value of below 0.8 W/(m ² K), such as below 0.6 W j(m2K), such as below 0.5 W/(m ² K). The U_g (U_glazing ) value of such a singe gap 4 unit 3 may be between 0.35-0.7 W/(m ² K), such as between 0.4-0.6 W/(m ² K).
In other embodiments of the present disclosure, as illustrated in several of the figures described above, see, e.g., figs. 22-32 1-2B and 4-21, the glass unit / vacuum insulated glass unit 3 may comprise the evacuated gap 4 and a further insulating gap such as a gas filled gap 7, such as a gap 7 containing argon. Such a vacuum insulated glass unit 3 comprising the gaps 7, 4 may have a U_g (U_glazing ) value of below 0.5 W/(m ² K), such as below 0.4 W/(m ² K), such as below 0.3 W/(m ² K). The U_g (U_glazing ) value of such a unit 3 may be between 0.2-0.5 W/(m ² K), such as between 0.25-0.4 W/(m ² K).
The U_g value may be determined at the centre portion CEGU of the glass unit 3, The centre portion CEGU of the glass unit 3 may be the location of the evacuated gap arranged where two diagonally extending lines 49a, 49b, which extends between diagonally arranged corner portions of the edge seal 9, intersect.
Fig. 36 illustrates an embodiment of the present disclosure, wherein the step support 15 comprises a mechanical holding member 19a, 19b. The mechanical holding member comprises a holding wall 19a, 19b, which is configured to secure the exterior glass sheet 3a, EGS at the bottom thereof. The mechanical holding member comprises a wall (19a) placed opposite to, such as next to, the bottom edge 3a_be exterior glass sheet 3a, EGS. The mechanical holding member may moreover comprise a hook part 19b extending to a position opposite to the exterior major surface 3a2, 3su1of the exterior glass sheet EGS, 3a. See, e.g., also refs. 19a-19b described above in relation to various embodiments of the present disclosure. In fig. 36, the step support 15 comprises a member that is attached to the movable frame 2a bottom profile, e.g., by means of one or more mechanical fasteners 34 as, e.g., described above.
In fig. 36, the step support 15 also comprises the cladding 13 comprising the covering part 13b. The step support and the cladding member 13 are in fig. 36 integrated in the same member.
It is generally understood that in one or more embodiments of the present disclosure, the glass unit 3, including the first projecting glass sheet portion 3p1 as described above and/or below according to various embodiments of the present disclosure, may extend over the entire width W1 (see fig. 1) of the bottom profile 2a_bo, and over at least 20%, such as over at least 50%, such as over at least 80% or over at least 90% of the width W2 (see fig. 1) of the bottom profile 2b_bo of the fixation frame 2b.
Fig. 37 illustrates schematically and in perspective a roof window 1 according to embodiments of the present disclosure. Here, the roof window is of the centre hung type, The movable frame 2a is configured to move, such as pivot, relative to the fixation frame 2b by means of one or more hinges 60, and the vacuum insulated glass unit 3 is attached to the movable frame 2a and is configured to move together with the movable frame 2a.
Fig. 37 moreover illustrates a fixation frame according to embodiments of the present disclosure, comprising a longitudinal, structural top profile 2b_to, a longitudinal, structural bottom profile 2b_bo, and two longitudinal, structural side profiles 2b_si. The longitudinal directions of the top and bottom profiles are parallel. The longitudinal directions of the side profiles are parallel. The longitudinal direction of the side profiles of the fixation frame 2b are substantially perpendicular to the longitudinal directions of the top and bottom profiles of the fixation frame.
Fig. 37 moreover illustrates a movable frame 2a according to embodiments of the present disclosure, comprising a longitudinal, structural top profile 2a_to, a longitudinal, structural bottom profile 2a_bo, and two longitudinal, structural side profiles 2a_si. The longitudinal directions of the top and bottom profiles are parallel. The longitudinal directions of the side profiles are parallel. The longitudinal direction of the side profiles of the movable frame 2a are substantially perpendicular to the longitudinal directions of the top and bottom profiles of the movable frame 2a.. Hinges 60 interconnects the side profiles 2a_bo, 2b_bo and provides a rotation axis RAX that may be substantially horizontal. The rotation axis RAX is arranged between the top and bottom profiles and is substantially parallel to the longitudinal direction of these profiles. The centre hung roof window in fig. 37 may in some embodiments be top hung. In that case, the hinges 60 may comprise, or be connected, to arms extending to a top hinge (not illustrated) arranged at the roof window top TO. In other embodiments, the centre hung roof window in fig. 37 may not be top hung.
Fig. 38 illustrates schematically a bottom BO part of a roof window according to embodiments of the present disclosure. Here, a step support 15 as, e.g., described above, is provided. The step support 15 comprises an attachment part 35 as, e.g., described previously. This attachment part 35, such as a plate and/or a bracket/mounting, is attached to the frame profile 2a_bo by means of the one or more mechanical fasteners 34. This attachment is provided at the surface 2a_bos2 side of the bottom frame profile 2a_bo of the movable frame 2a that faces the fixation frame bottom profile 2b_bo and faces away from the first frame opening FO1.
Fig. 38 moreover illustrates an embodiment of the present disclosure, wherein the step support in fig. 38 is a plate member 15 that is attached by means of adhesive 33a, 33b to the first projecting glass sheet portion 3p1. This may in some embodiments be provide by means of a first adhesive type 33a and a second adhesive type 33b.
In fig. 38, two adhesives of the second adhesive type 33b is placed between two adhesives of the first adhesive type 34a. It is understood that in other embodiments, more or less than two of the first adhesive type 33a may be used. It is also understood that in some embodiments, more or less than two of the second adhesive type 33b may be used.
In some embodiments, the first adhesive type 33a may be or comprise a glue, and the second adhesive type 33b may be or comprise an adhesive tape. In some embodiments, the second adhesive type 33b may be or comprise a glue, and the first adhesive type 33b may be or comprise a glue. In some embodiments, both adhesives 33a, 33b may comprise a tape or a glue.
The adhesive(s) 33a, 33b may or may not provide support elevations 17 as described above.
In some embodiments, combination of a tape and a glue may be provided as the first and second adhesive typers 33a, 33b. This may, e.g., provide manufacturing advantages. The glue may be the primary adhesive, and may be used even though it has a longer curing time. While it cures, the tape may provide initial sufficient (and in some cases secondary) attachment. In fig. 38 and several of the figures described above, no mechanical holding means extend to hold on the exterior glass sheet EGS and/or another glass sheet at the bottom. In other embodiments of the present disclosure, as, e.g., illustrated in one or more of figs. 5, 24,28, 29 31, 33-34, 36, mechanical holding 8, 8a, 19a, 19b may additionally or alternatively be provided at the bottom part of the glass unit 3 so as to mechanically fixate the glass unit 3a to the movable frame 2a. Such mechanical holding means may also be integrated in the member 13a, 15.
Fig. 38 illustrates a still further embodiment wherein the covering part 13b of the cladding extends through the second plane PL2 that comprises the exterior of the roofing material 51.
Fig. 39 illustrates schematically an embodiment of the present disclosure, wherein the glass unit comprises an evacuated gap 4 and a further insulating gap 7, such as a gas filled gap, as, e.g., described above. The further gap 7 is a gas filled insulating gap, and is placed closer to the exterior EXT than the evacuated gap 4, when the movable frame is in a closed position. The exterior glass sheet EGS is hence provided by the third glass sheet 3d that comprises the major surface 3d1 facing the further gap, and comprises the surface that provides the major exterior glass unit 3 surface 3su1 that faces the exterior EXT. In fig. 39, the distance DIS1 with which the exterior glass sheet EGS projects beyond the bottom edge 3b_be of the second glass sheet 3b is larger than the distance with which the first glass sheet 3a projects beyond the bottom edge 3b_be of the second glass sheet 3b. Both the first projecting glass sheet portion 3p1 of the third (exterior EGS) glass sheets 3d and the first glass sheet 3a extends beyond the bottom edge 3b_be of the second glass sheet 3b. The first projecting glass sheet portion 3p1 moreover projects beyond the edge seal 7a enclosing the further insulating gap.
In other embodiments, see, e.g., fig. 29, the first glass sheet 3a providing a part of the enclosing of the evacuated gap 4 may not project beyond the bottom edge 3b_be of the second glass sheet 3b that provides a part of the enclosing of the evacuated gap 4 and is placed at the other side of the evacuated gap 4.
The further, insulating gap 7 may fully (as illustrated), or partly (not illustrated in fig. 38), overlap the edge seal 9a enclosing the evacuated gap 4.
Figs. 40, 41 and 42 illustrates schematically a cross section of a roof window bottom BO according to embodiments of the present disclosure, comprising an extension 18.
Here, the bottom edge 3a_be of the exterior glass sheet EGS is retracted relative to the bottom edge 3b_be of the adjacent glass sheet 3b. The evacuated gap 4 is in figs. 40-41 arranged between these glass sheets 3a, 3b. In figs. 40-42, the glass sheet adjacent to the exterior glass sheet EGS, in this case glass sheet 3b, comprises a projecting glass sheet portion 3p6 which projects beyond the bottom edge 3a_be of the exterior glass sheet EGS, 3a. The edge seal 9, such as a rigid solder material edge seal as, e.g., previously described, seals the evacuated gap 4 and is arranged between parts of the major surfaces 3a1, 3b1 of the glass sheets 3a, 3b that faces the evacuated gap 4. Both in figs. 40, 41 and 42, An extension 18 overlaps the projecting glass sheet portion 3p6 at the surface 3b1 side of the glass sheet 3b that faces towards the exterior EXT of the building. The extension 18 is arranged in continuation of the bottom of the exterior glass sheet 3a, 3d, EGS and extends with an extension distance DIS2. It is understood that the extension 18 may, e.g., comprise an extension as described in relation to one or more figures described above and/or below. The exterior surface 18a of the extension 18 is configured to be visible from the exterior EXT of the building.
In figs. 40 - 42, the extension 18 extends beyond the bottom edge 3b_be of the second glass sheet 3b, and overlaps the bottom profile 2b_bo of the fixation frame 2b.
The extension 18 comprises a member 18b, 19 which is attached to the projecting glass sheet portion 3p6, in the illustrated embodiments by means of an adhesive 80. In figs 40-41, this provides that the extension 18 is mainly, such as fully carried by the projecting glass sheet portion 3p6 and thereby by the glass unit 3.
The adhesive 80 may in embodiments of the present disclosure comprise one or more of tape and/or glue, e.g., just a glue, just an adhesive tape, or a combination of glue and tape. The adhesive 80 may also provide water tightening.
In some embodiments (not illustrated) - a connection interface may be provided at the glass unit 3 and which is configured to facilitate mechanical and/or adhesive 80 attachment of the extension at the glass unit.
In fig. 40, the extension 18 comprises an extension member 18b provided by a plate/sheet. For example a metal sheet/plate, e.g., comprising one or more of aluminium, iron or steel, and/or a polymer sheet/plate. Various embodiments of the extension member 18b are described in more details above, e.g., in relation to, e.g., figs 15-17.
In Fig. 41, the extension 18 comprises an extension body 20 which is supported by, such as carried by, the extension body support 19. The extension body 20 comprises the exterior, visible surface 18a that is to face the exterior EXT of the building after roof window installation in a roof structure 50. The extension body 20 is attached to the extension body support 19. Various embodiments of the extension body support 19, the extension body 20 and/or the like, according to embodiments of the present disclosure, are described in more details above, e.g., in relation to figs. 13-14, 24, 28, 31, 34.
Fig. 40 illustrates a further embodiment of the present disclosure where the extension 18 provides/comprises the cladding 13. Here, the cladding 13 comprises a part that is connected/attached to the extension member 18b and comprises the surface 18a. The surface 18a may or may not be provided by means of, e.g., a coated surface. The cladding 13 comprises a connection member 13a that mechanically engages with, and is thereby attached to, an engagement part of the extension 18 member 18b. Additionally or alternatively, it 13a may be attached to an engagement part of the extension 18 by means of an adhesive (not illustrated). In other embodiments, the cladding and the extension member 18b may be unitary as, e.g., illustrated in figs 15-17.
Fig. 41 illustrates an embodiment of the present disclosure where the cladding 13 is unitary with the extension body 20 support 19.
Fig. 41 moreover illustrates an embodiment where the support 19 comprises a wall part 19a extending opposite to the bottom edge 3a_be surface of the exterior glass sheet EGS, and a part 19b, such as a hook part, that extends over the exterior surface 3su1 of the exterior glass sheet. See also fig. 31, 33 and 42 and description relating thereto. This may, e.g., provide enhanced safety and/or water tightening. Mechanical safety may be further improved if the support 19 is fastened, such as mechanically fastened, to the movable frame 2a. See, e.g., fig. 31 or 42. It is understood that wall 19a and/or hook 19b also may be omitted in other embodiments of the present disclosure.
In addition or as an alternative to the adhesive 80, mechanical fastening to one or more glass sheets of the glass unit 3 and/or the movable frame 2a may be provided. This is not the case in figs. 40-41, but mechanical fastening of the extension to the movable frame is illustrated in fig. 42. It is understood that the mechanical fastening to the movable frame 2a may comprise use of one or more screws, nails, clips, clamps and/or pop rivets 34. In Fig. 42 mechanical fastening to the movable frame 2a is provided by means of an attachment part 35 connected to or integrated in the support 19 (or member 18b if extension body 20 is not present), and by means of adhesive and/or mechanical fastener(s) 34. The mechanical attachment of extension 18 to the movable frame may, e.g., be provided as illustrated in, and described above, in relation to, figs. 13 and/or 36, e.g., by means of attachment part 35. The mechanical fastening may additionally enable providing a further safety measure if the extension comprises the wall 19a opposite the bottom edge surface of the exterior glass sheet EGS or even a hook part 19b as previously described. In fig. 42, the extension comprises a supported extension body 20, but it is understood that a connection solution for attaching the extension 18 to the movable frame 2a may also be provided in embodiments where the extension member 18b (plate) is used instead of an extension body 20 supported by an extension body support 19.
It is generally understood that in some embodiments of the present disclosure, the extension distance DIS2 as, e.g., illustrated in fig. 40 and/or 41 and/or in other figures described further above may be at least 6 mm, such as at least 10 mm, such as at least 20 mm or at least 50 mm. In some embodiments of the present disclosure, the extension distance DIS2 may be no more than 300 mm, such as no more than 200 mm, such as no more than 80 mm or no more than 40 mm. The extension distance DIS2 may be defined from the part of the extension 18 arranged proximate the exterior glass sheet EGS bottom edge (edge 3a_be in figs 41-42).
In some embodiments, the extension distance DIS2 may be defined from the part of the extension 18 arranged proximate the exterior glass sheet EGS bottom edge and to the cladding 13.
In the embodiments where the extension 18 comprises an extension body 20, the extension distance DIS2 may be defined from the part of the extension body 20 arranged proximate the exterior glass sheet's EGS bottom edge (, e.g., 3a_be or 3d_be) and to the part of the extension body 20 distant to the exterior glass sheet's bottom edge 3a_be where the extension body 20 terminates. This may correspond to the height of the extension body 20.
Fig. 43 illustrates a roof window comprising an extension 18 at the roof window bottom, according to embodiments of the present disclosure.
It is generally understood that in some embodiments of the present disclosure, the extension surface 18a may vary with no more than ±5 mm, such as no more than ±3 mm, such as no more than ± 1 mm from the plane PL1. This may, e.g., be provided over at least 1 cm, such as at least 3 cm or at least 5 cm, of the surface 18a from the exterior glass sheet bottom edge 3a_be surface, and/or it may be the case for substantially the entire surface 18a of the extension.
In some embodiments of the present disclosure, the exterior, visible surface 18a of the extension 18 may be arranged with a distance of less than 8 mm, such as less than 5 mm, such as less than 2 mm, from the plane PL1 comprising the exterior major surface 3su1 of the exterior glass sheet EGS of the vacuum insulated glass unit 3.
This may in some embodiments be the case for substantially the entire surface 18a of the extension.
In some embodiments of the present disclosure, the exterior, visible surface 18a of the extension 18 may be substantially flush with the exterior surface 3su1 of the exterior glass sheet EGS, 3a, 3d, at least proximate a bottom edge 3a_be, 3d_be of the exterior glass sheet EGS.
In some embodiments of the present disclosure, the majority of, or all of, the exterior, visible surface 18a of the extension 18 may be substantially flush with the exterior surface 3su1 of the exterior glass sheet EGS, 3a, 3d, at least proximate a bottom edge 3a_be, 3d_be of the exterior glass sheet EGS. This is illustrated in fig. 43, where the visible extension surface 18a substantially coincides with the plane PL1 comprising the exterior major surface 3su1.
In some embodiments of the present disclosure, the exterior, visible surface 18a of the extension 18 may be arranged below the plane PL1 comprising the exterior major surface 3su1 of the exterior glass sheet EGS of the vacuum insulated glass unit 3, at least proximate the bottom edge 3a_be (or 3d_be) of the exterior glass sheet EGS, 3a, 3d. This may be provided in order to reduce or avoid water to be captured at a the transition between the extension 18 and the exterior glass sheet. Alternatively, an overlapping part (not illustrated) may overlap the surfaces 3su1, 18a and hence guide water from surface 3su1 to extension surface 18a, and hereby allow the surface 18a to be placed higher than the plane PL1, also proximate the glass sheet EGS.
In some embodiments, the extension surface 18a may be substantially parallel with the glass unit plane PL1 as illustrated in fig. 43 and several other figures described above. It 18a may or may not in this embodiment be flush with the surface.
In some embodiments, however, the extension surface 18a may not be parallel with the glass sheet EGS surface 3su1, but may be arranged with an angle an1 (see fig. 43) to the plane PL1. In some embodiments, this angle an1 may be within ± 5°, such as within ± 3°, such as within ± 1°, relative to the plane PL1 comprising the exterior surface 3su1 of the exterior glass sheet EGS. This may be acceptable since a roof pitch at the building roof structure where the roof window 1 is installed may result in an installation angle of the roof window 1 that causes rain water to be guided away from the roof window and the extension due to gravity.
The surface of the extension 18a may be substantially plane. Alternatively, it may comprise a slight curvature (not illustrated), such as a convex curvature in the direction away from the bottom edge of the exterior glass sheet EGS.
It is generally understood that, e.g., the distance DIS1 and/or DIS2 as described above may extend substantially in the height direction HD (see, e.g., fig. 3 and 33) of the roof window 1.
It is generally understood that, e.g., the distance DIS1 and/or DIS2 as described above may extend substantially parallel to the longitudinal direction (between top and bottom of glass unit) of the side edges 3a_se, 3b_se of the glass sheets of the vacuum insulated glass unit (see, e.g., fig. 18 and 33) of the roof window 1.
As illustrated in various figures described above and/or below, see, e.g., the various embodiments illustrated in figs. 1-2A, 4-17, 22, 23, the cladding member 13 may comprise a connection part 13a which extends in between the first projecting glass sheet portion 3p1 and a bottom frame profile 2b_bo of the fixation frame 2b. The connection part 13a may here comprise a part, such as a bracket or plate that is fixated to the glass unit. For example, it 13a may be attached to a surface of the first projecting glass sheet portion 3p1 that faces the building interior and/or a profile 2b_bo of the fixation frame, or may be attached to another glass sheet of the glass unit. For example as illustrated in fig. 15 or 16. Additionally or alternatively, the connection part 13a may comprise a part, such as a bracket or plate, that is fixated directly or indirectly to the movable frame 2a (see, e.g., fig. 12, 13 or 17 or 34), such as to the bottom frame profile 2a_bo, by means of one or more fasteners, such as one or more mechanical fasteners 34. An installation guide 36 may or may not be provided.
Various embodiments of the cladding member 13, step support (s) 15, 15a, 15 and projection 18 are described above according to various embodiments of the present disclosure.
Generally it is to be understood that the same member, such as an elongated profile, may comprise one, more than one, or all of:

the extension 18, such as comprising an extension body support 19 supporting an extension body 20, or an extension member 18b, as disclosed according to various embodiments of the present disclosure described above and/or illustrated in the figures,
the/a cladding member 13 comprising the covering part 13b as disclosed according to various embodiments of the present disclosure described above and/or illustrated in the figures and/or
one or more or more step support(s) 15, 15a, 15b as disclosed according to various embodiments of the present disclosure described above above and/or illustrated in the figures.

In, e.g., figs. 13, 24, 34, the same member comprises both step support 15, extension 18 and cladding. In fig. 17, the same member comprises extension 18 and cladding 13, but not a step support 15.
If the extension 18 is not present, as illustrated in several of the figures described above (see, e.g., figs. 1-2B, 4-12, 20-23, 26-27, 29-30, 32, 36, 38, 39), the same member may or may not comprise both the/a cladding member 13 comprising the covering part 13b and one or more or more step support(s) 15, 15a, 15b. The cladding member 13 and the step support 15 may or may not be unitary parts of the same member. For example, the cladding 13 may be attached to the glass unit 3 at an exterior major surface 3su1 or an interior major surface of a glass sheet 3a, 3d, 3b, 3c, see, e.g., fig. 5 or 6 or 21-23a, whereas the support(s) 15, 15a, 15b may be attached to a profile 2a_bo of the movable frame, e.g., by means of an attachment part 35 and an adhesive and/or mechanical fastener(s) 34.
If the extension 18 is present, the same member (providing extension body support 19 or extension member 18b) may comprise none of, or one or both of, the cladding member 13, 13b and one or more or more step support(s) 15, 15a, 15b. If the same member comprises the extension 18 and one or both of the covering part 13b of the cladding and the step support(s), one or both of these 13, 15, 15a, 15b may or may not be unitary parts of the member.
It is however understood that in some embodiments, one or both of the cladding member 13 and/or step support 15 may be separate to the extension body support 19.
It is understood that in several of the figures above, the frame 2 may comprise a movable frame 2a and a fixation frame 2b. However, in further embodiments, the movable frame 2a may be omitted, and hence, the frame may alone comprise a fixation frame being attached to a building roof structure. In this/these embodiments, the glass unit 3 may be unmovable when installed in the building roof structure.
In some embodiments of the present disclosure, the total surface area of a major surface 3a1, 3a2, 3d1, 3d2 of the exterior glass sheet EGS, 3a, 3d may be larger than the total surface area 3b1, 3b2, 3a1, 3a2, 3d1, 3d2 of one or more other glass sheets 3a, 3b, 3d, such as the adjacent glass sheet 3a, 3b, 3d. This may, e.g., be provided due to one or more of the projecting glass sheet portions 3p1, 3p3, 3p5 of the exterior glass sheets as, e.g., described above.
The projection distances DIS1, DIS3, DIS4 and/or DIS6 described above according to various embodiments of the present disclosure may represent a projection length of the respective glass sheet relative to an edge of another glass sheet of the glass unit 3.,

DIS1 may represent a projection length with which an exterior glass sheet portion projects beyond a bottom edge of second glass sheet,
DIS3 may represent a projection length of exterior glass sheet portion 3p3 at a roof window side
DIS4 may represent a projection length of exterior glass sheet portion 3p5 at roof window top
DIS6 may represent a projection length of the projecting glass sheet portion 3p6, see fig. 41

figs. 1

13-18

25

The extension distance DIS2 may in a similar way represent an extension 18 length.
The projection distances DIS1, DIS3, DIS4 may extend to and terminate at the respective glass sheet edge of the projecting portion. For example, in fig. 1, the projection distance/length DIS1 terminates at the glass sheet bottom 3a edge 3a_be. In fig. 14, the extension distance/length terminates at the edge of the extension body that is distant to the bottom edge of the exterior glass sheet. In fig. 18, the projection distance/length DIS3 terminates at the side edge 3a_se of the exterior glass sheet. In fig. 25, the projection distance/length DIS4 terminates at the top edge 3a_te of the exterior glass sheet.

ITEMS

1. A roof window (1) for installation in a roof structure of a building, wherein the roof window (1) comprises
- a frame (2, 2a, 2b), and
- a vacuum insulated glass unit (3) supported by the frame (2), wherein the vacuum insulated glass unit (3) comprises a first glass sheet (3a) and a second glass sheet (3b), wherein an insulating, evacuated gap (4) is placed between the first glass sheet (3a) and the second glass sheet (3b), wherein a plurality of support structures (5) are distributed in the evacuated gap (4) so as to maintain a distance between a first major surface (3a1) of the first glass sheet (3a) facing towards the evacuated gap (4) and a first major surface (3b1) of the second glass sheet (3b) facing towards the evacuated gap (4), wherein an edge seal (9) encloses the evacuated gap (4),
- wherein the first glass sheet (3a) is configured to be placed closer to the exterior (EXT) of the building than the second glass sheet (3b) when the roof window (1) is installed in a building roof structure (50),
- wherein the vacuum insulated glass unit (3) comprises an exterior glass sheet (EGS, 3a, 3d) comprising an exterior major surface (3a2, 3d2) configured to face towards the exterior (EXT) of the building,
- wherein one or more glass sheets (EGS, 3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3) comprises a projecting glass sheet portion (3p1, 3p6) which projects beyond a bottom edge (3a_be, 3b_be, 3d_be, 3d_be) of one or more of other glass sheets (EGS, 3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3) with a projecting distance (DIS1, DIS6) at the bottom (BO) of the roof window (1).
2. A roof window (1) according to item 1, wherein an extension (18) is arranged in continuation of the bottom of the exterior glass sheet (3a, 3d, EGS) and extends with an extension distance (DIS2), wherein the extension (18) comprises an exterior surface (18a) which is configured to be visible from the exterior (EXT) of the building.
3. A roof window (1) according to item 2, wherein the frame (2) comprises a movable frame (2a) and a fixation frame (2b), wherein the movable frame (2a) is configured to move, such as pivot, relative to the fixation frame (2b) by means of one or more hinges (60), wherein the vacuum insulated glass unit (3) is attached to the movable frame (2a) and is configured to move together with the movable frame (2a),
wherein the extension (18) overlaps a bottom profile (2b_bo) of the fixation frame (2b) such as wherein the roof window (1) is a roof window (1) of the centre hung type.
4. A roof window (1) according to any of the preceding items wherein said projecting glass sheet portion is a projecting glass sheet portion (3p1) of the exterior glass sheet (EGS, 3a, 3d) which projects beyond a bottom edge (3b_be) of the second glass sheet (3b) with a first projecting distance (DIS1).
5. A roof window (1) according to any of items 1-3, wherein the glass sheet (3a, 3b) adjacent to the exterior glass sheet (EGS, 3a, 3d) projects beyond a bottom edge (3a_be, 3d_be) of the exterior glass sheet (EGS, 3a, 3d).
6. A roof window (1) according to any of items 2-5, wherein the extension distance (DIS2, DIS6) is at least 10 mm, such as at least 20 mm, such as at least 50 mm.
7. A roof window (1) according to any of the preceding items, wherein the vacuum insulated glass unit (3) comprises a lamination layer (6, 3c), such as a lamination layer comprising a lamination interlayer (6) and a lamination glass sheet (3c).
8. A roof window (1) according to item 7, wherein the lamination layer (6, 3c), such as a surface of a lamination glass sheet (3c), comprises a major surface (3su2) configured to face and abut the interior (INT) of the building after the roof window (1) has been installed in a roof structure (50) of a building.
9. A roof window (1) according to any of items 7-8, wherein the lamination layer (6, 3) comprises a lamination interlayer (6) and a lamination glass sheet (3c).
10. A roof window (1) according to item 9, wherein the lamination interlayer (6) comprises or consist of one or more of the following:
- ethylene vinyl acetate (EVA),
- polyisobutylene (PIB),
- polyacetals such as polyvinyl butyral (PVB),
- transparent polyurethane (PU),
- thermoplastic polyurethane (TPU),
- polyvinyl chloride (PVC),
- polyesters,
- cyclo olefin polymers (COP),
- ionomers and/or an ultraviolet activated adhesives.
11. A roof window (1) according to any of items 7-10, wherein the lamination layer (6, 3) comprises a lamination interlayer (6), wherein the lamination interlayer has a thickness above 0.5 mm, such as above 0.7 mm, such as above 1 mm or above 1.4 mm.
12. A roof window (1) according to any of items 2-11, wherein the extension (18) comprises an extension body (20) which is supported by, such as carried by, an extension body support (13, 15, 19), wherein the extension body (20) comprises said exterior, visible surface (18a) configured to face the exterior (EXT) of the building, such as wherein the extension body (20) is attached to the extension body support (15, 19).
13. A roof window (1) according to item 12, wherein the extension body (20) comprises one or more electric circuitries and/or electric components
and/or
wherein the extension body (20) comprises a photovoltaic module and/or a sensor, such as a rain sensor.
14. A roof window (1) according to any of items 12 or 13, wherein the extension body (20) is replaceably attached at the extension body support (19), such as wherein said replacement may be provided by manipulating one or more mechanical fasteners (25a, 25b).
15. A roof window (1) according to any of items 12-14, wherein the extension body support (19) comprises a cladding (13, 13a) of the roof window (1), such as wherein said cladding (13, 13b) is unitary with said extension body support (19).
16. A roof window (1) according to any of the preceding items, wherein the frame (2) comprises a movable frame (2a) and a fixation frame (2b), wherein the movable frame (2a) is configured to move, such as pivot, relative to the fixation frame (2b) by means of one or more hinges (60), wherein the vacuum insulated glass unit (3) is attached to the movable frame (2a) and is configured to move together with the movable frame (2a).
17. A roof window (1) according to item 16, wherein the extension (18) is supported (13, 15, 19, 35) by the movable frame (2a), such as carried by the movable frame (2a), such as mainly carried by the movable frame.
18. A roof window (1) according to item 17, wherein the extension (18b, 19, 20) is attached to a profile (2a_bo) of the movable frame (2a) by means of one or more mechanical fasteners (34), such as by means of attaching an attachment part (35), such as a bracket, of a member (18b, 19) of the extension to the profile (2a_bo).
19. A roof window (1) according to any of items 2-16, wherein the extension (18) is supported by, such as attached (80, 19, 18b) to, the vacuum insulated glass unit (3).
20. A roof window (1) according to any of items 2-19, wherein the extension (18) is supported by said projecting glass sheet portion (3p1, 3p6), such as a projecting glass sheet portion (3p1) of the exterior glass sheet (EGS), by means of an adhesive (80).
21. A roof window (1) according to any of items 2-16, wherein the extension (18) is supported by said projecting glass sheet portion (3p1, 3p6), such as by means of an adhesive (80), so that the extension (18) is carried by, such as mainly carried by, the projecting glass sheet portion (3p1, 3p6).
22. A roof window (1) according to any of items 2-21, wherein said exterior, visible surface (18a) of the extension (18) is arranged with a distance of less than 8 mm, such as less than 5 mm, such as less than 2 mm, from a plane (PL1) comprising the exterior major surface (3su1) of the exterior glass sheet (EGS) of the vacuum insulated glass unit (3).
23. A roof window (1) according to any of items 2-22, wherein said exterior, visible surface (18a) of the extension (18) is substantially flush with the exterior surface (3su1) of the exterior glass sheet (EGS, 3a, 3d), such as at least proximate a bottom edge (3a_be, 3d_be) of the exterior glass sheet (EGS).
24. A roof window (1) according to any of the preceding items, wherein said exterior, visible surface (18a) of the extension (18) is parallel with a plane (PL1) comprising the exterior surface (3su1) of the exterior glass sheet (EGS, 3a, 3d).
25. A roof window (1) according to any of items 2-24, wherein the exterior surface (18a) of the extension (18) is arranged below a plane (PL1) comprising the exterior major surface (3su1) of the exterior glass sheet (EGS) of the vacuum insulated glass unit (3), at least proximate a bottom edge (3a_be, 3d_be) of the exterior glass sheet (EGS, 3a, 3d).
26. A roof window (1) according to any of the preceding items, wherein the frame comprises a movable frame (2a) and a fixation frame (2b), wherein the movable frame (2a) is configured to move, such as pivot, relative to the fixation frame (2b) by means of one or more hinges (60), wherein the vacuum insulated glass unit (3) is attached to the movable frame (2a) and is configured to move together with the movable frame (2a), such as wherein the roof window (1) is a roof window (1) of the centre hung type.
27. A roof window (1) according to any of the preceding items, wherein the extension (18) is replaceably attached to the frame (2a_bo), such as wherein said replacement may be provided by manipulating one or more mechanical fasteners (34, 36).
28. A roof window (1) according to any of the preceding items, wherein said first glass sheet (3a) is the exterior glass sheet (EGS),
such as wherein said first major surface (3a1) of the first glass sheet (3a) is configured to face towards the interior (INT) of the building when the roof window is installed in a building roof structure (50).
29. A roof window (1) according to any of the preceding items, wherein the vacuum insulated glass unit (3) comprises an enamel layer (12), such as an enamel layer (12) which is substantially opaque to at least visible light,
wherein the enamel layer (12) covers, such as is applied to, a surface (3a1, 3p1s) of a projecting portion of the exterior glass sheet (3a) at the roof window bottom (BO), wherein said covered surface (3a1, 3p1s) is part of the major surface (3a1, 3d1) of the exterior glass sheet (3a, 3d, EGS) configured to face towards the interior (INT) of the building when the roof window is installed in a building roof structure (50).
30. A roof window (1) according to item 29, wherein the edge seal (9) is placed between the enamel layer (12) and the second glass sheet (3b),
such as wherein the edge seal (9) abuts the enamel layer (12) and/or preferably wherein the edge seal comprises a solder edge seal, such as a glass solder edge seal or a metal solder edge seal.
31. A roof window (1) according to item 29 or 30, wherein the enamel layer (12) covers a major surface (3p1s) of a projecting portion (3p1) and/or a further part of the exterior glass sheet (EGS) so as to hide one or more parts (13, 14, 15, 2a, 2b,) of the roof window.
32. A roof window (1) according to any of items 29-31, wherein the enamel layer (12) covers substantially an entire major surface (3p1s) of a projecting glass sheet portion (3p1) of the exterior glass sheet (EGS).
33. A roof window (1) according to any of the preceding items, wherein one or more low-e coatings (16a) is/are arranged at a major surface (3b1, 3a2) of an adjacent glass sheet (3b) facing towards the evacuated insulating gap (4), preferably at a surface configured to face towards the building exterior (EXT) when the roof window has been installed.
34. A roof window (1) according to any of the preceding items, wherein the exterior glass sheet (3a, 3d, EGS) comprises said projecting glass sheet portion (3p1), wherein the projecting glass sheet portion (3p1) projects beyond a bottom edge (3b_be) of the second glass sheet (3b) with a first projecting distance (DIS1).
35. A roof window (1) according to item 34, wherein the roof window comprises one or more step supports (15, 15a, 15b) configured to support the projecting glass sheet portion (3p1, 3p6).
36. A roof window (1) according to items 26 and 35, wherein one or more of the one or more step supports (15, 15a, 15b) is/are attached to a bottom profile (2a_bo) of the movable frame (2a).
37. A roof window (1) according to item 26 and any of items 35-36, wherein one or more of the one or more step supports (15, 15a, 15b) comprises a body part which extends to, and/or is placed opposite to, a position opposite a surface (2b_boa) of a bottom profile (2b_bo) of the fixation frame (2b) facing the first projecting glass sheet portion (3p1).
38. A roof window (1) according to any of items 35-37, wherein one or more of the one or more supports (15, 15a, 15b) is placed between the projecting glass sheet portion (3p1) and a surface (2b_boa, 2a_boa) of one or more bottom profiles (2a_bo, 2b_bo) facing the first projecting glass sheet portion (3p1).
39. A roof window (1) according to any of items 35-38, wherein the one or more step supports (15a, 15b, 15) support the first projecting glass sheet portion (3p1) at one or more locations arranged with a distance of at least 10%, such as at least 40%, such as at least 60% of the first projecting distance (DIS1) from the bottom edge (3b_be) of the second glass sheet (3b).
40. A roof window (1) according to any of items 35-39, wherein one or more of the one or more step supports (15, 15a, 15b) is attached to the first projecting glass sheet portion (3p1), such as by means of one or more an adhesives (33a, 33b).
41. A roof window (1) according to any of items 35-40, wherein one or more of the one or more step supports (15, 15a, 15b) comprises resilient support elevations (17, 33a, 33b), such as comprising discretely arranged support elevations and/or one or more adhesives.
42. A roof window (1) according to any of the preceding items, wherein the projecting distance (DIS1, DIS6) is at least 6 mm, such as at least 25 mm, such as at least 45 mm.
43. A roof window (1) according to any of the preceding items, wherein the projecting distance (DIS1, DIS6) is no more than 60 mm, such as no more than 30 mm, such as no more than 25 mm.
44. A roof window (1) according to any of the preceding items, wherein the movable frame (2a) comprises a first structural bottom profile (2a_bo) and wherein the fixation frame (2b) comprises a further structural bottom profile (2b_bo),
- wherein the exterior glass sheet (EGS, 3a, 3d) partly or fully overlaps the full width (W1) of the first structural bottom profile (2a_bo),
- such as wherein the projecting glass sheet portion (3p1, 3p6) partly or fully overlaps the width (W2) of the further structural bottom profile (2b_bo).
45. A roof window (1) according to any of items 1-34, wherein the second glass sheet (3b) comprises said projecting glass sheet portion (3p6).
46. A roof window (1) according to any of items 2-11 and/or 16-44, wherein the extension (18) comprises an extension member (18b) provided by a plate/sheet, such as a polymer sheet/plate and/or a metal sheet/plate,
wherein the extension member (18b) comprises the visible extension surface (18a) facing away from the building interior (INT) and which is subjected to weather such as rain and sunlight when the roof window is installed in the building roof structure (50).
47. A roof window (1) according to item 46, wherein the extension member (18b) is structural so as to provide or support the structural integrity of the extension (18).
48. A roof window (1) according to item 46 or 47, wherein the extension member (18b) comprises a coating, such as a paint or enamel, wherein said coating comprises the visible extension surface.
49. A roof window (1) according to any of items 2-48, wherein the extension (18) comprises an elongated, structural profile (13, 15, 19, 18b), such as a metal profile, providing the structural integrity of the extension (18).
50. A roof window (1) according to item 49, wherein the elongated, structural profile (13, 15, 19, 18b) comprises a metal sheet having a thickness between 0.5 mm and 2 mm, such as between 0.5 mm and 1.3 mm, such as between 0.7 mm and 1.0 mm.
51. A roof window (1) according to any of the preceding items, wherein the extension (18), such as the extension body (20) or the extension member (18b), comprises an enamel layer (12), such as an enamel layer (12), which is substantially opaque to at least visible light.
52. A roof window (1) according to item 51, wherein the enamel layer (12) is placed between the extension body (20) and an extension body support (19).
53. A roof window (1) according to any of items 12-52, wherein the thickness of the extension body (20) is lower/smaller than the thickness of the exterior glass sheet (EGS, 3a, 3d), such as wherein the extension body (20) has a thickness that is at least 10% lower, such as at least 25% lower or at least 40% lower than the thickness of the exterior glass sheet (3a, 3d, EGS).
54. A roof window (1) according to any of items 2-53, wherein the extension (18), such as a profile (13, 15, 19, 18b), comprises a mechanical holding member (19a, 19b), such as comprising a holding wall (19a, 19b), which is configured to secure the exterior glass sheet (3a, 3d, EGS) at the bottom thereof.
55. A roof window (1) according to item 54, wherein the mechanical holding member (19a, 19b) comprises a wall (19a) placed opposite to, such as next to, the bottom edge (3a_be, 3d_be) of the exterior glass sheet (3a, 3d, EGS).
56. A roof window (1) according to item 54 or 55, wherein the mechanical holding member (19a, 19b) comprises a hook part (19b) extending to a position opposite to the exterior major surface (3a2, 3d2) of the exterior glass sheet (EGS, 3a, 3d), wherein the hook part is configured to secure the exterior glass sheet (3a, 3d, EGS) at the frame (2).
57. A roof window (1) according to any of items 54-56 and according to item 12,
wherein the bottom edge (3a_be, 3d_be) of the exterior glass sheet (3a, 3d, EGS) is placed at a first side of a holding wall (19a) of the mechanical holding member, and wherein the extension body (20) is placed at the opposite side of the holding wall (19b).
58. A roof window (1) according to any of the preceding items, wherein the vacuum insulated glass unit (3) comprises a third glass sheet (3d),
wherein a further insulating gap (7) is placed between a first major surface (3d1) of the third glass sheet (3d) facing the further insulating gap (7) and a major surface (3b2, 3a2) of a glass sheet (3b, 3a) of the vacuum insulated glass unit (3) which faces the further insulating gap (7).
59. A roof window (1) according to item 58, wherein said major surface (3b2, 3a2) of the glass sheet (3b, 3a) of the vacuum insulated glass unit (3) which faces the further insulating gap (7) is a second major surface (3b2) of the second glass sheet (3b) which faces away from the evacuated gap (4).
60. A roof window (1) according to item 58 or 59, wherein said further insulating gap (7) is placed between the lamination layer (6a, 3c) and the evacuated gap (4).
61. A roof window (1) according to item 60, wherein the further insulating gap (7) is the insulating gap of the insulating gaps (4, 7) of the vacuum insulated (3), which is configured to be placed proximate the exterior (EXT) of the building,
and/or
wherein said evacuated gap (4) is placed between the further insulating gap (7) and the lamination layer (6a, 3c).
62. A roof window (1) according to any of items 58-61, wherein the further insulating gap (7) is a gas filled gap (7), such as a gap (7) comprising argon gas.
63. A roof window (1) according to item 15 and 16, wherein the cladding comprises a covering part (13b) which covers a bottom part of the roof window (1) wherein the covering part (13b) extends to a position opposite a bottom part of the fixation frame (2b), such as wherein the covering part (13b) extends in a direction away from a plane (PL1) comprising a major surface of a glass sheet (3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3), to a position opposite the exterior of the frame (2), such as the exterior of a fixation frame (2b).
64. A roof window (1) according to any of the preceding items, wherein the first and second glass sheets (3a, 3b) are tempered glass sheets such as thermally tempered glass sheets.
65. A building comprising a roof window (1) according to any of the preceding items installed in a roof structure (50) of the building.

List (non-exhaustive)

1: : Roof window
2: : frame
2a: : movable frame
2a_bo: : bottom profile of movable frame
2a_to: : top profile of movable frame
2a_si: : side profile of movable frame
2b: : fixation frame
2b_bo: : bottom profile of fixation frame
2b_to: : top profile of fixation frame
2b_si: : side profile of fixation frame
3: : vacuum insulated glass unit
3a: : First glass sheet (may or may not be exterior glass sheet EGS)
3a_te: : top edge of first glass sheet
3a_be: : bottom edge of first glass sheet
3a_se: : side edge of first glass sheet
3b: : second glass sheet
3b_te: : top edge of second glass sheet
3b_be: : bottom edge of second glass sheet
3bp: : portion of second glass sheet which projects beyond edge seal 9
3c: : lamination glass sheet
3c_be: : bottom edge of lamination glass sheet.
3d: : third glass sheet
3p1: : projecting glass sheet portion at roof window bottom
3p2: : projecting glass sheet portion which projects beyond lamination layer
3p3: : projecting glass sheet portion which projects beyond a side edge of adjacent glass sheet
3p4: : projecting glass sheet portion which projects beyond edge of exterior glass sheet at roof window top
3p5: : projecting glass sheet portion which projects beyond top edge of the adjacent glass sheet
3p6 :: : projecting glass sheet portion of glass sheet adjacent to exterior glass sheet
3su1: : exterior major surface of glass unit facing towards exterior of building
3su2: : exterior major surface of glass unit facing towards interior of building
4: : evacuated gap
5: : support structure
6: : lamination interlayer
6e: : edge of lamination interlayer
7: : further insulating gap
7a: : edge seal enclosing further insulating gap
8: : mechanical fastening part 8 comprising gripping member
8a: : gripping member of mechanical fastening part
9: : edge seal enclosing evacuated gap
11: : protection sealing
12: : enamel providing masking
13: : cladding member
13a: : connection part of cladding
13b: : covering part of cladding
14: : gasket member
15: : step support providing support of first projecting glass sheet portion
16a, 16b: : Low-e coating(s)
17: : support elevations such as resilient support elevations
18: : extension
18a: : exterior extension surface
18b: : extension member
19: : extension body support
19a: : holding wall is configured to secure the exterior glass sheet at bottom
19b: : hook part configured to secure the exterior glass sheet at bottom
20: : extension body
21a, 21b: : side water cover
22: : flashing
23, 23a, 23b: : top gasket
24: : top cover
24a: : covering surface of top cover
25a, 25b: : fastener for fastening extension body at extension body support
26: : gasket between glass unit and profile of movable frame
27: : handle
27a: : handle base part
28: : gasket engaging with and/or comprised in cladding bottom part
31: : tightening gasket configured to provide tightening between movable frame and fixation frame.
33, 33a, 33b: : adhesive such as adhesive tape or glue
34: : mechanical fastener
35: : attachment part, such as a plate and/or a bracket/mounting, for attaching member to profile of movable frame
36: : installation guide
37: : sealing
38: : side water channel
39a, 39b: : side edge surface of water cover
40: : resilient protection
50: : building roof structure
51: : roofing
52: : roof batten
60: : hinge
DIS1: : distance with which exterior glass sheet portion projects beyond a bottom edge of second glass sheet 3b
DIS2: : extension distance
DIS3: : Projection distance of exterior glass sheet portion 3p3 at roof window side
DIS4: : Projection distance of exterior glass sheet portion 3p5 at roof window top
DIS6: : Projection distance of projecting glass sheet portion 3p6
EGS: : Exterior glass sheet
EXT: : Exterior of building
INT: : Interior of building
FO1: : Frame opening provided between profiles of movable frame
FO2: : Frame opening provided between profiles of fixation frame
SI1, SI2: : Sides of roof window
TO: : Roof window top
BO: : Roof window bottom
EGS: : Exterior glass sheet
HD: : Height direction of roof window
WD: : Width direction of roof window
CEGU: : Centre of evacuated glass unit gap
RAX: : Rotation axis
PL1: : Plane comprising exterior glass sheet surface 3su1
PL2: : Plane comprising exterior of roofing or exterior of flashing.
an1: : Angle between plane PL1 and extension surface 18a

Claims

A roof window (1) for installation in a roof structure (50) of a building, wherein the roof window (1) comprises
- a frame (2, 2a, 2b), and

- a vacuum insulated glass unit (3) supported by the frame (2), wherein the vacuum insulated glass unit (3) comprises a first glass sheet (3a) and a second glass sheet (3b), wherein an insulating, evacuated gap (4) is placed between the first glass sheet (3a) and the second glass sheet (3b), wherein a plurality of support structures (5) are distributed in the evacuated gap (4) so as to maintain a distance between a first major surface (3a1) of the first glass sheet (3a) facing towards the evacuated gap (4) and a first major surface (3b1) of the second glass sheet (3b) facing towards the evacuated gap (4), wherein an edge seal (9) encloses the evacuated gap (4),

wherein the first glass sheet (3a) is configured to be placed closer to the exterior (EXT) of the building than the second glass sheet (3b) when the roof window (1) is installed in a building roof structure (50),

wherein the vacuum insulated glass unit (3) comprises an exterior glass sheet (EGS, 3a, 3d) comprising an exterior major surface (3a2, 3d2) configured to face towards the exterior (EXT) of the building,

wherein one or more glass sheets (EGS, 3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3) comprises a projecting glass sheet portion (3p1, 3p6) which projects beyond a bottom edge (3a_be, 3b_be, 3d_be, 3d_be) of one or more of other glass sheets (EGS, 3a, 3b, 3c, 3d) of the vacuum insulated glass unit (3) with a projecting distance (DIS1, DIS6) at the bottom (BO) of the roof window (1),

wherein an extension (18) is arranged in continuation of the bottom of the exterior glass sheet (3a, 3d, EGS) and extends with an extension distance (DIS2), wherein the extension (18) comprises an exterior surface (18a) which is configured to be visible from the exterior (EXT) of the building.
A roof window (1) according to claim 1, wherein the frame (2) comprises a movable frame (2a) and a fixation frame (2b), wherein the movable frame (2a) is configured to move, such as pivot, relative to the fixation frame (2b) by means of one or more hinges (60), wherein the vacuum insulated glass unit (3) is attached to the movable frame (2a) and is configured to move together with the movable frame (2a),
wherein the extension (18) overlaps a bottom profile (2b_bo) of the fixation frame (2b) such as wherein the roof window (1) is a roof window (1) of the centre hung type.
A roof window (1) according to claim 1 or 2, wherein said projecting glass sheet portion is a projecting glass sheet portion (3p1) of the exterior glass sheet (EGS, 3a, 3d) which projects beyond a bottom edge (3b_be) of the second glass sheet (3b) with a first projecting distance (DIS1).
A roof window (1) according to claim 1 or 2, wherein the glass sheet (3a, 3b) adjacent to the exterior glass sheet (EGS, 3a, 3d) comprises said projecting glass sheet portion (3p6),
wherein said projecting portion (3p6) projects beyond a bottom edge (3a_be, 3d_be) of the exterior glass sheet (EGS, 3a, 3d),

such as wherein said extension (18) is attached (80) to said projecting glass sheet portion (3p6).
A roof window (1) according to any of the preceding claims, wherein said first glass sheet (3a) is the exterior glass sheet (EGS).
A roof window (1) according to claim any of the preceding claims, wherein the extension distance (DIS2, DIS6) is at least 10 mm, such as at least 20 mm, such as at least 50 mm.
A roof window (1) according to any of the preceding claims, wherein the vacuum insulated glass unit (3) comprises a lamination layer (6, 3c), such as a lamination layer comprising a lamination interlayer (6) and a lamination glass sheet (3c),
wherein the lamination layer (6, 3c) comprises a major surface (3su2) configured to face the interior (INT) of the building after the roof window (1) has been installed in a roof structure (50) of a building.
A roof window (1) according to any of the preceding claims, wherein the extension (18) comprises an extension body (20) which is supported by, such as carried by, an extension body support (13, 15, 19),
wherein the extension body (20) comprises said exterior, visible surface (18a) configured to face the exterior (EXT) of the building,

such as wherein the extension body (20) is attached to the extension body support (15, 19).
A roof window (1) according to claim 8, wherein the extension body (20) comprises one or more electric circuitries and/or electric components
and/or
wherein the extension body (20) comprises a photovoltaic module and/or a sensor, such as a rain sensor.
A roof window (1) according to any of claims 8 or 9, wherein the extension body (20) is replaceably attached at the extension body support (19), such as wherein said replacement may be provided by manipulating one or more mechanical fasteners (25a, 25b).
A roof window (1) according to any of claims 8-10, wherein the extension body support (19) comprises a cladding (13, 13a) of the roof window (1), such as wherein said cladding (13, 13b) is unitary with said extension body support (19).
A roof window (1) according to any of the preceding claims, wherein the frame (2) comprises a movable frame (2a) and a fixation frame (2b), wherein the movable frame (2a) is configured to move, such as pivot, relative to the fixation frame (2b) by means of one or more hinges (60), wherein the vacuum insulated glass unit (3) is attached to the movable frame (2a) and is configured to move together with the movable frame (2a), wherein the extension (18) is supported (13, 15, 19, 35) by the movable frame (2a), such as carried by the movable frame (2a),
such as wherein the extension (18b, 19, 20), such as a profile (18b, 19) of the extension, is attached (35, 34) to a profile (2a_bo) of the movable frame by means of one or more mechanical fasteners (34).
A roof window (1) according to any of the preceding claims, wherein the extension (18), such as a profile (18b, 19) of the extension, is supported by, such as attached (80) to, the vacuum insulated glass unit (3),
A roof window (1) according to any of claims 1-11, wherein the extension (18), such as a profile (18b, 19) of the extension, is supported by said projecting glass sheet portion (3p1, 3p6), such as by means of an adhesive (80), so that the extension (18) is carried by the projecting glass sheet portion (3p1, 3p6).
A roof window (1) according to any of the preceding claims, wherein said exterior, visible surface (18a) of the extension (18) is substantially flush with the exterior surface (3su1) of the exterior glass sheet (EGS, 3a, 3d), such as at least proximate a bottom edge (3a_be, 3d_be) of the exterior glass sheet (EGS), or
wherein the exterior surface (18a) of the extension (18) is arranged below a plane (PL1) comprising the exterior major surface (3su1) of the exterior glass sheet (EGS) of the vacuum insulated glass unit (3), such as at least proximate a bottom edge (3a_be, 3d_be) of the exterior glass sheet (EGS, 3a, 3d).
A roof window (1) according to any of the preceding claims, wherein a profile (19, 18b) of the extension, comprises a mechanical holding member (19a, 19b) which is configured to secure the exterior glass sheet (3a, 3d, EGS) at the bottom thereof, such as wherein the mechanical holding member (19a, 19b) comprises a wall (19a) placed opposite to, such as next to, the bottom edge (3a_be, 3d_be) of the exterior glass sheet (3a, 3d, EGS).