AT517223B1 - Joint seal between insulation elements for building insulation - Google Patents

Abstract

A system for building insulation is described. According to the exemplary embodiments described here, the system has a first insulating element and at least one second insulating element, which are arranged in front of a building wall to be insulated in such a way that at least one first joint is formed between two adjacent insulating elements. The system further includes a first seal and a second seal disposed in the first joint between two adjacent insulation members such that a first cavity is formed in the first joint between the seals and the two adjacent insulation members, wherein in the second seal at least one opening for discharging water from the first cavity is arranged to the outside.

Description

description

JOINT SEAL BETWEEN INSULATED ELEMENTS FOR BUILDING INSULATION

The invention relates to a device for sealing joints between insulating elements, which are used for the insulation of buildings.

The thermal insulation of existing building facades nowadays makes an important contribution to energy conservation and thus to environmental protection. In particular, by reducing transmission heat losses, ie losses caused by heat transfer through the building envelope, a subsequent reduction of the heating energy requirement of existing building fabric to reach. Such a reduction takes place for example by the insulation of the outer walls of the building by means of suitable insulation elements. Suitable insulating elements are known for example from the publication AT 512 629 B1.

DE 196 104 13 A1 describes a thermal insulation panel with vertical drainage channels. EP 0 127 824 A2 describes an insulating element with vertical drainage channels which are molded into the insulating element during its manufacture. EP 0 874 089 A2 describes insulating drainage elements made of rigid plastic foam for use in the soil. JP H091 841 59 A describes an insulating element for underground mounting.

In new buildings an insulation is relatively easy to integrate, however, the subsequent insulation of old buildings is problematic. Commonly used on existing building walls glued composite thermal insulation systems. In all systems, it is important that no rear ventilation occurs between the existing wall and the insulation elements, since otherwise the insulation effect is not sufficiently given. The attachment of insulating elements to an existing wall usually results in more or less large voids being created between the existing outer wall of the building and the insulating element. Temperature fluctuations can lead to the formation of moisture in this cavity. Even the slight penetration of rainwater into the cavities through gaps in the subsequent insulation can not be excluded. This moisture, if it does not dry quickly, for example, contribute to mold growth and thus cause long-term damage to the building. There is a conflict of objectives between effective (as tight as possible) insulation and prevention of waterlogging behind the insulation elements or in joints between two adjacent insulation elements.

The object underlying the invention is therefore to provide an insulating element which allows both sufficient insulation and a quick removal of moisture in the cavities.

A system for building insulation is described. According to the exemplary embodiments described here, the system has a first insulating element and at least one second insulating element, which are arranged in front of a building wall to be insulated in such a way that at least one first joint is formed between two adjacent insulating elements. The system further includes a first seal and a second seal disposed in the first joint between two adjacent insulation members such that a first cavity is formed in the first joint between the seals and the two adjacent insulation members, wherein in the second seal at least one opening for discharging water from the first cavity is arranged to the outside.

Furthermore, a method for insulating a building wall is described. According to the embodiments described herein, the method comprises attaching a first seal and a second seal on at least one side surface of a first Dämmelements and suspending the first Dämmelementes on the building wall by means of anchor elements. The method further comprises suspending a second insulating element on the building wall with the aid of anchoring elements such that at least one first joint is formed between the insulating elements and in the first

Groove between the seals and the insulating elements creates a first cavity. In the second seal at least one opening is provided for discharging water from the first cavity to the outside.

The invention will be explained in more detail with reference to the examples shown in the figures. The figures are not to scale and show only those aspects which are relevant to the following description and to the principles underlying the invention. The figures show: [0009] FIG. 1 an isometric representation of an insulating element with circumferential

Sealing tapes for sealing the joints between the insulating element and adjacent insulating elements; Figure 2 is an isometric view of two adjacent insulation elements ge according to FIG. 1; Figure 3 is a side view of a mounted on a facade insulation element with circumferential sealing bands for sealing the joints between the insulation element and adjacent insulation elements and with sealing strips between the insulation element and the building wall; Figure 4 is a front view with several mounted on a facade Däm melementen with arranged in the joints between adjacent elements sealing strips.

In the figures, like reference numerals designate the same or similar components, each having the same or similar meaning. FIGS. 1 to 4 all show the same insulating element or an arrangement of a plurality of similar insulating elements on a building wall.

Figure 1 shows an isometric view of an insulating element 1. Figure 2 is a similar representation of two adjacently arranged one above the other insulating elements 1a and 1b, which are each constructed the same. As a rule, insulating elements for the insulation of facades are (approximately) cuboid, ie they have a rear-facing main surface 12 facing the facade (see also FIG. 3), a front side main surface 11 lying parallel thereto, and upper, lower and lateral (left-side and right-side) side faces. In Fig. 1, the right side surface is denoted by 13 and the upper side surface by 14. Commercially available, prefabricated insulation elements are usually manufactured as a sandwich construction, ie two cover layers with intermediate insulation core. The cover layers can be made of wood, metal or plastic. At least one of the cover layers can be provided with a plaster layer. Many known insulation systems are laborious on the one hand in the production, on the other hand have a high weight and require for their attachment a lot of craftsmanship on the site. In addition, the assembly is associated with noise and pollution for residents of the building to be insulated. Since the sandwich constructions often also have a high proportion of window surfaces, their production is technically complex and correspondingly expensive. Insulating elements can be produced in a simpler and more favorable way by coating an insulating body of thermal insulation material at least partially (for example in the area of the corners and edges) with adhesive which, after curing, gives the insulating element a self-supporting structure (so to speak a "skeleton") Adhesive filler, for example, whose material base essentially contains cement, sand and adhesion promoter is considered.) Such an insulating element is described, for example, in the publication AT 512 629 B12.

When installing insulation elements creates a gap between two adjacent insulation elements, which must be sealed to ensure adequate thermal insulation of the facade. For this purpose, sealing strips 21 and 22 are used in the present example.

The sealing tapes can be designed to be self-adhesive. As sealing tapes, e.g. so-called Kompribänder (also stop bands or waterstops) into consideration.

Compriband is commonly understood to mean a precompressed, impregnated foam (e.g., polyurethane-based) sealant tape which slowly expands after insertion into a joint and fits snugly against the seam edges. Compribands are used, among other things, to ensure watertightness on facades and are available in various stress groups (defined, for example, in DIN 18542). Watertightness describes the ability of a building structure or gasket to resist rainwater and is e.g. defined in EN 12208. Regarding the sealing of the joints between insulating elements, "tight" means that a desired watertightness is ensured.

According to the present example, a first seal extends parallel to the edges of the front side major surface 11. This seal is provided by at least one sealing band 22, e.g. formed a compriband. This sealing tape 22 is arranged along the edges of the front-side main surface 11 of the insulating element 1 and can either directly touch the edge or (as shown in Fig. 1) be slightly set back so that a distance between the sealing strip 22 and the edge of the front-side main surface 11 is maintained , A second seal runs approximately parallel to the first seal and is formed by the sealing strip 21. The second sealing band 21 runs along the edge of the rear main surface 12 and touches the edge in the illustrated example, but this need not necessarily be the case. Alternatively, the sealing tape 21 may also be set back from the main back surface 12.

Due to the parallel arrangement of the two sealing strips 21 and 22 are formed in the joint cavities, on the one hand by the sealing bands 21 and 22 and on the other of two facing side surfaces of adjacent insulating elements (see, for example, Fig. 2, insulating elements 1a, 1b) are limited , Between the upper side surface of an insulating element and lower side surface of an adjacent insulating element is formed in the horizontal direction x extending cavity 30 (horizontal joint). Similarly arises between left side surface of an insulating element and right side surface of an adjacent insulating element in a vertical direction z extending cavity 29 (vertical joint). Sufficient thermal insulation is ensured by the (continuous) air-filled cavities 29, 30, but (drainage) measures are needed to prevent waterlogging between the sealing bands 21 and 22 and to discharge water (e.g., condensed water) to the outside. For this purpose, an opening 31 can be provided in the front sealing band 22, through which water can be conducted from the interior of the cavity to the outside.

In order to improve the drainage, a web 23 may be disposed between the two sealing bands 21 and 22, which is realized for example by means of a relatively short piece Kompriband. The web 23 may have a slope towards the opening 31, so that water is collected in the vertical cavity between the sealing bands 21 and 22 on the web 23 and discharged through the opening 31 to the outside. At the same time the web 23 divides the cavity 29 in the vertical joint in mutually sealed parts, so that a flow of air (which may affect the insulation effect) prevented. Similarly, a further web 24 on the upper side surface 14 of an insulating element 1 (as well as in 1a, 1f in Fig. 2) share the cavity in the horizontal joint in mutually sealed parts, so that a flow of air through the horizontal joint 30 prevents becomes. However, waterlogging in the horizontal joint can flow off into at least one vertical joint and be discharged from there through the opening 31.

In view of the desired watertightness, the relatively small opening 31 is unproblematic. The opening 31 may be realized by a recess in the sealing strip 22. It can also be used with water-permeable material, e.g. Damp wool be lined, whereby a flow of air through the opening 31 braked and insects are prevented from entering, but water can flow. In this context, an opening is present and "open" when water (at least slowly) can drain.

In Figure 3, the suspension of the insulating elements 1, 1a, 1b, etc., is shown on a building wall 2 based on a side view. In the example shown, the insulating elements by means of anchor elements 41 and 42 are attached to the wall 2. Anchor elements 42 are fixed to the insulating element, while anchoring elements 41 (for example anchor channels) are fastened to the wall 2 (usually screwed on). For mounting a Dämmelements 1 whose anchor elements 42 are suspended in the associated anchor elements 41 on the wall 2. Different variants of the installation of a Dämmelements 1 on a building wall are known and are therefore not explained in detail. In the side view shown in Fig. 3, two planes A and B are also located, which are substantially parallel to the building wall 2. The sealing strips 22 and 21 extend substantially along the line of intersection formed by a section of an insulating element with the plane A and B, wherein the most visible, front-side main surface 11 of the insulating elements 1 (or 1a, ..., 1f) also is substantially parallel to the building wall 2.

Between the building wall 2 and the rear main surfaces of the insulating elements also remains a cavity 40, which is designated in Fig. 3 with the numeral 35. In order to dissipate moisture and water from the cavity 40 behind the insulation elements to the outside, 23 (drainage) openings 32 may be disposed in the rear seal so that water from the cavity 40 behind the insulating elements through the openings 32 in the vertically extending joints (ie into the cavity between the sealing bands 21 and 22) and from there (via the openings 31) can be derived to the outside. In order to improve the drainage of water from the cavity 40 behind the insulation elements can be arranged between wall 2 and the insulating elements (see Figure 4, insulating elements 1a to 1f) inclined webs 25, collected with their help water and to the openings 32 in the sealing strips 22 can be passed. For this purpose, the openings 32 in the rear sealing strips 22 are approximately at the upper edge of the inclined webs 25 (see side view in Fig. 4). The webs 25 may e.g. also be realized with the help of Kompribändern. However, the drainage from the cavity 40 may also be otherwise realized so that the sloping lands 25 and the openings 32 are merely optional.

Figure 4 shows a front view of a series of juxtaposed insulating elements 1a, 1b, 1c, 1 d, 1e and 1f. In this view, the front-side main surfaces of the insulating elements 1a to 1f and the front-side sealing strips 22 in the joints between the insulating elements. Shown are also the openings 31 which are arranged in the sealing bands 22 in the vertical joints. To the left and right of the insulating elements, a part of the anchor rails 42 can be seen, in which the insulating elements 1a to 1f with their anchor elements 41 (hidden in Fig. 4, but see Fig. 3) are mounted. The inclined webs 25 are shown in dashed lines, where they are hidden by the insulating elements.

As can be seen with reference to FIG. 4, the cavity 40 between insulating elements 1a, 1b, ... 1f divided by the substantially left-to-right webs 25 in the vertical direction z into several parts. By further, substantially from top to bottom (eg vertical) extending webs 26, the cavity 40 is divided in the horizontal direction x into several parts, so that essentially per insulating element (or per group of insulating elements) in a horizontal direction x and vertical direction z delimited cavity segment arises. As a result, an air flow and consequently a heat convection between the building wall 2 and insulation elements is reliably prevented.

The webs 26 may also be realized by means of compression ribbons, but other materials (e.g., nip felt) may also be used.

Of the webs 25 need not necessarily extend over the entire wall along an oblique line. For wider walls and many adjacent insulating elements, the webs 25 extend only partially along an oblique line from right to left, and in the adjacent section follows the same web (in Fig. 4 with 25 '), but offset laterally (horizontally).

In the front view of FIG. 4 can also be seen that the seals 21, 22 in the horizontal direction x (in the vertical joints 29) and vertical direction (in the horizontal joints 30) are clamped (but not in a Direction normal to the wall). The clamping takes place when using compression bands, e.g. through the expansion of the Kompribänder. The clamping forces, which hold the seals, so are essentially in the planes A and B and thus parallel to the outer wall. 2

In the following, some aspects or features of the described embodiments will be summarized with reference to FIGS. 1 to 4. It should be noted, however, that the following list is not exhaustive but merely exemplary. According to the exemplary embodiments described here, the system for building insulation has a first insulating element and at least one second insulating element (see eg FIGS. 2 and 4, numbers 1a and 1b) which are arranged in front of a building wall 2 to be insulated in such a way that at least one first joint (eg vertically extending joint 29, see Fig. 1) between two adjacent insulating elements 1a, 1b is formed. The system further comprises a first seal 21 and a second seal 22, which are arranged in the first joint between two adjacent Dämmelementen 1a, 1b such that in the first joint between the seals and the two adjacent Dämmelementen 1a, 1b, a first Cavity is formed, wherein in the second seal 22 at least one opening 21 for discharging water from the first cavity is arranged to the outside.

In the first joint (e.g., vertically extending groove 29), at least one ridge 23 may be arranged which is disposed in the first cavity such that it directs water towards the opening 31. The at least one web 23 can be realized by a sealing tape, for example by a Kompriband. The sealing strip then runs in the first cavity obliquely from the first seal 21 to the opening 31 in the second seal. Also, the first seal 21 and the second seal 22 may be constructed by means of sealing strips, for example, Kompribändern. Both seals 21 and 22 are respectively clamped between two adjacent insulating elements and the resulting clamping forces act substantially parallel to the building wall 2 act (and thus also parallel to the front main surface 11 of the insulating elements). The web 23 not only diverts the water, but may also hinder air circulation in the cavity 29 formed in the vertical joint. Even in the cavities formed in the horizontally extending joints 30 between the seals 21 and 22, webs 24 which extend between the two seals 21 and 22, obstruct air circulation.

According to one embodiment, the first seal 21 is arranged on the side of the first joint facing the building wall 2 (for example vertical joint 29), whereas the second seal 22 is arranged on the side of the first joint facing away from the building wall 2. The insulating elements 1a, 1b,... 1f can thus be arranged in front of the building wall 2 such that a second cavity 40 is formed between the insulating elements 1a, 1b,... 1f and the building wall 2. In order to drain water from the second cavity 40 into the first cavity (in the vertical gap), according to one embodiment at least one further opening 32 may be arranged in the first seal 21. In the second cavity 40 (between the building wall 2 and the insulating elements 1a, 1b,., 1f) at least one further web 25 can be arranged obliquely and with respect to the at least one further opening 32 such that it collects water and at least one further opening 32 in the first seal 21 passes. So water can flow from the cavity behind the insulation elements in the cavities in the vertical joints between the insulation elements and be discharged from there to the outside.

The at least one further web 25 extends substantially from left to right, so that it divides the second cavity 40 in the vertical direction into at least two parts, whereby an air flow through the second cavity 40 is at least hindered. In the second cavity 40 between the building wall 2 and the insulating elements of Weite ren additional, from top to bottom extending webs 26 may be arranged, which share the second cavity 40 in the vertical direction in at least two parts. Together, the webs 25 and 26 divide the cavity 40 behind the insulation elements into several closed segments, whereby air circulation is hindered.

An example of the invention relates to a method for insulating a building wall. According to the embodiments described herein, the method comprises attaching a first seal and a second seal on at least one side surface of a first Dämmelements and suspending the first Dämmelementes on the building wall by means of anchor elements. The method further comprises suspending a second insulating element on the building wall with the aid of anchoring elements such that at least one first joint is formed between the insulating elements and a first cavity is formed in the first joint between the seals and the insulating elements. In the second seal at least one opening is provided for discharging water from the first cavity to the outside.

The first and the second seal 21, 22 may each be secured along a line which is substantially parallel to a front-side main surface of the insulating element. By suspending the second insulating element 1b, the first and second seals 21, 22 are clamped between the two insulating elements 1a, 1b, wherein the force vectors of the resulting clamping forces are substantially parallel to the front-side main surface.

Claims (14)

claims A system for building insulation, comprising: a first insulating element (1a) and at least one second insulating element (1b) which are arranged in front of a building wall (2) to be insulated in such a way that at least one first joint between two adjacent insulating elements (1a, 1b) is formed; a first seal (21) and a second seal (22) which are substantially parallel to each other (11) and which are arranged in the first joint between two adjacent insulating elements (1a, 1b) such that in the first joint between the seals (21.22) and the two adjacent insulating elements (1a, 1b), a first cavity (29, 30) is formed, wherein in the second seal (22) at least one opening (31) for discharging water from the first cavity is arranged to the outside. The system of claim 1, further comprising: at least one ridge (23) disposed in the groove, disposed in the first cavity for directing water to the orifice (31). 3. System according to claim 1, wherein the at least one web (23) by a sealing strip, for example a Kompriband, realized in the first cavity obliquely from the first seal (21) to the opening (31) in the second seal (22 ) runs. 4. System according to one of claims 1 to 3, wherein the first and the second seal (21.22) by means of sealing strips, for example Kompribändern, are constructed. 5. System according to one of claims 1 to 3, wherein the first seal (21) on the building wall (2) facing side of the first joint and the second seal (22) on the building wall (2) facing away from the first joint are arranged. 6. System according to one of claims 1 to 5, wherein the insulating elements (1a, 1b) are arranged in front of the building wall (2) that between the insulating elements (1a, 1b) and the building wall (2) has a second cavity (40 ) is formed. 7. System according to claim 6, wherein in the first seal (21) at least one further opening (32) is arranged for discharging water from the second cavity (40) in the first cavity. 8. System according to claim 7, wherein in the second cavity (40) between the building wall (2) and the insulating elements (1a, 1b) at least one further web (25) obliquely and with respect to the at least one further opening (32) in such a way is arranged to direct water to the at least one further opening (32). 9. A system according to claim 8, wherein the at least one further web (25) extends substantially from left to right so that it divides the second cavity (40) in the vertical direction into at least two parts, so that an air flow through the second cavity (40 ) is impeded. 10. System according to claim 9, wherein in the second cavity (40) between the building wall (2) and the insulating elements (1a, 1b) additional, from top to bottom extending webs (26), which the second cavity (40) in divides vertical direction into at least two parts, so that an air flow through the second cavity (40) is hindered. 11. System according to one of claims 1 to 10, wherein the first seal (21) and the second seal (22) in each case between two adjacent insulating elements (1a, 1b) are clamped and the resulting clamping forces substantially parallel to the building wall (2). Act. 12. A method for insulating a building wall, comprising: attaching a first seal (21) and a second seal (22) to at least one side surface of a first Dämmelements (1a); Suspending the first insulating element on the building wall (2) by means of anchor elements (41, 42); Suspension of the second insulating element (1b) on the building wall (2) by means of anchoring elements (41, 42) such that at least one first joint is formed between the insulating elements (1a, 1b) and in the first joint between the seals (21, 22) and the insulating elements (1a, 1b), a first cavity is formed, wherein in the second seal (22) is provided at least one opening (22) for discharging water from the first cavity to the outside. 13. The method according to claim 12, wherein the first and the second seal (21, 22) are each secured along a line which is substantially parallel to a front-side main surface (11) of the insulating element (1a). 14. The method according to claim 13, wherein by suspending the second insulating element (1b) the first and the second seal (21, 22) between the two insulating elements (1a, 1b) are clamped so that the force vectors of the resulting clamping forces in Lie substantially parallel to the front main surface (11). 4 sheets of drawings