WO2003076735A1

WO2003076735A1 - Thermal and/or acoustic insulation system and insulation element

Info

Publication number: WO2003076735A1
Application number: PCT/EP2003/000933
Authority: WO
Inventors: Gerd-Rüdiger Klose
Original assignee: Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg
Priority date: 2002-03-11
Filing date: 2003-01-30
Publication date: 2003-09-18
Also published as: AU2003205715A1

Abstract

The invention relates to a thermal and/or acoustic insulation system for the insulation of external facades of buildings, in particular as component of a thermal insulation composite system with at least one and preferably several insulation elements, said insulation element embodied as a sheet-like element with two large surfaces and two lateral surfaces connecting the above arranged essentially at right angles thereto. Said elements are suitable for application of a rendering and may be fixed to the external facade by means of an insulation material holder. The invention further relates to an insulation element. According to the invention, an insulation element and a thermal and/or acoustic insulation system for the insulation of external facades of buildings which is simple to produce and suitable for fitting and working using building technology available on building sites, whereby at least one large surface (4), namely the large surface (4) facing the rendering coating has a number of cuts (3) corresponding to the number of insulation holders (6) each of which define a particular region within the large surface (4) and which have a depth which permits the separating off of volumes of insulation material.

Description

Thermal and / or sound insulation system and insulation element

The invention relates to a heat and / or sound insulation system for the insulation of external facades on buildings, in particular as part of a thermal insulation composite system, with at least one, preferably a plurality of insulation elements, which insulation element is plate-shaped, two large surfaces and connecting them, for this essentially has side surfaces arranged at right angles and is suitable for receiving a plaster application and can be attached to the exterior facade by means of insulation holders. The invention further relates to an insulation element.

Heat and / or sound insulation systems and insulation element for use in these systems are known from the prior art. For example, these thermal and / or acoustic insulation systems are referred to as composite thermal insulation systems. Composite thermal insulation systems consist of insulating boards that form an insulating layer and are applied to the outer walls of buildings. To protect the insulation layer and to design the appearance of the outer surfaces, the insulation layer is first covered with a base layer made of a reinforced layer of plaster or mortar or, for example, with a fiber-reinforced filler. The actual surface design is done with a top layer or glued tiles, plastic plates or the like.

Mostly, panels made of expanded polystyrene hard foam (PSE) or mineral fibers, such as rock wool, are used as insulation panels. Insulation boards made of aerated concrete, foam glass, rigid foams, extruded polystyrene (abbreviated to XPS), or polyurethane are also suitable. Hard foam panels have a high compressive strength and a sufficiently high transverse tensile strength at 80 to 100 kPa. With stone wool insulation boards, the strength values depend to a large extent on the structure of the mineral fiber mass, i.e. the bulk density, the binder content and the orientation of the individual mineral fibers. Commercial stone wool insulation boards have bulk densities> 100 kg / m ³ , preferably> 130 kg / m ³ . These insulation boards generally have a length of 800 mm and a width of 625 mm.

Intensive longitudinal and vertical compression of the mineral fiber mass in the direction of production increases the compressive strength in particular in relation to mineral fiber insulation boards in which the individual mineral fibers are stored flat to the large surfaces. The transverse tensile strength of such insulation boards is limited by the fact that the mineral fibers in the near-surface zones continue to be predominantly oriented parallel to the large surfaces. This means that these insulation boards achieve transverse tensile strengths in the range of approx. 15 to 35 kPa. The stiffness of these insulation boards parallel to the large surfaces is significantly lower in the direction of production than transverse to them.

If strips of such insulation boards are cut off at right angles to the large surfaces and parallel to a horizontal compression during the manufacturing process, the mineral fibers are predominantly at right angles to the cut surfaces or the large surfaces of the strips and on the other hand in the direction of the greatest internal rigidity of the insulation boards. Since the maximum height of the insulation panels from which the strips are separated is 200 mm, the strips, which are usually 1.2 m long, are referred to as lamella panels due to the large spreading of the dimensions. These lamellar plates have high compressive strengths, whereby a force-deformation curve is characterized by a steep increase up to the maximum load-bearing capacity and then a significant decrease. The initial deformations are much greater for insulation boards with flat mineral fibers. The transverse tensile strengths for the above-mentioned bulk densities are more than 120 kPa. Since such strength values are not required in the intended application and, on the other hand, the thermal conductivity is relatively high, the bulk density is reduced to approximately 75 kg / m ³ . Slat plates can be easily compressed parallel to the cut surfaces. In addition to these basic types, modifications are also offered. So-called double-layer panels have an approx. 10 to approx. 20 mm to approx. 150 to 210 kg / m ³ highly compressed surface zone. The highly compressed surface zone is usually arranged on the outside in order to create a better load transfer from insulation holders, but in particular to create a layer that is inherently more pressure resistant. In another type of insulation board, thin, so-called primary fleece layers are aligned vertically by an upward and downward pendulum movement and pressed against one another and to the desired height by means of a much smaller longitudinal and vertical compression. The mineral fibers lie flat in the loop areas of the original primary fleece layers, which significantly reduces the transverse tensile strength. If thin surface zones on both large surfaces are removed, large-format insulation boards with high transverse tensile strengths can be produced. The anisotropy of the strength properties is also clear here. The rigidity parallel to the pendulum axis, ie transverse to the original pendulum direction, is also significantly greater here than in the production direction. After removing the outer surface zones, web-shaped compression zones become apparent. This type of insulation board is referred to as web-oriented mineral wool insulation board.

The entire or part of the insulation boards are glued to a prepared surface. The subsurface is largely flat. In the event of larger unevenness, compensation layers are applied to the substrate before the insulation boards are installed. Unevenness up to approx. 2 cm is usually leveled out with the help of an adhesive to be used. So-called construction adhesives, in particular so-called adhesive mortars, have proven successful. These are mostly adhesives that consist of granular aggregates and hydraulically setting binders. These adhesives can contain latent hydraulic substances and these substances that stimulate the adhesive reaction. The cohesion of the adhesive masses and the adhesion to the surfaces to be bonded is ensured by plastics of different compositions made. These plastics have to be resistant to saponification. The adhesive compositions can also be applied as a base layer on the outside of the insulation layer.

Insulation boards made of hard foam (PSE) or rock wool must be glued to at least 40% of their large surface area in accordance with building regulations. In order to secure the edges of the insulation board, in particular, the adhesive is applied in a beaded manner all around, while two or three batches of adhesive in the middle of the insulation board ensure the adhesion and support of the insulation board. This elaborate application method is increasingly being replaced by the mechanical application of the adhesive to the substrate, with the insulation boards then only having to be pressed into the adhesive and aligned.

This bonding technique naturally presupposes that the surface is adhesive and stable. This is usually the case with new buildings. In old buildings, the surface is usually dirty, provided with only weakly adhering paint or other coatings, impregnations or covered with plaster layers with only low transverse tensile strengths.

As a consequence, the substrate would have to be checked carefully before applying a thermal insulation composite system and prepared accordingly. Since it is feared that this care will not be shown in construction practice, the insulation boards in higher buildings have to be mechanically secured with the corresponding loads due to wind suction and then also because of the increasing dead loads with the aforementioned insulation holders.

The insulation holders are mostly made of tough plastic polyamide, and with particularly high loads also of fiber-reinforced polyamide. They are usually produced in one piece using the injection molding process. On

Insulation holder has a mostly round plate with recesses called a plate, the diameter of which is between 40 and 140 mm. The thickness of the plate is approx. 3 to 5 mm and increases on the underside The plate is approx. 3 to 5 mm and rises due to reinforcement ribs on the underside. This plate merges into a hollow shaft, the end of which is designed as a dowel. A steel screw or a bolt can be inserted into the hollow shaft, with the aid of which the dowel is spread open and thus the seat of the insulation holder is achieved, the steel screw or the bolt being considered as rigid cantilever arms when calculating the stability of the thermal insulation composite system.

The head of the steel screw is sunk in the transition between the plate and the hollow shaft. In order to protect the steel screw from corrosion by rain or condensation, the space in which the head of the steel screw is located is closed to the outside with a plastic cover. The length of the hollow shaft depends on the thickness of the insulation layer. Since the thickness of the insulation layer is generally graduated in 2 cm steps, this gradation also applies to the insulation holder.

The insulation holders are usually set after the adhesive has hardened, which of course requires the insulation layer to be sufficiently resistant to the wind suction and self-loading load cases. The inherent loads of thin, but wind-impermeable cover layers can be neglected.

Nevertheless, the bond is not taken into account when calculating the stability of the thermal insulation composite system. However, the bond is regarded as a stiffening element of the insulation board. The form fit between the substrate and the adhesive mass is only taken into account empirically when considering the load case weight as an increase in the resistance to slipping.

In order to set the insulation holder, holes corresponding to the diameter of the dowel must be drilled in the substrate. The insulation holder is hammered into the wall through the insulation layer, whereby the Dowel is spread by driving in or screwing in the steel screw or the bolt. With pressure-resistant insulation layers, the plate of the insulation holder, including the reinforcing ribs, rests on the surface of the insulation layer. In the case of softer insulation layers, for example made of mineral wool insulation panels, the panel can be pressed into the surface of the insulation layer.

Improved fastening is achieved if the insulation holder is placed after the base layer, which is usually reinforced with a glass fiber mesh, has been applied. To do this, the holes must be drilled through the fresh base layer. Due to the unavoidable contamination of the base layer, the craftsmen largely avoid this fastening technology if possible.

With increasing thicknesses of the insulation layers, the steel screw or the bolt has to be dimensioned larger until the load capacity of a bracket is reached. Such a procedure is not only uneconomical, but also leads to considerable thermal bridges, which significantly reduce the effectiveness of the thermal insulation composite system.

Therefore, the number of insulation holders increases significantly as the height of the building increases. The specific number of insulation holders depends on the height of the building, the shear and transverse tensile strength of the insulation material and is higher in the edge area of a building than in the area. The number and the respective arrangement of the insulation holder are specified in the general building inspectorate approval of the thermal insulation composite systems. It is one of the peculiarities of general building inspectorate approvals that the number and arrangement of the insulation holder is designed according to the height of the building and thus the maximum wind suction load and is kept constant over the building height. This is in contrast to the actual loads caused by wind suction, as specified in the relevant standard D1N 1055. On the other hand, this has the advantage that only a uniform fastening scheme is used. This facilitates a factory pre-treatment of the insulation boards designed according to the invention.

For reasons of cost, the thicknesses of the base and top layers have been significantly reduced in recent years. Base layers of up to approx. 1.2 mm and cover layers of approx. 0.5 mm are applied. The plasters, mortars or fillers used contain relatively high amounts of plastic in order to achieve the necessary elasticity and hydrophobicity.

In the area of the panels of the insulating material holders lying on the surface of the insulation layer, the coverage is generally reduced and minimal in the case of thin-layer coverings, so that crack formation must be expected here. However, the emerging panels of the insulation holder are perceived as a very disturbing visual defect. Even with evenly dry or moist top layers, the plates become clearer the darker the top layer. Very sharp contrasts occur when there is little rain and while drying. Even in winter conditions, the insulation holder can easily be identified by the gloss of the surface when the surface of the thermal insulation

Composite system is slightly iced up, while the ice above the plates has already thawed after a little sunlight.

An extremely negative impairment of the appearance also occurs if the insulation holder is not set in a grid, but is set at random. This appearance naturally has a significant impact on the acceptance and thus the sales of the thermal insulation composite systems.

DE 43 19 340 C1 discloses a process for the production of mineral fiber insulation boards for thermal and acoustic insulation of buildings, in particular plaster base boards, loose mineral fibers with a binder and optionally provided with a hydrophobing agent and collected into a mineral wool web, and wherein the mineral wool web is brought to a desired thickness, at least one of the large surfaces of the mineral wool web is provided with depressions in the state in which the binder has not yet hardened, and then for Hardening of the binder is passed through a hardening furnace. In this method, it is provided that pressure-compensating bodies are introduced into the depressions for subsequent plate attachment in such a way that the outer surfaces of the bodies are essentially flush with the surface in question. The pressure-compensating bodies are also made of highly compressed mineral wool and can be cylindrical, spherical or spherical segment-shaped.

This document accordingly shows an insulation board made of mineral fibers bound with binders for the insulation of external facades on buildings, in particular as part of a thermal insulation composite system, the insulation board being suitable for receiving a plaster application and being attachable to the external facade by means of insulation holders.

Furthermore, with these insulation boards, the boards of the insulation holder are on the surface and can also be seen with only small cover layers.

Furthermore, from DE 693 16 284 T2 an insulation element for the insulation of external facades on buildings is known, which is plate-shaped and can be fastened to the external facade by means of screws. This known insulation element consists of a rigid foam, for example expanded polystyrene. Inside, the insulation element has two inserts made of reinforced polystyrene, which are embedded in the insulation board during the manufacturing process by foaming these inserts. Each insert forms a support element for receiving a fastener, namely one

Screw. The inserts consist of X-shaped elements, with a hollow axis element for receiving the screw being arranged in the center. The Hollow axis element is supported via webs, so that there is an overall pressure-resistant element.

The inserts are arranged in such a way that the hollow-axis element extends to an outer surface of the insulation element, so that when the insulation element is screwed onto the facade, the insulation element is not pinched or tied. This is necessary with the insulation element having a groove on two sides and a tongue on two opposite sides, in order to enable problem-free, precisely fitting installation of the insulation elements with interlocking tongues and grooves of adjacent insulation elements.

Above the inserts, the insulation element has two bores, each of which is to be closed with a plug, through which the screws can be inserted into the insert. With this known insulation element, the arrangement of the screws is predetermined by the inserts in the factory. Variations of corresponding insulation elements can only be produced with a relatively large amount of mechanical engineering. In particular, it is not possible to adapt the insulation elements on the construction site to the corresponding building conditions.

Finally, EP 1 088 945 A2 discloses an insulating element made of mineral fibers bonded with binders for the insulation of external facades on buildings, in particular as part of a thermal insulation composite system, which is plate-shaped and suitable for receiving a plaster application and can be attached to the external facade by means of insulating material holders. This known insulation element has markings for the arrangement of the insulation holder, at least on a large surface, a number of markings corresponding to the number of insulation holders required being provided, which are arranged at a distance from the edges. The markings can be arranged in depressions in the insulating element and / or can be formed as depressions, with the markings above the markings after fastening of the insulating element can be used, which consist of mineral fibers and have an increased bulk density compared to the bulk density of the insulating element. This insulation element has proven itself for thermal insulation composite systems.

Based on this prior art, the object of the invention is to create a heat and / or sound insulation system for the insulation of external facades on buildings or an insulation element which can be produced in a simple manner, can be adapted to the building site conditions and can be processed is.

In a heat and / or sound insulation system for the insulation of external facades on buildings, the solution to this problem provides that at least one large surface, namely the large surface facing the plaster application, has a number of incisions corresponding at least to the number of insulation holders , each of which delimit a certain area within the large surface and have a depth which enable volumes to be separated from insulating material.

According to the invention, it is thus provided that the insulation boards preferably have round or angular incisions arranged in a regular grid, which are as narrow as possible to avoid thermal bridges or constraining stresses in the cover layers and, depending on the cutting or milling tools used, between approx. 1 to approx. 5 mm are wide.

The depth of the incisions is at least 10 mm, otherwise 20 mm and is increased by 20 mm in accordance with the shaft length of the insulation holder.

The maximum sinking depth depends on the size of the remaining force-transmitting area of the insulation board, which depends on the material, its strength, the thickness and the height of the insulation layer. At thicknesses of Insulation layer <100 mm, it is advantageous from the application of force and the buckling behavior of the insulation layer to let the insulation holder act on the insulation layer from the outside.

If mineral fiber insulation boards with an external, highly compressed outer layer are used, the sinking of the insulation holder into the compressible insulation body will greatly reduce the force-distributing effect of the outer zone. In such a case, it is provided to insert an insert into a recess created by cutting out a volume of insulating material material along the incisions, said insert being basket-shaped and having at least in its side walls a plurality of openings and in the bottom region a central bore for receiving an insulating material holder. The insert is preferably made of thin sheet metal with a material thickness of less than 0.9 mm, in particular less than 0.88 mm, the openings arranged in the side walls for rapid temperature and moisture compensation between the insulation layer, the insert and the cover layer Contribute so that the above-described disadvantages of marking the attachment point are permanently avoided.

Alternatively, the insert can also be made of plastic or fiber-reinforced plastic and preferably have a radially outwardly directed collar which lies flush on the surface of the insulating element. Of course, inserts made of plastic or fiber-reinforced plastic also have the corresponding openings for moisture and temperature compensation.

According to a further feature of the invention, it is provided that the insert, which is preferably basket-shaped, has projections in the area of its inner lateral surface which engage in the form of barbs in an insertable stopper. These projections, which are consequently preferably aligned in the direction of the base region of the insert, prevent one from falling out in order to improve the insulation effect and to avoid it the above-described disadvantages of known insulation systems used plugs, for example made of mineral fibers.

The insulation layer can have a material thickness of between 150 and 300 mm, for example, and can be formed from sufficiently rigid insulation panels. In this case, each insulation board forms a support for the insulation board arranged above it, so that the insulation layer as a whole only has to be secured against bulging. In this case, the load-bearing capacity of the insulation holder is of secondary importance. Particularly suitable for this purpose are mineral wool insulation boards which are designed as web-oriented insulation boards or which have a layer of increased bulk density directed towards the facade. These insulation boards are to be arranged in such a way that their axis, which indicates the direction of greater internal rigidity, is oriented in the direction of their own load.

The inventive design of a heat and / or sound insulation system for the insulation of external facades or associated insulation elements has the advantage that it can be decided on the construction site where the insulation holder is to be arranged within the insulation panel. In these areas, the volumes of insulation material are then separated out along the incisions. With mineral wool insulation boards, this is easily possible by pulling out the appropriate volume. If necessary, the work can be made easier with a knife. However, if the insulation panels are made of aerated concrete, foam glass, PSE and XPS rigid foam panels, the volumes must be broken out of the insulation material. In this case, it has proven to be advantageous to arrange at least one opening for attaching tools, preferably centrally, within the volumes to be removed. According to a further feature of the invention it is provided that

Insulating element made of mineral fibers in the area of the volumes to be separated out is reduced in its strength by mechanical processing, in particular by compression and / or needling, in order here too is reduced in strength in order to simplify the process of separating the volumes from the insulating material and thus to accelerate the work progress. This embodiment also has the advantage that the plates of the insulation holder compress the insulation material of the insulation plate when screws or bolts are tightened or hammered in accordingly, so that the insulation holder is arranged sufficiently deep in the insulation plate even if the volume of insulation material is not sufficiently removed.

After installing the insulation holder is provided, which is above the

Seal the remaining openings in the insulation elements with a stopper. These plugs preferably consist of the material of the insulation panels which form the insulation layer. As a result, different coefficients of thermal expansion and associated cracks in the cover layer are essentially avoided. In the case of brittle materials, for example aerated concrete, it is advantageous to design the plugs with a smaller size than the remaining opening and to glue them into this opening.

In the case of insulating boards made of mineral fibers, plugs made of mineral fibers are advantageous which have an axis-parallel chamfer / run, since this results in a radial compressibility which enables the plugs to be inserted even if the plugs have larger dimensions than the recess. Such plugs can be cut out of lamella plates, for example, and have a high degree of rigidity in the axial direction.

In addition, combinations of several materials are also possible for filling up the recesses or openings which result from the removal of volumes from insulating material. For example, it can be provided that these recesses or openings are filled with plugs made of mineral fibers and these plugs finally with PSE rigid foam and vice versa. Alternatively, the openings or recesses can be filled with PUR foam in which the plug is inserted and glued.

According to a further feature of the invention, it is provided that the plugs are formed with a layer of adhesive adhesive with which they can be glued to the plates of the insulation holder.

Further features and advantages of the invention result from the subclaims or the following description of preferred exemplary embodiments, which are shown in the drawing. The drawing shows:

1 shows an insulation element for a heat and / or sound insulation system in

Top view;

Figure 2 shows a second embodiment of an insulation element for a heat and / or sound insulation system in plan view;

FIG. 3 shows a third embodiment of an insulation element for a heat and / or sound insulation system in a top view;

Figure 4 shows an insulation element in a sectional side view;

Figure 5 shows a detail of a heat and / or sound insulation system in a sectional side view;

Figure 6 shows a second embodiment of a heat and / or

Soundproofing system in cut side view;

7 shows a third embodiment of a heat and / or sound insulation system with an insert in a sectional side view and Figure 8 shows the insert according to Figure 7 in plan view.

FIG. 1 shows a first embodiment of an insulation element 1 for a thermal and / or sound insulation system 9 for the insulation of external facades 8 on buildings. The insulation element 1 is plate-shaped and has two large surfaces 4, which are arranged parallel and at a distance from one another. The two large surfaces 4 are connected to one another by side surfaces 2 arranged at right angles, the large surfaces 4 being suitable for receiving a plaster application. The insulation elements 1 are fastened to the outer facade 8 with insulation holder 6 to be described below.

In a large surface 4, the insulation element 1 has a plurality of incisions 3, each of which delimits a specific area 5 within the large surface 4 and has a depth that enables volumes to be separated from the insulation material. The volume of insulation material which is to be separated from the surface 4 of the insulation element 1 corresponds to the product of the area of the area 5 and the depth of the incision 3.

In Figure 1, nine areas 5 are shown, which are arranged in the form of a template for the arrangement of the insulating material holder 6 at regular intervals in three columns and three rows on the surface 4 of the insulating element 1. All the incisions 3 are located completely in the area of the surface 4 of the insulating element 1, so that the insulating material holders 6 to be arranged in accordance with the incisions 3 are also arranged completely in the surface 4 of the insulating element 1.

The incisions 3 have a width of 1.5 mm and in the exemplary embodiment shown in FIG. 1 a depth of 10 mm, with a material thickness of the insulating element 1 of 20 mm. The insulation element 1 consists of mineral fibers bound with binders.

FIG. 2 shows a second exemplary embodiment of an insulation element 1 with incisions 3, the insulation element 1 according to FIG. 2 consisting of a rigid foam. In contrast to the exemplary embodiment according to FIG. 1, it can be seen that the insulating element 1 has four circular incisions 3 in the region of its central axis running in the longitudinal direction, which are arranged at a uniform distance from one another. The areas 5 located within the incisions 3, which are to be separated as volumes from the insulating material, have an opening 7 in their central area, which serve to attach a tool, not shown in any more detail. By inserting a suitable tool, the area 5 can be broken out of the insulating element 1 along the incision 3.

In addition, the insulation element 1 according to FIG. 2 has further incisions 3 in the region of its longitudinal side surfaces 2, which are semicircular and end in the region of the side surface 2. Each longitudinally extending side surface 2 has four notches 3, which together with the notches 3 arranged in the central axis each form a column, so that the notches 3 are in turn arranged in several columns and several rows of the insulating element 1.

The areas 5 in the incisions 3 on the side surfaces 2 have no opening 7, since removal of the volumes present there from the outside, i.e. is easily possible via the side surface 2 by inserting a corresponding tool into an incision 3 and breaking out the volume present in the area 5.

Of course, the arrangement of the incisions 3 according to FIG. 2 can be provided not only in the case of an insulation element 1 made of hard foam or aerated concrete, but also in the case of insulation elements 1 which are made of Mineral fibers exist. The same applies to the openings 7, which are useful for insulating elements 1 made of mineral fibers if the mineral fibers are highly compressed with the binder and thus have only a low compressibility.

In addition to the embodiments of the incisions 3 shown in FIGS. 1 and 2, FIG. 3 shows a further embodiment of these incisions 3, which delimit a rectangular area 5. In addition to the areas 5 shown, these can of course also have a different shape, for example a triangular, hexagonal or octagonal shape, by means of appropriately designed incisions 3. In principle, however, the shapes of the incisions 3 or regions 5 shown have proven to be particularly suitable.

FIG. 5 shows a first exemplary embodiment of a heat and / or sound insulation system 9 which is attached to a wall 10 of a building. The heat and / or sound insulation system 9 consists of several insulation elements 1, which are arranged with their side faces 2 adjacent to one another on the outer facade 8, a layer 11 of an adhesive, in particular an adhesive mortar, being arranged between the outer facade 8 and the insulation elements 1 with which the insulation elements 1 are glued to the outer facade 8. FIG. 5 shows an area 5 from which a volume of insulating material has been separated. In this area 5, an insulating material holder 6 made of plastic is used, which consists of a plate 12 and a hollow shaft 13, the hollow shaft 13 being formed in one piece with the plate 12 and completely penetrating through the insulating element 1 and engaging in a bore in the wall 10.

The plate 12 is circular and has in its center a recess 14 from which the cavity in the hollow shaft 13 extends into the region of the wall 10. The recess 14 serves to receive a screw head 15 in the hollow shaft 13 for expanding the hollow shaft 13 Screw 16 arranged in the region of the wall 10. Reinforcing ribs 17 are formed between the plate 12 and the hollow shaft: 13.

The plate 12 is arranged within the insulation element 1. The area 5 between the plate 12 and the surface 4 of the insulating element 1 is filled with a plug 18. The plug 18 consists of mineral fibers bonded with binders, the plug 18 having a fiber course in its axial direction, i.e. perpendicular to its end faces. As a result, the stopper 18 is formed in the stopper direction with a high degree of rigidity and at right angles to the stopper direction with a high side compressibility, so that it can be compressed in a simple manner before insertion into the region 5. Accordingly, the plug 18 can have a slightly larger diameter than a region 5 in the case of circular regions 5, in order to be able to be installed in the region 5 by clamping.

A second embodiment of a heat and / or sound insulation system 9 is shown in FIG. 6. In contrast to the exemplary embodiment according to FIG. 5, it can be seen that the area 5 is conical towards the insulation holder 6. In addition, the insulating element 1 has a highly compressed layer 19 which is formed in one piece with the insulating element 1 and faces the layer 11 of the adhesive mortar. The additional layer 19 with increased bulk density compared to the insulating element 1 makes it possible to arrange the insulating material holder 6 deeply recessed in the insulating element 1 at a very great distance from the outer surface 4. The plug 18 which is still to be inserted is not shown in FIG. In the present exemplary embodiment according to FIG. 6, it can also be formed by a local foam which completely or partially fills the area 5 above the insulating material holder 6, in which case a plug 18 made of mineral fibers can also be inserted and glued in place. The layer 19 of increased bulk density can alternatively or additionally be arranged in the area of the outer surface 4. Such a configuration is shown in FIG. 7 as a third embodiment.

In this case, an insert 20 is additionally inserted into the area 5, which is basket-shaped and is otherwise shown in FIG. 8 and will be described below. The insert 20 has side walls 21 and a bottom region 22, in which a central bore 23 for the passage of the insulation holder 6 is arranged.

At its ends opposite the bottom region 22, the side walls 21 have a radially outwardly directed collar 24 which lies flush on the surface 4 of the insulating element 1.

The height of the side walls 21 is greater than the thickness of the layer 19 of increased bulk density. The insert 20 consists of metal, namely a sheet metal with a material thickness of 0.88 mm. Protrusions, not shown, are arranged on the side walls 21 within the insert 20 and are pressed out of the sheet metal of the side wall 21 in such a way that their free ends point to the bottom region 22. These projections serve as barbs and engage in the inserted plug 18 so that it is secured against falling out.

Finally, the insert 20 is shown in a top view in FIG. In addition to the construction elements of the base region 22, the side wall 21 and the collar 24 already described, it can be seen that the base region 22 has, in addition to the bore 23, further openings 25 which are also arranged in the region of the collar 24 and have a rapid temperature and Moisture compensation between the insulation element 1 and the cover layer, not shown, on the outer surface 4 of the insulation element 1 is used. In addition, further openings 25 are also arranged in the side wall 21, but these are not shown in FIG. 8.

Claims

Expectations

1. Heat and / or sound insulation system for the insulation of external facades (8) on buildings, in particular as part of a thermal insulation composite system, with at least one, preferably a plurality of

Insulating elements (1), which insulating element (1) is plate-shaped, has two large surfaces (4) and these connecting side surfaces (2), which are arranged essentially at right angles, and are suitable for receiving a plaster application and by means of insulating material holders (6) on the outside The outer facade (8) can be fastened, characterized in that at least one large surface (4), namely the large surface (4) facing the plaster application, has a number of incisions (3) which corresponds at least to the number of insulation holders (6) and which because it delimits a certain area (5) within the large surface (4) and has a depth that enables volumes to be separated from the insulating material.

2. Insulation system according to claim 1, characterized in that the incisions (3) on the large surface (4) in the form of a template for the arrangement of the insulation holder (6) is arranged, the template at least one of the number of necessary insulation holder (6 ) has a corresponding number of incisions (3) which are arranged at a distance from the edges.

3. Insulation system according to claim 1, characterized in that the incisions (3) have a width of 1 to 5 mm.

Insulation system according to claim 1, characterized in that the incisions (3) have a depth of 10 mm or a multiple thereof.

5. Insulation system according to claim 1, characterized in that the insulating element (1) consists of mineral fibers bonded with binders, in particular stone wool fibers.

6. Insulation system according to claim 1, characterized in that on the surface (4) with the incisions (3) an insulation layer (19) with respect to the insulation element (1) increased bulk density is arranged.

7. Insulation system according to claim 6, characterized in that the insulation layer (19) and the insulation element (1) are integrally formed.

8. Insulation system according to claim 1, characterized in that plugs (18) made of insulating material, in particular mineral fiber insulating materials, can be inserted into the incisions (3) after the volumes have been removed from the insulating material and can be fastened in a positive and / or non-positive manner.

9. Insulation system according to claim 8, characterized in that the plugs (18) consist of mineral fibers and have an axis-parallel chamfer / run.

10. Insulation system according to claim 8, characterized in that the plugs (18) are coated on the outside and / or on the bottom with an adhesive adhesive.

11. Insulation system according to claim 8, characterized in that the plugs (18) within the insulation element (1) are covered with a covering layer, for example made of a PSE rigid foam.

12. Insulation system according to claim 1, characterized in that inserts (20) can be used in the incisions (3) after separating the volumes from insulation material, which serve to receive an insulation holder ().

13. Insulation system according to claim 12, characterized in that each insert (20) is basket-shaped and at least in its side walls (21) a plurality of openings (25) and in the bottom region (22) a central bore (23) for receiving an insulation holder (6 ) having.

14. Insulation system according to claim 12, characterized in that the insert (20) consists of metal, in particular a sheet metal with a material thickness of less than 0.9 mm, or of plastic or fiber-reinforced plastic

15. Insulation system according to claim 12, characterized in that the insert (20) has a radially outwardly directed collar (24) has, which rests flush on the surface (4) of the insulating element (1).

16. Insulation system according to claim 12, characterized in that the insert (20) in the region of its inner jacket surface has projections which engage in the form of barbs in an insertable plug (18).

17. Insulation system according to claim 1, characterized in that within the volumes to be removed, in particular in the case of insulation materials of very low compressibility and / or high strength, preferably at least one opening (7) is arranged in the center for the attachment of tools.

18. Insulation system according to claim 1, characterized in that the insulation element (1) is made of mineral fibers in the area of the volumes to be removed by mechanical processing, in particular by compression and / or needling reduced in strength.

19. Insulating element for the insulation of external facades (8) on buildings, in particular as part of a composite thermal insulation system, which is plate-shaped, two large ones. Surfaces (4) and side surfaces (2) connecting them, which are arranged essentially at right angles thereto and are suitable for receiving a plaster application and can be fastened to the outer facade (8) by means of insulation holders (6), in particular for an insulation system according to one of claims 1 to 18 , characterized in that at least one large surface (4), namely the large surface (4) facing the plaster application, has at least the number of insulation layers. has a corresponding number of incisions (3), each of which delimits a certain area (5) within the large surface area (4) and has a depth which enables volumes to be separated from the insulating material.

20. Insulating element according to claim 19, characterized in that the incisions (3) on the large surface (4) in the form of a template for the arrangement of the insulation holder (6) is arranged, the template at least one of the number of insulation holders required (6) has a corresponding number of incisions (3) which are arranged at a distance from the edges.

21. Insulating element according to claim 19, characterized in that the incisions (3) have a width of 1 to 5 mm.

22. Insulating element according to claim 19, characterized in that the incisions (3) have a depth of 10mm or a multiple thereof.

23. Insulating element according to claim 19, characterized by a formation of mineral fibers bonded with binders, in particular rock wool fibers.

24. Insulating element according to claim 19, characterized in that an insulating layer on the surface (4) with the incisions (3)

(19) with increased bulk density compared to the insulation element (1) is.

25. Insulating element according to claim 24, characterized by a one-piece design with the insulating layer (19).

26. Insulating element according to claim 19, characterized in that plugs (18) made of insulating material, in particular mineral fiber insulating materials, can be inserted into the incisions (3) after the volumes have been removed from the insulating material and can be fastened in a positive and / or non-positive manner.

27. Insulating element according to claim 26, characterized in that the plugs (18) consist of mineral fibers and have an axis-parallel fiber course.

28. Insulating element according to claim 26, characterized in that the plugs (18) are coated on the outside and / or on the bottom with an adhesive adhesive.

29. Insulating element according to claim 26, characterized in that the plugs (18) are covered with a covering layer, for example made of a PSE rigid foam.

30. Insulating element according to claim 19, characterized in that within the volumes to be removed, in particular with insulating materials of very low compressibility and / or high strength speed, preferably in the middle at least one opening (7) for the attachment of tools is arranged.

31. Insulating element according to claim 19, characterized in that the strength of the bound mineral fibers is reduced by mechanical processing, in particular by compression and / or needling, in the area of the volumes to be removed.