FI127401B - Renovation arrangement for the external envelope of a building - Google Patents

Abstract

The present invention relates to a renovation arrangement of a building envelope comprising heat insulating elements (2) to be attached to the building exterior wall (1). The thermal insulation elements (2) are fixed at a distance from the outermost surface of the outer wall forming the ventilation slit (7). The venting gap (7) between the inner surface (3) and the outer wall (1) of the heat insulating element (2) is arranged to open to the open air through at least one vent opening (6) at the bottom and top of the heat insulating element. through. The vents (6) are arranged to be closed when the external wall moisture reaches the desired humidity level.

Description

Renovation of the building's outer jacket

The invention relates to a renovation arrangement of a building envelope according to the preamble of claim 1, which comprises heat insulating elements to be attached to the exterior wall of the building.

In Finland, as in many other countries, there are many buildings in need of repair. To remedy them, various renovation elements have been developed, which are suspended, for example, by means of brackets on load-bearing structures. However, these known solutions are generally trade-offs between thermal insulation and sufficient ventilation to avoid moisture problems. WO2014109641 discloses a renovation arrangement having a heat insulating material disposed between the plastic surface sheets. GB 1468534 discloses a heat-insulating element for cold rooms having a heat-insulating material between the surface plates, with ventilation ducts formed therein and ventilation openings formed in the surface plate. GB 2306984 discloses a heat insulating element having a core portion of mineral wool and surface panels covering both sides thereof. Ventilation openings are formed in the inner surface plate. JP H08218596 discloses a heat insulating element having a plastic insulated interior and surface panels.

Apertures are formed in the surface plate of the element, and a ventilation duct is formed in the insulation of the inner part, which opens into the open air. WO 2008145402 discloses a heat insulating element for use as an additional heat insulator. An interior ventilation duct is formed in the interior insulation. FI 126229 discloses a heat insulating element having a core of mineral wool and surface panels covering both sides thereof. At least one opening is formed in the inner surface of the heat insulating element by at least one ventilation duct, which is opened directly or through a separate connecting duct to the open air, in the mineral wool of the core of the heat insulating element.

It is an object of the present invention to provide a reliable renovation arrangement for the renovation of old facades, which element allows for good thermal insulation and, at the same time, adequate ventilation to ensure drying of the old structure.

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To achieve this object, the reorganization arrangement according to the invention is characterized by the matters set forth in the characterizing part of claim 1.

The gap between the inner surface and the outer wall of the heat insulating element is preferably sealed at the peripheral edge of the area defined by the one or more heat insulating elements, wherein one or more vents are formed at the top and bottom of the sealed area. Alternatively, said vents are formed at the top and bottom of the thermal insulation element with a wide edge.

The solution of the invention allows the moisture in the exterior wall structures to be discharged through the ventilation slot and the vents into the open air. This is especially necessary when rebuilding very wet structures. Once the structure has dried sufficiently, the vents can be closed to maintain the best thermal insulation performance. Preferably, the ventilation openings are closed by mechanically actuated closing means provided with a sealing material similar to that used to seal the peripheral edge and sealing the opening. As a sealing material, it is possible to use, for example, soft mineral wool which is preferably covered with an outer edge of a sheet to prevent moisture from entering the sealing material from the outside. The vents can also be formed by leaving the vents at the top and bottom of the heat insulation element fully open. The side edges of the ventilation slot can also be left completely open to further enhance initial ventilation. When the humidity level of the old wall is sufficiently lowered, these vents are closed, for example, by insulated moldings at the periphery of the area defined by one or more thermal insulation elements.

The solution according to the invention enables an effective start of drying and good thermal insulation of the structure after drying, after closing the vents. The repaired structure has a final appearance immediately after repair and provides weather protection to the old structure, preventing it from getting wet. During enhanced ventilation, the ventilation air bypasses the thermal insulation of the new element, so its insulation effect during enhanced ventilation is less than final. The ventilation flow, as well as the insulation levels of the element and the old structure, influence the warming of the air during the ventilation interval. The element protects the old structure and reduces the stress caused by the weather. Pity shielding and warming of the ventilation air enhance the drying of the old structure through the ventilation interval. The ventilation air flow can be influenced by e.g. with the opening portion of the mounting arms and the flow resistances of the air inlet and outlet ports.

The invention will now be further described with reference to the accompanying drawings, in which:

Figure 1 is a schematic schematic view of the vertical insertion of the heat insulating elements, Figure 2 is a schematic schematic view of the insulating elements of the horizontal installation, Figure 3 is a partial sectional view of the sealing element

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Figure 1 shows the arrangement of the heat insulating elements 2 in a vertical installation. The height h of the thermal insulation elements 2 is typically 3-12 m and width 1.2 m.

The ventilation duct in the heat-insulating elements is preferably arranged at the joint 10 between the elements, which duct opens at its upper end to the open air, protected by rain, e.g. by means of a damper (not shown). When the elements are mounted vertically, one or more elements may be vertically mounted on top of each other. For example, if a building is 20 m high, it can have 2 elements 10 m high. In this case, the ventilation preferably takes place at the top and bottom of each element, i.e. also in the horizontal joint between the elements.

Figure 2 shows the positioning of the heat insulating elements 2 in a horizontal installation. The thermal insulation elements 2 typically have a length L of 3-12 m and a width W of 1.2 m.

The ventilation duct in the heat-insulating elements is preferably arranged at a horizontal seam point 11 between the elements, which duct opens into a connecting duct arranged in connection with a vertical seam 12 between elements, which opens from its upper end to the outside, e.g. The ventilation ducts mentioned in Figures 1 and 2 are located in or between the thermal insulation element itself

20165027 prh 02 -01-2018 ducts at the seam which constitute the building's normal in-use ventilation system. The channels may be one or more per element.

Fig. 3 shows a partial sectional view of the installation of the heat insulating element 2 in relation to the outer wall 1 in the region of the upper edge of the element. Preferably, the heat insulating element 2 comprises a core of mineral wool, on which both main surfaces are secured, preferably by gluing, to the surface plates 3, 4, which are preferably plastic coated sheet steel. The mineral wool layer preferably consists of structural wool lamellas in which the fibers are substantially perpendicular to the surface sheets 3, 4.

Figure 3A illustrates the applicant's earlier Finnish patent application FI20155582, whereby a tongue 34 is provided at the horizontal lower edge 32 of the surface sheets 32a, 32b of the plastic coated sheet steel 32, and a tongue-in-cheek opening 32 is provided. 36. The apertures may be multiple and may have different shapes and sizes. The openings preferably have a total surface area of about 10% of the surface area of the inner surface plate, with a minimum of about 5%. The total surface area of the openings may be larger depending on the situation, e.g. up to 15%

80% if the strength of the inner face plate allows it. When the core member is glued to the autosurface panel 32b, the core member is left without an adhesive layer at the openings in the surface board, allowing moisture to pass relatively easily through the mineral wool into the ventilation duct 39 formed in The ventilation duct can be made, for example, by milling a groove of the desired depth and width to the edge of the core part 32c during the manufacture of the heat insulating element. Figure 3A shows an initial formation of ventilation ducts 33 for drying by omitting part of the layer 38 of soft mineral wool. The layer 38 of soft mineral wool is used in this embodiment to smooth out the irregularities of the outer wall 1.

3, the heat insulating element 2 is fastened to the old load-bearing wall 1 by means of separate fastening brackets. The fastening support may be, for example, an elongated hat profile 20 shown in Figure 4 with a

20165027 prh 02 -01-2018 for wall mounting, side surfaces 23, 23 'which may be pre-perforated for inserting mounting means (not shown) into the outer wall. Preferably, the horizontal top and bottom surfaces 21, 21 'of the hat profile are provided with holes 22, 22' which each form about 15-25% of the total surface area 5 of the corresponding top or bottom surface respectively. This perforation allows airflow to pass through the vent slot 7 between the lower and upper edges with the mounting brackets horizontally mounted. The mounting brackets may also be used for horizontal installation of the thermal insulation elements, whereby the mounting brackets are mounted vertically and may be without holes 22, 22 'by providing upper and lower vents for opening in each vent slot between two adjacent vertical mounting brackets. Such hat profiles preferably extend across the entire width of the heat-insulating element to be attached. Of course, many other suitable fastening supports can be used as fastening supports, the metal hat profile shown above being only an example of a preferred embodiment of the fastening support. The mounting brackets may consist, for example, of individual brackets that allow the flow of air to flow freely both sideways and vertically around them.

At the peripheral edge of the heat insulating element 2 there is provided, for example, a sealed portion 5 of soft mineral wool which revolves around an area formed by one or more heat insulating elements. For example, in the representation of Figures 1 and 2, the sealed portion preferably extends along a peripheral edge of an area defined by all elements, whereby a wide area of cavities is formed between the heat insulating elements and the outer surface. At least one vent opening 6 is formed at the top and bottom of this sealed portion, through which openings for enhanced dehumidification venting for initial drying can pass from the bottom vent through the vent slot 7 to the open air 6. The material of the sealed portion can be, for example, soft mineral wool, which is preferably covered with an outer edge of the sheet to prevent moisture from entering the sealing material from the outside. Mechanical seals may be used to close the vents, which may be provided with a soft mineral wool sealing portion of the opening 6. The closure members may be, for example, members hingedly connected to the thermal insulation element 2 or loose members which are brought in when the moisture level in the outer wall has dropped to a certain level. The exterior wall humidity level can be determined empirically from the exterior wall exterior humidity level, whereby the vents can be closed after a certain period of time or preferably by the use of cos6

20165027 prh 02 -01- 2018 teesens, which provide accurate measurement of the right time to close the vents. Enhanced ventilation for initial drying can also be gradually reduced by partially closing the vents before completing the enhanced ventilation. At the end of enhanced ventilation, the in-house ventilation of the building will be handled through in-use ventilation ducts in the thermal insulation elements themselves or separately. The ventilation ducts in the thermal insulation elements or separately arranged also function normally during enhanced ventilation, contributing to the initial drying of the building. When using humidity sensors, the exterior wall moisture can also be actively monitored after closing the vents, and if for some reason the moisture level rises again to an exceptionally high level, the vents can be reopened, if necessary, to provide enhanced ventilation. The vent closing means may also be remote-controlled, if desired, to facilitate their closure and possible reopening.

Initial ventilation can also be accomplished by leaving the ventilation gap completely open at its top and bottom and possibly also at the sides until the ventilation gap is closed, e.g. by insulated moldings, when the old exterior wall reaches the desired reduced humidity level. The insulating material of the insulated strips may be, for example, soft mineral wool or other suitable insulating material. The in-house ventilation of the building is preferably provided through ventilation ducts formed in the heat-insulating elements, where the moisture exiting the building can pass through a cavity closed at its edges.

Above, as an insulating material, there is provided by way of example a mineral wool thermal insulator provided with ventilation ducts 39 between the plastic-coated sheet metal sheets described in the applicant's earlier Finnish patent application FI20155582.

Claims (9)

A remediation arrangement for a building's outer casing, comprising arrangement in the outer wall (1) of the building's heat insulating elements (2; 32), which thermal insulating elements (2; 32) are fixed to a ventilation gap-forming distance from the outer surface of the outer wall; the ventilation gap (7) between the inner surface (3; 32b) of the thermal insulating element (2; 32) and the outer wall (1) is arranged to open to the outside air through the at least one ventilation opening (6; 33) located in the lower and upper edge of the thermal insulating element. were allowed to remove themselves from the outer wall And said ventilation openings (6; 33) are arranged to be closed when the moisture of the outer wall reaches the desired degree of moisture, characterized in that the thermal insulating element (2; 32) has a core part (32c). of mineral wool and surface sheets (3, 4; 32a, 32b) covering the bed sides, which surface panels have one male (35) at one longitudinal edge, and at opposite longitudinal edges a female tension (34), and that in the interior of the thermal insulation element surface plate (3; 32b) has formed at least one opening (37), and that in the core wool mineral element (32c) of the thermal insulating element (2; 32), at least one ventilation duct (39) is opened which opens directly or via a separate connecting channel to outdoor air. , where the moisture is moved through the mineral wool between said At least one opening (37) and ventilation duct (39). Purification arrangement according to claim 1, characterized in that the ventilation gap (7) is densified on a peripheral edge defined by one or more thermal insulation elements, in which the upper and lower edges of the densified area (5; 38) are manifested. 25 has formed one or more ventilation openings (6; 33). Remediation arrangement according to claim 1, characterized in that said ventilation openings are formed in the upper and lower edge of the thermal insulating element throughout the width of the edge. Purification arrangement according to any of claims 1-3, characterized in that the desired degree of humidity is determinable on the basis of experience from the degree of humidity of the outer wall (1) or by using humidity sensors arranged in connection with the outer jacket. 5. Decontamination arrangement according to any of claims 1-4, characterized in that: The heat insulating elements (2; 32) are fixed at a distance within the range of 20-50 mm from the outer surface of the outer wall (1). A decontamination arrangement according to any of claims 1-5, characterized in that the thermal insulating elements (2) are arranged in a vertical position and secured to the outer wall. 10, supported by horizontal straightening support (20), and said horizontal straightening support (20) is provided with openings (22, 22 ') which allow the air in the ventilation gap (7) to move between the lower and upper edge ventilation openings (6). A decontamination arrangement according to claim 6, characterized in that 15 horizontal fixing support is a hat profile (20) of metal, in which the road surface upper and lower surface (21, 2Γ) has been formed openings (22, 22 '), whose total area in each surface is at 15-25% of the corresponding lower surface. or upper surface area. A decontamination arrangement (2) according to any of claims 1-7, characterized in that, The at least one opening (37) of said surface sheet (33b) is covered with a foil material which permits water vapor. Decontamination arrangement (2) according to any one of claims 1-8, characterized in that, as the material of the surface plates (3, 4; 32a, 32b), plastic-coated steel sheet is plated.