WO2004001154A1

WO2004001154A1 - Building element and insulating element for a building element

Info

Publication number: WO2004001154A1
Application number: PCT/EP2003/005090
Authority: WO
Inventors: Andreas Gebing
Original assignee: Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg
Priority date: 2002-06-22
Filing date: 2003-05-15
Publication date: 2003-12-31
Also published as: DE10228002A1; AU2003240649A1

Abstract

The invention relates to a building element for a building wall, comprising at least one metal or plastic profiled element and one heat or sound insulant which is arranged in the profiled element and consists of insulating elements having two parallel interspaced large surfaces which are connected by means of lateral surfaces which extend essentially at a right angle to each other and to the large surfaces. The aim of the invention is to improve one such building element in such a way that the dimensional stability and the insulating action of the insulating material enable an improved building element with few thermal bridges, and that the individual elements of the building elements can be produced in a cost-effective manner. To this end, the heat and/or sound insulant (4) in each profiled element (3) consists of at least two interconnected insulating elements (8, 12). A first insulating element (8) is preferably essentially fully integrated into the profiled element (3) in a blocking manner in such a way that it fills the same, and a second insulating element (12) is located on a large surface (13) of the first insulating element (8).

Description

Building element and insulation element for a building element

The invention relates to a building element for a building wall, in particular a cassette wall or facing shell or a building roof, with at least one profile element made of metal or plastic and a heat and / or sound insulation made of insulation elements arranged in the profile element, the two elements running parallel to one another and spaced apart have a large surface area which are connected via side surfaces which run essentially at right angles to one another and to the large surface areas. Furthermore, the invention relates to an insulating material made of mineral fibers, in particular stone wool and / or glass wool, in the form of insulating material sheets, insulating boards, insulating felts or the like, for installation in a building element, in particular in cassette walls, facing shells or building roofs for sound and / or thermal insulation , consisting of a mineral fiber body with two large spaced and parallel aligned surfaces and these connecting, perpendicular to each other and aligned to the large surfaces side surfaces.

The outer walls of industrial or other halls are clad, for example, with profiled sheets, which in turn are attached to lightweight metal constructions using bracket technology using blind rivets or self-drilling screws. The linear holding structures can be arranged vertically or horizontally on the supporting wall shell made of, for example, concrete, masonry or a further sheet metal shell or its supporting structure. Vertical support structures are usually only connected to the load-bearing wall shell or substructure at a few points. The horizontal brackets are often made of Z-shaped sheets. Adhesions of this type are also arranged on flat roofs or parapets to fasten metallic roof seals.

The best-known profile shapes are trapezoidal or wave-shaped, further examples ■ can be found in DIN 18807 or in the catalogs of the relevant manufacturers. To The well-known profile designs also include the standing seam profile and the cassette profile with belt beads.

The sheets can be made of sheet steel or aluminum, for example. Claddings made of wood, wood-based materials or GRP are also used.

So-called wall cassettes are a frequently encountered form, for example according to EP 0 849 420 A1. In principle, these cassettes consist of sheets which are folded in a U shape and provided with reinforcing beads. The legs of the cassette itself are again bent in the same direction at right angles. The cassettes are fastened one above the other on the load-bearing wall so that the legs meet once and their folded ends overlap. The overlapping legs form webs to which clothing panels or sheets can be attached. Both the actual legs of the cassettes and the webs can have stiffening profiles (beads). With some cassettes, the ends of the webs are also bent inwards again or run into a corrugation in the same direction.

The voids between the inner wall shell and the outer cladding are completely or partially filled with insulation.

The distances between the console-like holding structures and the heights of the cassettes vary between approx. 450 - 1000 mm. The numerous metallic connections between the outer cladding and the inner wall shell create a large number of massive thermal bridges, which significantly reduce the insulation effect and thus lead to high transmission heat losses from the walls and, of course, the corresponding roof structures. Additional heat losses also occur if the insulation materials are not pressed into the cassettes in a joint-tight manner so that outside air flows against the inner wall shell. However, these constructions have further disadvantages. The thermal bridges regularly cause condensation to form in the wall structures, which in turn impair the insulation effect and can cause corrosion damage. In the event of a fire, the thermal bridges promote energy transmission through to fire propagation. The soundproofing of such constructions is low despite the cavity damping due to the mineral wool insulation materials mostly used and the inherently low stiffness, in particular the light bracket constructions.

It is now known to decouple the outer clothing from the substructure by installing an intermediate layer. In order to be able to absorb the forces caused by dead loads, thermally induced tensions and wind suction loads, strips of inherently solid materials, such as fiber cement, calcium silicate or similar substances, are attached to the substructures with the help of screws before attaching the clothing materials. These materials have a relatively high thermal conductivity compared to the insulation materials, so that the thermal bridge effect is not mitigated far enough. This design is also relatively complex and is therefore limited to special cases.

DE 298 02 495 U1 describes an insulation board further developed for wall cassettes together with their application. The mineral wool insulation board has the outer height of the wall cassette. On the upper side surface of the insulation panel there is an incision into which the downwardly angled, web-shaped legs of two wall cassettes engage from above. The incision is made in such a way that the insulation layer slides over the outer web of the stacked wall cassettes and thereby covers them. The insulation board used has low bulk densities so that the board can essentially adapt to the contours of the wall cassette. In order to be able to transfer significant forces from the cladding to the substructure, the insulation board has a higher strength in the outer areas, which is achieved by a higher bulk density. In addition, however, to set a defined distance between the clothing and the retaining structure, spacer elements made of a low thermal conductivity material are inserted into the horizontal joints between the insulation boards. These profile-like spacer elements are supported on the cassette webs, but are not firmly connected to them.

WO 00/77318 describes a similar insulation board and its use. Here, too, the angled webs of the two stacked cassettes reach from above into an incision made on a side surface of a mineral wool insulation board. The bulk density of the mineral wool insulation layer should progressively increase slightly from the inside to the outside from a low value of around 35 kg / m ³ to a high value of around 65 kg / m ³ on the outside. The fibers of the insulation board can also be arranged perpendicular to the large surfaces, which corresponds to a so-called lamella board. Sub-areas of the outer, more highly compressed plate zones therefore lie on the ridges mentioned here. As usual, the outer linings are attached point by point, for example by screws.

In these known wall constructions, the self-weight of the clothing sheets is intercepted by support brackets on the foot and / or by hanging devices on the head. The screws screwed into the horizontal webs of a wall cassette serve to absorb the loads caused by wind suction and, of course, to connect the individual shots of the sheets to one another.

A particular problem in the case of the wall constructions mentioned, however, also generally arises from the fact that the angled webs of the wall cassettes during assembly of the insulation boards by penetrating the narrow incision on the side surface of the insulation boards exert a strong lateral pressure on the material of the insulation boards on both sides of the incision exercise. As a result, the material of the insulation panels can be deformed unevenly in the area next to the webs on which the fastening screws are screwed in. This not only has an adverse effect on the required accurate and dimensionally correct fastening of the insulation panels to the wall structure, but also It can also make it difficult to properly attach an outer skin or outer cladding to the outside of the insulation panels to the extent that cold bridges can result from dimensional deviations due to deformation and compression of the insulation panels, which can severely impair the insulation effect of the entire facade construction.

For the rest, previously known building elements of the generic type often have the disadvantage that dimensional tolerances of the profile elements cannot always be compensated for by the thermal and / or acoustic insulation used. Furthermore, the installation quality must be taken into account when installing the acoustic and / or thermal insulation Attention, which requires special attention especially in the area of flanges, which ultimately complicates the assembly and makes it more expensive due to the time required.

The invention is based on the task of improving a building element and an insulating material of the type mentioned at the outset and intended for the building element in such a way that the dimensional stability and thus the insulating effect of the insulating material is an improved building element poor in thermal bridges, while at the same time the individual elements of the building element can be manufactured inexpensively allows.

The solution to this problem is solved according to the invention in a building element according to the preamble of claim 1 in that the thermal and / or sound insulation in each profile element consists of at least two insulating elements which are connected to one another, a first insulating element clamping in the profile element, preferably the profile element, is installed essentially completely filling and a second insulation element rests on one of the large surfaces of the first insulation element.

In the case of an insulation material according to the invention, the solution to the problem is that the mineral fiber body consists of two interconnectable, there is preferably gluable insulating material elements, of which a first insulating material element can be installed by clamping into a profile element, preferably the profile element essentially completely filling and a second insulating material element resting on one of the large surfaces of the first insulating material element.

The invention has the advantage that the building element is insulated in two layers, so that even with regard to the dimensional accuracy of the first insulation element within the profile element, thermal and / or acoustic insulation is achieved which is improved with regard to the number of possible thermal bridges, so that there are essentially no thermal bridges.

The two insulation elements can have different bulk densities, the insulation element arranged in the profile element having a lower density than the insulation element arranged outside the profile element. For example, the first insulation element arranged in the profile element has a bulk density between 10 and 100 kg / m ³ , preferably between 15 and 50 kg / m ³ , whereas the second insulation material element has a bulk density between 30 and 100 kg / m ³ . The targeted selection of the insulation elements with different bulk densities allows the reduction of the heat transfer, in particular in the overlapping area of flanges, for example adjacent profile elements. It must be taken into account that this area is mainly responsible for an overall poor L value in the case of building elements of the generic type known from the prior art.

At least one insulation element can have a lamination on one or two sides, which is preferably wind and / or airtight. In the case of perforated or otherwise openly designed profile elements, a trickle protective lamination can alternatively or additionally be arranged on one of the large surfaces, namely the large surface facing the profile element of the insulation element arranged in the profile element. There is the possibility ability to form both the first or the second insulation element as well as both insulation elements with a lamination, the lamination being able to be arranged on the outside and / or between the insulation elements.

The second insulation element is glued to the first insulation element arranged in the profile element for simplified assembly. For example, the first insulating element arranged in the profile element and the second insulating element arranged on the large surface of the first insulating element can be glued to one another over part or over the entire surface. Alternatively or additionally, it can be provided that at least one adhesive strip is arranged between the two insulation elements. However, the gluing can also take place between the second insulation element arranged outside the profile element and the profile element itself, adhesive strips also being provided here as suitable construction elements. The adhesive strip preferably has a protective film which is removed immediately before the insulation element is installed. The adhesive strip preferably has a width which corresponds to the width of a flange of the profile element to which the insulation element is to be glued. The second insulation element is fixed by the adhesive bond, while the first insulation element is held in the profile element in a non-positive and / or positive manner. In addition, the first insulation element can also be glued to the profile element.

The arrangement of the adhesive strips described above can sometimes dispense with the laying of joint tapes, since the adhesive strips may cover joints formed between adjacent profile elements and thus provide the required windproofness of the wall construction.

As is known per se, the building element according to the invention is fastened with special screws which remove the wind suction loads of the building element and keep the building element at a distance from the basic structure, for example masonry. The insulation elements are preferably built into the building elements in the form of plates, in particular from mineral fibers. However, other insulation elements are also conceivable both with regard to their geometric configuration and their material components. For example, insulation felts or insulation sheets can be used, or insulation panels made of polystyrene.

The insulation elements are preferably of the same area, so that the assembly is simplified and the installation time can be shortened considerably.

Further features of the building element according to the invention and the insulation material according to the invention result from the subclaims and from the following description of the preferred exemplary embodiments shown in the drawing.

The drawing shows:

Figure 1 shows a first embodiment of a portion of a building wall in a sectional side view and

Figure 2 shows a second embodiment of a portion of a building wall in a sectional side view.

A section of a building wall 1 shown in FIG. 1 consists of a building element 2 in the form of a profile element 3, in which thermal and acoustic insulation 4 is used. The profile element 3 is formed from a metal plate which has angled webs 5 and 6 at its ends. The web 5 is L-shaped, while the web 6 is plate-shaped and is oriented parallel to a section of the web 5 and at right angles to the metal plate of the profile element 3.

At the same distance from the webs 5 and 6, the profile element 3 has a further web 7, which is designed and aligned corresponding to the web 5. Between the web 5 and the web 7 or between the web 7 and the web 6, a first insulation element 8 is arranged, which has a material thickness that is the distance of a shorter leg 9 of the web 5 or the web 7 to the metal plate of the profile element 3 essentially coincides.

The insulation element 8 has a bulk density of 30 kg / m ³ and is essentially compressible due to this bulk density, so that it can be clamped in a simple manner between the leg 9 and the metal plate of the profile element 3. On its surface 10, the insulation element 8 has a lamination 11, which can be designed, for example, as a trickle protection lamination for partially interrupted metal panels of the profile element 3 and / or as an air- and windproof lamination 11.

A second insulation element 12 is arranged on a large surface 13 of the first insulation element 8 and is connected to the first insulation element 8 via an adhesive strip 14. Another adhesive strip 15 is arranged on the upper edge of the insulation element 12 in order to glue the insulation element 12 to the leg 9 of the web 5 or of the web 7. In this way, the insulation element 12 is attached to the profile element 3 in a hanging manner and fixed in its arrangement to the insulation element 8 via the adhesive strip 14.

The insulation elements 8 and 12 are of equal area. The insulation element 12 has a higher bulk density of 70 kg / m ³ compared to the insulation element 8.

In addition, the insulation element 12 can have full or partial lamination 17 on one or both sides of its large surfaces 16.

A first insulating element 8 and a second insulating element 12 each form a mineral fiber body 18. In the lower area of FIG. 1, an insulation element 8 is shown, which has a notch 19 in the area of the leg 9 of the web 7, which notch serves for the simplified assembly of the insulation element 8 in the profile element 3. To assemble the first insulation element 8, the insulation element 8 is inserted with the notch 19 to the leg 9 of the web 7 between the web 7 and the web 6 and then with slight compression parallel to its large surfaces 10 and 13 in the space between the webs 6 and 7 indented. The insulation element 8 is then held positively and non-positively in the profile element 3.

A second embodiment is shown in Figure 2.

In this second embodiment according to FIG. 2, the profile element 3 is perforated. The first insulation element 8 has a lamination 11 as trickle protection. Between the first insulation element 8 and the second insulation element 12, a windproof film 20 is arranged, which can also be designed as a lamination. This film 20 can be arranged both on the first insulation element 8 and on the second insulation element 12.

In the upper section of FIG. 2, the second insulation element 12 has a material thickness that is greater than the space remaining after the first insulation element 8 has been inserted between the metal plate of the profile element 3 and the leg 9 of the web 5. To facilitate assembly of the second insulation element 12, therefore the insulation element 12 has an incision 21 which receives the leg 9 of the web 5.

In the lower part of FIG. 2, the insulation element 12 is dimensioned such that, together with the insulation element 8, it fills the space between the metal sheet of the profile element 3 and the leg 9 of the web 7.

Claims

Expectations

1. Building element for a building wall, in particular a cassette wall or facing or a building roof, with at least one profile element made of metal or plastic and a thermal and / or acoustic insulation made of insulating elements arranged in the profile element, the two elements running parallel to one another and spaced apart have a large surface area, which are connected via side surfaces which run essentially at right angles to one another and to the large surface areas, characterized in that the thermal and / or acoustic insulation (4) in each profile element (3) consists of at least two insulating material elements (8, 12) , which are connected to one another, a first insulating element (8) being built into the profile element (3) by clamping, preferably essentially completely filling the profile element (), and a second insulating element (12) on one of the large surfaces (13) of the first insulating element (8) rests.

2. Building element according to claim 1, characterized in that the insulation elements (8, 12) are designed as plates, in particular made of mineral fibers.

3. Building element according to claim 1, characterized in that the insulation elements (8, 12) are of equal area.

4. Building element according to claim 1, characterized in that the arranged in the profile element (3) first insulating element (8) and that on the large surface (13) of the first insulating element (8) arranged second insulation element (12) are glued to one another over part or over the entire surface.

5. Building element according to claim 4, characterized in that at least one adhesive strip (14) is arranged between the two insulation elements (8, 12).

6. Building element according to claim 1 or 4, characterized in that the second insulation element (12) has an edge-arranged adhesive strip (15) which connects the second insulation element (12) with the profile element (3).

7. Building element according to claim 1 or 4, characterized in that the second insulation element (12) has a different, in particular higher density, from the bulk density of the first insulation element (8).

8. Building element according to claim 7, characterized in that the first insulating element (8) has a bulk density between 10 and 100 kg / m ³ , preferably between 15 and 50 kg / m ³ .

9. Building element according to one of claims 7, characterized in that the second insulation element (12) have a bulk density between 30 and 100 kg / m ³ .

10. Building element according to claim 1, characterized in that the first insulation element (8) is connected to the profile element (3), in particular is glued.

11. Building element according to claim 1, characterized in that the first and / or second insulating element (8, 12) has or have a lamination (11, 17).

12. Building element according to claim 11, characterized in that the lamination (11) on the large surface (10) facing the profile element (3) of the first insulation element (8) is arranged and is preferably formed as a trickle lamination.

13. Building element according to claim 1, characterized in that the lamination (17) between the two insulation elements (8, 12) is arranged and is preferably airtight and windproof.

14. Insulating material made of mineral fibers, in particular stone wool and / or glass wool, in the form of insulating material sheets, insulating boards, insulating felts or the like, for installation in a building element according to one of claims 1 to 13, in particular in cassette walls for sound and / or thermal insulation of a mineral fiber body with two large spaced and parallel surfaces and connecting them, perpendicular to each other and to the large surfaces side surfaces, characterized in that the mineral fiber body (18) consists of two interconnectable, preferably glued insulating material elements (8, 12), of which a first insulating element (8) clamps into a profile element (3), preferably essentially completely filling the profile element (3). is buildable and a second insulation element (12) rests on one of the large surfaces (13) of the first insulation element (8).

15. Insulation according to claim 14, characterized in that the second insulation element (12) has a different, in particular higher, density from the bulk density of the first insulation element (8).

16. Insulation according to claim 15, characterized in that the second insulation element (12) has a bulk density between 30 and

100 kg / m ³ , preferably between 40 and 80 kg / m ³ .

17. Insulating element according to claim 15, characterized in that the first insulating element (8) has a bulk density between 10 and 100 kg / m ³ , preferably between 20 and 50 kg / m ³ .

18. Insulating material according to claim 14, characterized in that the mineral fiber body (18) has a lamination (11, 17) on at least one of its large surfaces (10, 16).