DK181067B1

DK181067B1 - Flashing assembly and associated method

Info

Publication number: DK181067B1
Application number: DKPA202070569A
Authority: DK
Inventors: Melsen Michael
Original assignee: Vkr Holding As
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2022-11-07
Also published as: EP3964665A1; DK202070569A1

Abstract

The invention relates to a flashing assembly (60) for a roof penetrating structure, a method of mounting a flashing assembly and a roof structure (19), The flashing assembly (60) comprises a skirt member (20) configured for at least partly covering roof covering elements (51) facing the bottom of the roof penetrating structure (19), a flange member (40) positioned in extension of the skirt member (20) where the flange member (40) has an inner surface, adapted to face in an interior direction towards an interior of the building and is adapted to lay flat and follow the surface of the roof covering elements (51), the flange member (40) being formable for substantially permanent deformation and comprising an elastomer being plastic and/or a textile.

Description

DK 181067 B1 1 The present invention relates to a flashing assembly according to claim

1. It further relates to a method of mounting such a flashing assembly and a roof structure comprising such a flashing assembly. Skirt flashing elements, which typically comprise a skirt member adapted for resting on the outer surface of the roofing material and a plate or rail member to be attached to the roof penetrating structure, are used for sealing joints between building structures penetrating a roof surface, for example a joint between the frame of a roof window and the surrounding roofing material, particular at the lower horizontal member of the main frame of the roof window. The skirt member is important with regards to securing a well-fitting, stable and secure sealing of the joint between a roof penetrating structure and a roof surface, particularly when using an undulated roofing material such as tiles. The skirt member shall ideally provide for an easy mounting procedure, which ensures that the skirt member is firmly and closely mounted onto the roof surface and stays in this position for the entire lifetime of the flashing. In order to achieve this, the skirt member is made of a material, which is easy to bend, preferably by hand, and which has a relatively high weight and a low elasticity. Skirt flashing elements have traditionally been made from lead plates with a thickness of approximately 1 mm. Lead as a flashing material has a number of advantages as it is very easy to deform with only a very limited elasticity, i.e. the lead plate substantially stays in the form into which it is initially bend without any elastic bouncing back. This inherent feature of lead is of great advantage when a lead-skirt is shaped directly onto for example an undulated roof surface, since such skirts cannot be bent in excess in order to compensate for possible elastic re-bouncing. Although lead is virtually non-elastic, there may be a minimal re-bouncing, but as lead is a very heavy material, gravity will keep the lead-skirt in close contact with the roof surface. The high weight also prevents the skirt from being lifted and bent backwards by heavy winds. Lead, however, is environmentally harmful and has therefore been forbidden for use in construction work in many countries.

Different kinds of skirt flashing elements having a sandwich structure with a stress damping and stabilizing layer of ductile material covered by a foil

DK 181067 B1 2 sheeting has been suggested as alternatives to lead. The core layer has typically been made out of a polymeric material or bitumen product, and the foil has typically been a thin metal foil, preferably aluminium foil.

For use on roof surfaces in the form of undulated tiles with very deep troughs these sandwich structures are typically wave-corrugated or pleated giving them a surplus of material, which allows them to stretch so that a good fit between the flashing and roofing may be obtained.

An example of a prior art document showing a wave corrugated flashing is EP2749707.

DE3904174 discloses a flashing for use with a roof penetrating structure.

Practice, however, has shown that wave-corrugated or pleated skirt flashing elements can result in the undulated roof covering resting on the flanges of wave-corrugated skirt member, being lifted, because the corrugated surface makes it impossible for the undulated roofing elements to rest flat on the undulated roofing elements, which it overlaps. It is considered a problem with roof windows having a small width, where the width of the two flanges together is of the same or almost of the same width as the skirt member. Not only does the overall appearance of the flashing assembly suffer with such a dominant configuration of the flanges but it also becomes hard to fit the skirt and flanges to highly undulated roof coverings. The object of the invention is therefore to make an improved flashing without the above-mentioned drawbacks.

This is achieved by a flange member that is adapted to lay flat and follow the surface of the roof covering element, the flange member being formable for substantially permanent deformation, and comprising an elastomer being plastic and/or a textile, and wherein the flange member is not corrugated but is a flat piece of material.

The deformed flange member may be kept in place by the roof covering elements resting on top of it. For example, if the flange member is lightweight, such as a textile or does not comprise metal or a minimal amount of metal.

DK 181067 B1 3 What is meant by plastic is that the material is able to be deformed without rupture by the action of a force and remain deformed after the force is removed. It may have plastic properties similar to modelling clay or similar materials with ductile or like properties. The flange member may be plastic.

It may alternatively or additionally be viscoelastic such that a faster deformation results in a higher degree of elasticity.

The flange member may be adapted to lay flat and follow the surface of the roof covering element(s) by being elastic, but still maintain its shape after being modelled or by having surplus material. For example, the flange member may be flared such the flange member is progressively wider towards the bottom and/or stretchable.

The flashing assembly is particularly suitable for undulated roof covering elements, such as tiles, but may also be used for flat roof covering elements.

Textile may include anything made from fibrous materials. The term includes fabrics made of adhered fibers like felt, items made of relatively unmodified plant materials like materials used for baskets and mats, fabrics made of spun yarns such as knitted and woven cloth, and items made of synthetic linear elements such as for nylon window screens. The textile may be woven, non-woven, spun or molded.

The flange member has an inner surface, adapted to face in an interior direction towards an interior of the building.

The inner surface of the flange member may have adhesive properties to provide at least a temporary attachment to the roof covering elements until roof covering elements have been positioned on top of the flange member, to provide an easier installation. The flange member may be repositionable even with adhesive properties. The inner surface may be provided with a release liner to protect an adhesive inner surface.

According to an embodiment, the textile is impregnated and/or laminated and/or vulcanized. The purpose of this is to repel water.

The flange member and/or the skirt member may be made without any metal or a minimum amount of metal. For example, the flange member and/or

DK 181067 B1 4 the skirt member may comprise less than 15% metal by volume, less than 10% metal by volume, less than 8% metal by volume or less than 5 % metal by volume. The minimum amount of metal could be a thin metal foil or metal particles in the flange and/or skirt member.

By using a flange member that has both plastic and elastic properties, it is possible to stretch the flange member, so it adapts to the shape of the roof covering elements, e.g. such that conforms to the shape of the roof covering elements and stays in place after being mounted. It is thus possible to position the tiles or roofing material closely to the flashing and a closer fit is provided, in particular in low roof inclinations. When the tile or roofing material is brought closer together a possible corrugated part of the skirt member will also be pushed further down towards the roof. What is meant by corrugated, is that surplus material is available in the form of corrugations or pleats, so the material can reach down into the troughs of the roof covering elements. The skirt member may be plane as well, without corrugations. It may also be plastic and/or elastic.

The flange member may comprise a main layer comprising an elastomer being plastic.

The flange member may comprise a second layer comprising an elastomer being elastic and preferably adhesive.

The flange member may comprise sailcloth, where the material(s) for the sailcloth is preferably selected from a group consisting of flax, hemp, cotton, nylon, polyester, aramids, and carbon fibers The flashing assembly may comprise a sealing member attachable to the bottom of the roof penetrating structure and the skirt member.

The sealing member may be in the form of a rail or a plate material, usually metal, such as aluminum, adapted to cover a part of the space between the roof penetrating structure and the roof covering elements.

The flashing assembly may comprise a skirt member of a corrugated sheet material having a first edge attached to the sealing member in the mounted condition, and a fourth edge, opposite the first edge, and a second and a third edge connecting the first edge with the fourth edge, preferably the

DK 181067 B1 second and the third edges are substantially perpendicularly to the first edge. The skirt member may comprise metal, preferably aluminium. The flange member may comprise metal particles, such as iron oxide. The main layer may comprise mainly short chained elastomer. The 5 second layer may comprise mainly long chained elastomer.

In an embodiment at least 90%, more preferably at least 95% of the volume of the flange member may consist of an elastomer. The elastomer may also be synthetic. The surface of the main layer facing the exterior may be covered by a thin foil, e.g. less than 0.5 mm thick, or provided with UV protection, e.g. a form of paint, or another exposure protection.

The elasticity of the second layer contributes to distributing the forces in the main layer when the flange member is being molded into place clinging to the roof covering elements.

The elasticity also depends on the speed with which you pull the flange member. The faster you pull and/or provide an impulse to the material, the more elastic it will feel. If you slowly press on the material it will leave a mark and be permanently deformed.

The second layer or bottom layer may be adhesive.

The adhesiveness of the second layer contributes to holding the flange member in place during mounting, before a roof covering element may be placed on top of it, and subsequently holds it in place.

The flange member is preferably flexible or pliable or formable.

What is meant by being flexible is that the flange member is able to bend, preferably up to 150 degrees, more preferably up to 180 degrees, without breaking.

The flashing assembly is either delivered on site in one piece or is assembled on site. For example, the skirt member may be attached to the flange member or they may be attached to each other on site.

The inclination of the roof is preferably between 15 degrees and 70 degrees.

The roof covering elements may be tiles or other undulated roof covering elements.

DK 181067 B1 6 The top, bottom and side members may have an interior side for facing in an interior direction towards an interior of the building in a mounted condition and an exterior side for facing in an exterior direction opposite the interior direction in the mounted condition.

The skirt member may be used for covering the remaining space between the roof penetrating structure and the roof covering elements and part of the roof covering elements facing the roof penetrating structure, at the bottom of the roof penetrating structure.

The skirt member may be a laminated sheet material comprising a layer of aluminum, cobber or zinc or alloys thereof, and a polymer layer or bitumen layer. It may be coated or include fillers and/or adhesives. It may also be made of the same materials as the flange member.

A second and/or third edge of the skirt member may be positioned in continuation of a length of the first and/or second side member of the roof penetrating structure, when mounted. The second and/or third edge of the skirt member may be positioned in continuation of the edge of the roof covering elements facing the first or the second side of the roof penetrating structure.

The flange member is preferably free from metal. It may include fillers such as chalk.

The flange member may have a break elongation of more than 250%, preferably more than 300%. When pulling the flange member over the roof covering elements, some areas of the flange member will be more exposed to being pulled than others. The break elongation makes it possible to stretch the material were needed, so the flange member can be moulded according to the roof covering elements.

The flange member may be around 20-30 cm wide and 20 — 30 cm long. It is preferably rectangular but may be semi-circular.

The main layer or flange member may comprise material selected from a group consisting of Ethylene Propylene Diene Monomer (EPDM) and butyl and a second layer preferably comprising butyl and/or resin. The flange member may comprise a rubber suitable for the purpose when it comes to its plastic and elastic properties. The butyl in the main layer is preferably

DK 181067 B1 7 substantially made from short chained butyl. The butyl of the second layer is preferably substantially made from long changed butyl or another long-chained rubber material, which contributes to the elasticity. The resin, or other tacky material, contributes to adhering the flange member to the roof covering elements. The second layer or bottom layer facing towards the interior of the building is preferably covered by a release liner, such that it is easier to handle the flange member during mounting. The flange member may be configured to be positioned at least partly between the roof covering elements. A part of it may extend from between the roof covering elements on the outside of the roof.

The flange member may have a thickness between 1.5-4 mm, preferably between 1.5-3 mm in a pre-mounted, non-stretched, condition. When the flange member is mounted it may be formed or stretched such that is conforms to the shape of the roof covering elements. When it is mounted, the thickness may be reduced to between 0.7 and 1 mm as the material is stretched. Because the flange member has a limited thickness, the roof covering elements is able to be positioned close to each other, as opposed to a corrugated or thicker material. The flange member may also be 1-2 mm thick in the pre-mounted, non-stretched, condition.

In an embodiment the main layer has preferably a thickness between

1.2 — 1.7 mm, more preferably around 1.5 mm in the pre-mounted, non- stretched, condition. The second layer has preferably a thickness between 0.3 — 0.7 mm, preferably around 0.5 mm in the pre-mounted, non-stretched, condition.

In an embodiment the flange member and the skirt member constitutes one piece or at least share a layer of material. They may be made from the same material as described for either the flange member or the skirt member in this application.

The flange member and the skirt member may be attached to each other in the mounted condition. They may be disconnected from each other before being mounted.

The flange member and the skirt member may be attached to each

DK 181067 B1 8 other by means of a connection means such as a snap fitting and/or an adhesive or welded together.

It may also be laminated together.

The flange member may be provided with an attachment flange adapted to engage with gripping means, for example formed like an omega shape, on the skirt member.

The flange member or main layer may comprise a filler, preferably chalk, which contributes to the materials plasticity.

The flange member may have a bottom edge extending across the inclination direction, wherein the bottom edge may be substantially in line with the roof covering element resting upon the flange member in the mounted position.

Thereby the flange member becomes almost invisible in the mounted position, such that visually the width of the skirt member and flange member corresponds to the width of the window.

In order to have a bottom edge of the flange member being in line with the overlaying roof covering element, the flange member is preferably adapted such that the piece of flange member that extends out between the roof covering elements is cut off after the roof covering elements has been mounted.

Using a flashing assembly with a skirt and flange member of the above-mentioned configuration, may also allow the installer to make a trimming of the flange member.

For instance, if a very overall slim design look of the roof window and the flashing assembly all together is wanted, it can be done by trimming of the flange member by for instance cutting away any excess material coming out under the overlaying roof covering elements.

In this way, looking at the roof window, the flashing assembly and the roof covering all in their mounted positions, you would get the impression that the skirt so to speak just makes a continuation of the roof penetrating structure, e.g. the roof window and leaving the two flange members invisible underneath the roof covering elements.

The flange member may be adapted to be cut across the inclination direction when in the mounted position, with pocket knife or similar tool.

For example, when there is little or no metal present and the flange member is formable, such as pliable, and relatively thin, for example less than 3 mm thick, the material is easy to cut with a handtool.

DK 181067 B1 9 According to a second aspect a method of mounting a flashing assembly is disclosed. The method comprises the steps of mounting the flashing assembly in the roof, mounting the roof covering elements, such that the at least one flange member is at least partly covered by the roof covering elements and removing a part of the flange member that extends out from between the roof covering elements, thereby aligning a bottom edge of the flange member with a bottom edge of the roof covering element positioned on top of the flange member. The removal of the part of the flange member that extends out from between the roof covering elements is a lot easier, when metal is not forming part of the flange member but instead is being main made from an elastomer or textile. The person mounting the flashing assembly can easily cut of surplus material, that does not contribute to sealing the roof. Furthermore, a more harmonious look of the roof is obtained.

The method may further comprise the step of attaching a sealing member to the bottom of the roof penetrating structure.

According to a third aspect a roof structure is disclosed, the roof structure comprising roof covering elements and a flashing assembly according to the first aspect.

In the roof structure the flange member of the flashing assembly may be positioned between the roof covering elements and a bottom edge of the flange member may be substantially aligned with a bottom edge of the roof covering elements covering the flange member. Any element mentioned above in relation to the flashing assembly and/or method may be included in the roof structure.

According to an embodiment a flashing assembly is disclosed for use for a roof penetrating structure, preferably a window, in an inclined roof of a building, the inclined roof having an inclination direction and having roof covering elements, the roof penetrating structure comprising a top member and a bottom member extending across the inclination direction, and a first side member and a second side member connecting the top member with the bottom member extending in the inclination direction, the flashing assembly comprising:

DK 181067 B1 10

- a sealing member attachable to the bottom of the roof penetrating structure,

- a skirt member of a corrugated sheet material having a first edge attached to the sealing member in the mounted condition, and a fourth edge,

opposite the first edge, and a second and a third edge connecting the first edge with the fourth edge, preferably the second and the third edges are substantially perpendicularly to the first edge, the skirt member is configured for at least partly covering the roof covering elements facing the bottom of the roof penetrating structure, the skirt member comprising metal, preferably aluminium,

- a flange member attached or configured to be attached to the skirt member at the second and/or third edge, the second and/or third edge being configured to be positioned at the first and the second side of the roof penetrating structure respectively, characterized in that the flange member is flexible and comprises a main layer comprising an elastomer being plastic and a second layer comprising an elastomer being adhesive and elastic.

The invention will now be explained in closer detail with reference to embodiments shown in the drawings, in which Fig. 1 shows an embodiment of a flashing assembly in a perspective view, Fig. 2 shows an embodiment of a flashing assembly in a perspective view in a mounted condition, Fig. 3 shows another embodiment of a flashing assembly in a perspective view in a mounted condition, Fig. 4 shows a cross section of an embodiment of the flange member, Fig 5 shows an embodiment of a snap fitting between the flange member and the skirt member,

DK 181067 B1 11 Fig. 6 shows another embodiment of a flashing assembly in a perspective view, Fig. 7 shows an embodiment of the flashing assembly in a perspective view, corresponding to the embodiment in fig. 3, however with more details and Fig. 8 shows another embodiment of a flashing assembly in a perspective view in a mounted condition.

In the embodiment shown in Fig. 1, only a half section of the flashing assembly 60 is shown, and a corresponding mirror inverted image may be positioned in extension of the skirt member and the rail member. The flashing assembly 60 comprises a sealing member in the form of a rail element 10 and a skirt member 20. The rail element 10 is attached to the skirt member 20 along a first edge 31 thereof and serves as a connecting element between the skirt member 20 and, for example, the frame of a roof window (not shown) installed in an inclined roof. A flashing member 15 is attached to a flange member 40 and a number of sub-elements 12, 13, 14 intended for being connected to the window and/or roof in a manner known per se.

The skirt member 20 is corrugated to provide a surplus of material in a direction along the skirts first edge 31 and fourth edge 34. In this embodiment the skirt member 20 is laminated. The skirt member 20 comprises first layer made from sheet aluminium with a thickness of 0,15 mm, which has been lacquered, which layer faces the exterior. The second cover layer is a cross- laminated foil of a polyolefin, preferable polyethylene, such as the one sold under the trademark Valeron& and with a thickness of 0,075 mm. The third cover layer is made from as polymer, such as polypropylene or polyethylene, or silicone coated paper. Other thicknesses may be used as well.

The skirt member 20 comprises a second edge 32 and a third edge (not shown) connecting the first edge 31 and fourth edge 34. A flange member 40 is attached both at the second edge 32 and the third edge (not shown) by a snap fitting. The skirt member 20 and the flange member 40 may be integrally

DK 181067 B1 12 formed. The flange member 40 is flexible and comprises mainly an elastomer. The flange member is abutting both the skirt member 20 and flashing member

15. The flange member 40 comprises a main layer 41 comprising butyl being plastic in its ability to be modelled according to the shape of the roof, and a second layer 42 comprising a butyl and resin, however with the abilities of being adhesive and elastic.

Fig. 2 shows the flashing assembly in the mounted condition. Here the roof penetrating structure 19 in the form of a window is mounted in the roof 50. The window comprises a first 16 and a second side member 18, connected by a bottom 17 and a top member (not shown). The roof 50 is covered by undulated roof covering elements 51 in the form of tiles. The flange member 40 is easily formed according to the shape of the tile, and the tile resting above the flange member 40 is brought close to the tile the flange member rests upon. The flange member may be stretched so that it can reach over the undulated roof covering elements 51. The flange member is not corrugated but is a flat piece of material. A close-fitting flashing assembly is thereby provided.

Fig. 3 shows another embodiment of the flashing assembly in the mounted condition. In addition to the features mention under fig. 2, the flange member 40 has been cut off after being mounted, such that the flange member substantially does not extend out from between the roofing elements 51, but instead is in line with the bottom edge of the roof covering element 51 resting upon the flange member 40. The flange member 40 has a bottom edge 45 extending across the inclination direction ID, perpendicularly to the second edge 32 of the skirt member. That way the flange member is substantially invisible in the mounted position.

Fig. 4 shows an embodiment of a cross section of the flange member

40. The main layer 41 makes up about 90% of the volume of the flange member. The main layer 41 is in this embodiment is butyl rubber. The main layer 41 may be made out of EPDM instead or another rubber with similar plastic properties. The top layer 44 facing the exterior is a layer of UV

DK 181067 B1 13 protection. This could be dispensed with, in particular in cases were the bottom part of the flange member is cut off, so that it is in line with the roof covering element. A second layer 42 comprising butyl rubber and resin is positioned below the main layer 41. This layer is elastic and has adhesive properties. The third layer 43 is a release liner, so the flange member 40 is easier to work with during mounting, as the second layer 42 is somewhat sticky. The third layer 43 is removed before mounting of the flange member 40. The third layer 43 could be dispensed with as well. Fig. 5 shows a cross section of a snap fitting 60 between the flange member 40 and the skirt member 20. The snap fitting comprises a protrusion 62 on the flange member 40, preferably extending along the edge of the flange member 40 facing the skirt member, and an omega shaped engagement means 61, enclosing the protrusion 40. The layers of the flange member and the skirt member is not shown.

Fig. 6 shows another embodiment of the flashing assembly in a semi mounted condition. Here it can clearly be seen how the flashing member 40 are modelled according to the roof covering elements and stays in place after it has been stretched into position. The plastic properties of the flange member help to keep it in place.

Fig. 7 shows an embodiment of the flashing assembly in a mounted condition. Here it can in particularly be seen how the whole window appears, when the bottom edges 45 of the flange members is in line with the overlaying roof covering elements 51.

Fig. 8 shows an embodiment of the flashing assembly in a mounted condition. Here the skirt member 20 and the flange member 40 are in one piece and comprising a layer of the same material. They may be made of the same material throughout. The flange member 40 has been cut such that the bottom edge of the flange member 40 is substantially aligned with the bottom edge 45 of the roof covering element 51 positioned on top of the flange member 40.

DK 181067 B1 14 Similar reference numbers are used for similar features throughout the application.

Features from the first aspect may be combined with features from the second aspect and third aspect and vice versa and features from the different embodiments may be combined freely.

Claims

DK 181067 B1 15 PATENT CLAIM

1. Roofing arrangement — (60) for use with a roof-penetrating structure (19), preferably a window, in a pitched roof (50) of a building, wherein the pitched roof (50) has a pitch direction and has roofing elements (51) wherein the roof penetrating structure (19) has a top member and a bottom member (17) which extend across the direction of inclination, and a first side member (16) and a second side member (18) which connect the top member to the bottom member (17) and extend in the direction of inclination, where the covering arrangement (60) comprises: - a skirt element (20) which is configured to at least partially cover the roofing elements (51) facing the bottom of the roof-penetrating structure (19), where the skirt element (20) has a first edge (31) and a fourth edge (34) to extend across the direction of inclination, the fourth edge (34) being opposite the first edge (31), - a flange element (40) which is placed in extension of the skirt element (2 0) and the first (31) and the fourth edge (34), so that the flange element (40) is suitable to be placed at the first (16) and/or the second (18) side element of the roof-penetrating structure (19) respectively ), - where the flange element (40) has an inner surface which is arranged to face in an internal direction towards the interior of the building, where the flange element (40) is arranged to lie flat and follow the surface of the roofing elements (51), where the flange element (40) can be shaped to substantially permanent deformation, characterized in that the flange element (40) comprises an elastomer that is plastic and/or a textile, and in that the flange element (40) is not corrugated but is a flat piece material.

2. Covering arrangement (60) according to claim 1, where the flange element (40) is stretchable and/or gradually wider towards the bottom.

A cover arrangement (60) according to any one of the preceding claims, wherein the inner surface is adhesive.

DK 181067 B1 16

A covering arrangement (60) according to any one of the preceding claims, wherein the flange member (40) comprises a main layer (41) comprising an elastomer which is plastic and a second layer comprising an elastomer which is elastic.

5. Covering arrangement (60) according to any one of the preceding claims, wherein the flange element (40) comprises canvas, wherein the material(s) for the canvas is preferably selected from a group consisting of flax, hemp, cotton, nylon, polyester, aramids, and carbon fibers.

6. Covering arrangement (60) according to any one of the preceding claims, wherein the flange element (40) is laminated and/or impregnated and/or vulcanized.

A cover arrangement (60) according to any one of the preceding claims, wherein the flange member (40) comprises metal particles such as iron oxide.

Cover arrangement (60) according to any one of the preceding claims, wherein the flange element (40) has an elongation at break of more than 250%, preferably more than 300%.

9. Cover arrangement (60) according to claim 4, where the flange element (40) comprises material selected from a group consisting of ethylene-propylene-diene monomer (EPDM) and butyl, and where the second layer preferably comprises butyl and/or resin.

A roofing arrangement (60) according to any one of the preceding claims, wherein the flange element (40) is configured to be located at least partially between the roofing elements (51).

Cover arrangement (60) according to any one of the preceding claims, wherein the flange element (40) has a thickness between 1.5-4 mm, preferably between 1.5-3 mm in a pre-assembled state.

12. Covering arrangement according to any one of the preceding claims, wherein the flange element (40) and the skirt element (20) form one part or in

DK 181067 B1 17 the smallest part of a layer of material.

13. Cover element (60) according to any one of claims 1-11, wherein the flange element (40) and the skirt element (20) are attached to each other via a connecting element, such as a snap fitting (60) and/or an adhesive.

14. Cover arrangement (60) according to any one of the preceding claims, wherein the flange element (40) comprises a filler, preferably chalk.

15. Method for mounting a covering arrangement (60) comprising the steps: - mounting a covering arrangement (60) according to any one of claims 1-14 in the roof, - mounting the roofing elements (51) so that the at least one flange element ( 40) is at least partially covered by the roofing elements (51), - to remove a part of the flange element (40) that extends from between the roofing elements (51), thereby straightening a bottom edge (45) of the flange element (40) in after a bottom edge of the roofing elements placed on top of the flange element (40).

Roof structure comprising roofing elements (51) and a covering arrangement (60) according to any one of claims 1-14.

17. Roof structure according to claim 16, where the flange element (40) of the covering arrangement (60) is located between the roofing elements (51), and where a bottom edge of the flange element is substantially aligned with a bottom edge of the roofing elements (51) that covers the flange element ( 40).