EP1408168A1 - Thermal insulation compound system and building fitted with same - Google Patents

Abstract

Heat-insulating composite system for the lowermost, maximum 12 m, especially maximum 8 m high section of building facades, especially for buildings having a render height of up to 12 m, comprises a sub base (1a) having a separation strength of at least 30 kPa, especially at least 80 kPa, and a plug load of at least 0.20 kN/plug (load class of plug load-bearing capacity 0.20 kN), and insulating plates (4) made of bound laminar mineral wool having a thickness of 40 mm or more and a tensile strength perpendicular to the plate plane of at least 2 kPa, especially at least 3.5 kPa. The insulating plates are stuck with at least 40% of their surface on the sub base of the building facade as render supporting plates for fabric-reinforced exterior render (5) and are fixed on the sub base using plugs (11a) having an effective plate diameter of at least 90 mm and plug plates (11, 15) arranged under the exterior render and the reinforcing fabric (9). A maximum of 3, especially 2 p lugs per m2 of insulating surface are provided in the facade area. Independent claims are also included for an alternative heat-insulating composite system, and for buildings equipped with the heat-insulating composite systems. Preferred Features: The insulating plates have a plate size of 0.3-0.7, preferably 0.4-0.6, especially 0.5 m2.

Description

The invention relates to a thermal insulation composite system and a herewith equipped building.

Include thermal insulation composite systems of the type in question here Insulation boards made of bound mineral wool, which are flat next to each other on the facade are arranged. Dowels screwed into the ground reach through the Insulation boards with large dowel plates and thus secure the position of the insulation boards on the facade. On the outside of the insulation boards and the dowel plate is a Armored external plaster is usually installed in such a way that a Reinforcing layer is embedded, which is finished with a finishing coat to the outside is.

The thermal insulation composite system is stress due to its own weight hygrothermal effects and especially exposed to wind suction. Against The dowels are subject to loads due to their own weight. Console load-bearing effect too, however, shear forces are mainly due to the dead weight thanks to a coating with adhesive mortar on the back of the insulation boards which the rough outer surface of the subsurface with the rough back surface of the insulation boards in a force-locking manner, either by friction or by Adhesive bond, connects.

As a result of the hygrothermal effects (shrinkage of the plaster and Fluctuations in temperature and humidity) Cleaning system and shifts in the outer skin in the facade edge areas. With the shifts in the plane of the disc are associated with shear forces which correspond to the Superimpose forces from own loads. With regard to the usability of the Systems is only relevant to the extent that the constraint stresses cause cracks can, and with regard to stability can only be excluded that the hygrothermally caused shifts to detachment or to shear off the Lead systems in facade edge and facade corner areas.

The greatest mechanical load on the thermal insulation composite system takes place in general by the wind suction forces. These lead perpendicular to the underground over the Cross section of the thermal insulation composite system acting tensile forces in the Thermal insulation composite system, which is taken up by the dowels and in the Underground are derived. The one to absorb the shear stresses through the Adhesive mortar provided for the weight remains unconsidered; in Tear-off tests for the experimental determination of the required number of dowels no adhesive mortar used at all.

The higher the section of the building facade under consideration is, the stronger the wind suction forces are. Accordingly, the number of dowels per m ^{2 of} insulation area required taking into account the required safety surcharges increases. Even in the lowest section of the building up to a height of 8 m, four to six dowels per m ² in the area of the building surface (i.e. at a distance from the edges of the facade) have proven to be necessary.

It has been known since the late 1980s. Slat panels to form a thermal insulation composite system exclusively through Adhesive mortar and without fixing all dowels to the substrate; even in sections the building facade with a height of 80 m and more. Such large format Lamellar plates are made by a relatively thick laminar Mineral fiber fleece strips are cut and these are turned through 90 ° in such a way that the main orientation of the fibers is now in the direction of the thickness of the lamella plate lies.

Due to the predominant fiber orientation in the direction of the thickness of the Lamellar plate results in a lower thermal resistance than in laminar fiber orientation, but excellent tensile strength in the direction the plate thickness, i.e. a high intrinsic strength of the lamella plate against tearing under tensile load perpendicular to the large surface of the plate. This inherent strength of the Insulation board against tearing is subsequently called the transverse tensile strength of the insulation board designated. In the case of a lamella plate, this is in the range above 80 kPa. So that the adhesive connection between the insulation board and adhesive mortar on a Tear-off strength of 80 kPa can be tested as a start-tearing strength, which is after Consideration of all safety discounts to a minimum tear resistance after Aging of about 30 kPa. The result is the adhesive bond by means of the Adhesive mortar between a lamellar plate and a substrate the "weakest Link "against tearing off, since the forces are transferred to the wall have to. In any case, 30 kPa after aging is still sufficient to achieve the Insulation panels of the thermal insulation composite system also in Height sections of the building facade of up to 100 m without the use of dowels secure against falling.

The installation of dowels on the facade is very labor intensive. In particular the boreholes in the subsurface have to be marked out and made, which is is complex. To prevent the processor from placing the anchor plate on the reinforcement of the still damp plaster of the exterior plaster and then the top plaster Must attach above the dowel plates, are here with thermal insulation systems considered the dowel plates on the dry surface of the insulation boards positioned before any external plaster layers are applied, and lie therefore under the reinforcement layer, which therefore does not apply to the dowels Can contribute to strength against tearing. This waiver of a contribution from Reinforcement layer for dowel pull-out strength leads to a corresponding one Increasing the number of dowels and thus the need for a higher number of Dowel holes, which increases the cost.

It is therefore generally desirable, as in the case of slat slabs under 100 m work completely without dowels, or at least with a reduced number of dowels to be able to.

Insulation boards for thermal insulation composite systems, if not as Lamellar plates are manufactured as laminar or as compressed plates. In the case of laminar plates, the orientation of the fibers is reduced when they are placed the defibrillation unit essentially maintained so that the Main fiber orientation is parallel to the large areas of the plates. Such laminar Sheets have a low transverse tensile strength of, for example, 3.5 kPa or even less, but have a high thermal resistance in the transverse direction Extend the plate so that the thermal conductivity group 035 can be reached with them can. Such laminar plates are often used as two-layer plates one-sided or two-sided resistant hard rubber layers. Compressed panels are made from laminar panels when the mineral wool is in front of the Hardening is compressed in such a way that the fibers lie out of it "Set up" main direction. This will result in a higher transverse tensile strength of For example, 15 kPa is reached, albeit much lower than with lamella plates, however, a lower thermal resistance in the transverse direction of the plate than in laminar plates, so that with such plates at most the thermal conductivity group 040 can be achieved.

In these cases, due to the relatively low transverse tensile strength Insulation board the "weakest link" in the resistance to wind suction forces, because the Strength of the connection of the adhesive mortar with at least 30 kPa even after Aging is significantly higher than the transverse tensile strength of the insulation boards. Therefore the self-adhesive fastening of these insulation boards would be the thermal insulation composite system under the wind suction forces by lifting off the outside areas of the Give in insulation panels from their captured internal areas.

According to the invention - with observance of certain parameters, as specified in the claims - anchors are used to a certain extent as an aid for improving the transverse tensile strength of the insulation boards, and not as an autonomous holding means for the entire thermal insulation composite system on the substrate. For this reason, a reduced number of dowels can be used, namely a maximum of three dowels per m ² and in particular only a maximum of two dowels per m ² with correspondingly favorable load and / or strength conditions. This reduced number of dowels would not be able to support the thermal insulation composite system according to the invention without taking into account the holding effect of the adhesive mortar against wind suction forces; it would rather lead to the dowel plates being pulled through the material of the insulation boards, so that the insulation boards would fall down with the external plaster. In their function as an aid to improve the overall transverse tensile strength of the insulation boards, on the other hand, there is a basic strength against wind suction through the adhesive connection of the adhesive mortar, and a safeguard against piling or lifting of the upper layers of the insulation boards under the wind suction forces due to the reduced number of dowels. At the position of the dowel plate there is of course an immediate safeguarding of the material of the insulation boards against wind suction forces, however in the area between the dowels the dowels contribute to an improvement of the overall transverse tensile strength by bracing the surface areas of the insulation boards by means of tensile forces on the surface of the dowels. This is a similar effect to holding down a surface with a quilt on several quilt buttons compared to a homogeneous feather bed, which would be exposed to considerably larger surface deformations under suction.

Further details, features and advantages of the invention result from the following description of an embodiment with reference to the drawing.

Fig. 1 einen Vertikalschnitt durch ein beispielhaftes Wärmedämm-Verbundsystem der Erfindung und

Fig. 2 eine beispielhafte Dübelanordnung bei einem erfindungsgemäßen Wärmedämm-Verbundsystem.

It shows

Fig. 1 is a vertical section through an exemplary thermal insulation composite system of the invention and

Fig. 2 shows an exemplary dowel arrangement in a thermal insulation composite system according to the invention.

In Fig. 1 with 1a is the load-bearing surface, that is, the wall building material 1 Building wall and with 2 an old plaster attached to it or one if necessary to be applied leveling plaster, which is explained in more detail below.

3 denotes adhesive mortar which has a layer thickness of at least about 3 mm over the entire surface or in edge bead point bonding (application of an edge Bead along the circumference of the insulation board to be glued with a central one Point application) with at least 40% area. The Adhesive mortar layer 3 can be made up to 20 mm thick, using adhesive mortar are used for general purposes are approved by the building authorities.

The substrate 1a (including plaster layer 2) is "suitable for gluing", as is shown below is explained in more detail. Furthermore, it has a consistency that is permissible The load capacity of fasteners (dowels) is at least 0.20 kN / dowel.

With 4 a cut-out insulation board is designated, it is understands that a large number of such insulation panels side by side the entire Facade surface covers, as illustrated in FIG. 2.

The insulation panels 4 are either laminar or compressed mineral wool insulation panels.

Laminar mineral fiber insulation boards are generally 40 mm to 200 mm thick, "non-combustible (building material class DIN 4102-A1) boards according to DIN 18165-1 of type WV and thermal conductivity group 035. The bulk density is between 70 and 150 kg / m ³ , preferably between 100 and 140 kg / m ³ , in the example in particular at 120 kg / m ³ ± 15%. The tensile strength perpendicular to the plate level (transverse tensile strength) according to DIN EN 1607 is 3.5 kPa. The side dimensions in the example may be 800 mm x 625 mm. The panels consist of a compact top layer and a bottom layer. The cover layer is marked and attached so that the compressed cover layer is on the outside.

An example of such a laminar mineral wool insulation board 4 is about that Product "Sillatherm WVP 1-035" by the applicant, as in the general Building approval Z-33.40-142 from May 29, 2000 of the German Institute for Construction technology is explained in detail.

In the case of a compressed insulation board 4, its bulk density is in the range from 80 to 160 kg / m ³ , in particular from 110 to 150 kg / m ³ , and can have a nominal value of 130 kg / m ³ ± 15%, for example. These are "non-combustible (building material class DIN 4102-A1) panels" according to DIN 18165-1 of type WD (strength class HD) and thermal conductivity group 040. The tensile strength perpendicular to the panel plane (transverse tensile strength) according to DIN EN 1607 is 14 kPa. These compressed mineral wool insulation boards are preferably used in side dimensions of 800 mm x 625 mm and with thicknesses of 40 to 140 mm. The practical upper limit of the insulation material thickness of 200 mm can be produced by using such compressed mineral wool insulation boards with a smaller thickness of 140 mm by "doubling", ie the bonding of two layers of the insulation material with staggered joints. An example of such a compressed mineral wool insulation board 4 is the product "Sillatherm WVP 1-040" from the applicant, as explained in detail in the general building approval Z-33.40-142 from May 29, 2000 of the German Institute for Building Technology.

On the outside of the insulation panels 4 is a total of 5 Exterior plaster provided. In the example, the exterior plaster consists of a plaster 6 and a top coat 7. The bottom coat 6 is with a layer thickness between about 3 and 8 mm or more in a first layer 8 with central reinforcement mesh 9 and one second layer 10 applied wet-on-wet. In practice, those plasters can be used are used for mineral fiber insulation materials and the corresponding Fastening type are generally approved by the building authorities (approval of System manufacturers).

In particular, thin-layer finishing plasters are used as finishing plaster 7, which are grown and structured in grain size. The finishing plasters can be used Use come for the mineral fiber insulation materials and the corresponding Fastening type are generally approved by the building authorities (approval of System manufacturers).

Finally, when using structural plasters, there is generally a Coating with a system-related leveling paint. Before ordering the An associated "adhesion promoter" can be applied to the finishing coat.

The system described so far from subsurface 1a, adhesive mortar layer 3, Insulation boards 4 and exterior plaster 5 could, at least for the lowest section of the building, absorb the occurring forces, especially the wind suction forces, if between and within all layers or plies of the system a tensile strength of would be at least 30 kPa after aging. The underground is 1a procure, choose or train that the underground 1a for a permanent Tensile load of 30 kPa or more is suitable, preferably including all possible safety surcharges a tear-off strength of 80 kPa should be achieved, in order to meet all building requirements for a suitable substrate 1a sure to meet.

For this purpose, the surface of the wall building material 1 must be flat, dry, greasy and be dust free. For masonry substrates according to DIN 1053 without plaster or concrete According to DIN 1045 without plaster, the tear-off strength can generally be achieved without further Evidence is required. The test of the tear-off strength must - if required - according to DIN 18555-6.

The permanent compatibility of any existing coatings with the Adhesive mortar 3 must be checked professionally. Unevenness ≤ 1 cm / m may be bridged become; larger bumps must be leveled mechanically or by a plaster 2 be balanced according to DIN 18550-2. The plaster must have a tear-off strength after Hardening can be checked. Strongly absorbent or sanding substrates 1a must be solidified with a primer.

Between the adhesive mortar layer 3 and the mineral fiber insulation panels 4 is at suitable choice of adhesive mortar 3 a tear strength of more than 30 kPa and in particular to easily achieve more than 80 kPa. This is from corresponding Adhesive connections with so-called lamella panels known as insulation panels 4 and verifiable. Here a significant part of the mineral wool fibers is perpendicular to Large area of the insulation board 4, that is, horizontally in the illustration according to FIG Adhesive mortar 3 into it. This is a relatively unfavorable connection case, since one with the end of the fiber in an adhesive layer only by adhesive forces is held, and no positive locking forces support the connection. At a Section of the fiber in sections parallel to the extension of the large area or On the other hand, the adhesive layer can encompass the edge fibers and so alongside the adhesive effect also uses a hold-up or claw effect bring. If thus insulation panels 4 in the form of slat panels Provide tear-off strength of over 80 kPa on adhesive mortar 3, this is the case with laminar ones or compressed insulation panels 4, especially the case: with laminar insulation panels the majority of the surface fibers parallel to the large areas, and also at compressed insulation boards 4, this fiber orientation prevails in the edge areas. Therefore, the tear resistance between adhesive mortar 3 and insulation board 4 in the case laminar and compressed mineral wool insulation boards are given without any doubts.

The same considerations apply to the connection between the Outside of the insulation panels 4 and the first layer 8 of the interior plaster in the example 6th

A crucial problem, however, is that although insulation boards 4 in Form of lamellar plates predominantly in the illustration according to FIG. 1 horizontal fiber course relatively straight from the adhesive layer 3 towards the Have exterior plaster 5 and therefore a tensile strength perpendicular to the plate plane, here referred to as transverse tensile strength, which is above 80 kPa; laminar or compressed insulation panels 4, on the other hand, have a significantly higher one Thermal resistance - a transverse tensile strength that is significantly below 30 kPa is, in the case of a laminar insulation board 4 only in the range of 3.5 kPA or less more. This has the consequence that an adhesive fastening as in the case of insulation boards 4th in the form of lamellar plates is not possible because under the influence of the forces, in particular the wind suction forces, the insulation board 4 fails in its cohesion and is torn apart, an inner region of the insulation board 4 on the adhesive mortar 3 remains held while the outer area of the insulation board 4 with the external plaster 5 drops.

According to the invention, dowels 11a are therefore used as additional fastening means provided that a dowel plate 11, a dowel shaft 12 and a dowel screw 13th exhibit. The dowel screw 13 is used to pre-drill the dowel 11a Bore 14 held in the underground 1a.

Such dowels 11a are commercially available and have a diameter of Dowel plates 11 of usually 60 mm or a little more. The dowel plate 11 presses therefore flat on the adjacent surface areas of the insulation board 4.

In order to achieve an even larger area in a simple manner, the Dowels 11a can be provided with an additional insulating plate 15, like this is self-explanatory from Fig. 1 can be seen. This has a diameter of usually 90 mm or more, for example 110 mm or 140 mm, and thus still offers one larger holding surface than the dowel plate 11 alone.

Such dowels 11a are used in practice in sufficient numbers to hold the entire thermal insulation composite system mechanically. A minimum of four dowels / m ^{2 is} required for this, since the wind suction forces have to be absorbed 100% via the dowel plates.

This would reduce the number of dowels per unit area conceivable that the dowel plates 11 are placed outside the reinforcing fabric 9, so that the reinforcement mesh transmits 9 tensile forces between adjacent dowels can and thus stabilizes the thermal insulation composite system. However, this requires a Put the dowels in the wet plaster, which is labor intensive and uncomfortable and therefore is rarely accepted by processors.

According to the invention, however, the number of dowels is also reduced in that the dowels are not used as independent holding means against the wind suction forces are considered, but rather only as additional tools, in addition to Attachment to the adhesive mortar layer 3, to improve the transverse tensile strength or the tear behavior of the insulation panels 4. The dowels 11a are used in the system of the present invention to a certain extent, a tearing or shingling of the laminar or compressed insulation panels 4 under the influence of wind suction suppress. It has been shown that, depending on the specific transverse tensile strength of the insulation boards 4 used, a reduced and possibly significantly reduced Number of dowels is required compared to the number of dowels used for Support of the thermal insulation composite system against wind suction forces are required. As far as the insulation board 4 a transverse tensile strength of at least 2 kPa, in particular of at least 3.5 kPa, there is already a smaller number of dowels per Square meters as four are sufficient to ensure the stability of the thermal insulation composite system in the lower section of buildings against the wind suction forces, additional to ensure the holding effect of the adhesive mortar 3.

A reduced number of dowels 11a means a reduced number of prefabricated dowel holes 14 and thus a considerable acceleration of the Work progress in the assembly of the thermal insulation composite system. Since the Assembly costs and the time required for construction are the critical parameters assembly-related savings in a double-digit percentage range significant progress in productivity.

To produce the thermal insulation composite system according to the invention the insulation panels 4 made of mineral wool according to the bead point method or at very flat surfaces are fully glued to the surface 1a (at least 40% of the Surface is glued). The adhesive mortar 3 is in the form of "beads" and "chunks" or - if an even surface such as Precast concrete elements are present - fully applied to the insulation panels 4. The adhesive mortar 3 is said to be in use of mineral wool insulation materials worked into their surface (thin Press filler) and then applied. This requires two operations namely the wetting of the insulating material and the application of the adhesive mortar 3. The so plate 4 coated with adhesive mortar 3 is set up as described below. to To avoid thermal bridges, the insulation panels 4 must be butt joint-tight. The Joints do not need to be mortared. Unintentionally on the face of the Insulation boards 4 mortar reached is removed. The plates 4 are then on the wall pressed, moved several times back and forth ("floated in") and pressed all over against the surface 1a. This can be done by pressing several times with the palm of your hand or with the help of a suitable tool (e.g. float, Cartesia, etc.) happen.

In the past few years there has been a trend in thermal insulation composite systems the mechanical processing of adhesive and plastering mortar is increasingly being implemented. This is also in the thermal insulation composite system with mineral wool insulation boards possible. For this purpose, the mineral wool insulation panels 4 can be factory-fitted with a Adhesive bridge to be coated. The adhesive mortar 3 can on the one hand by means of a "Fuel nozzle" on the pump hose of the mortar pump applied to the insulation board 4 with a mortar bead on the edge of the insulation board and the mortar is applied in strips to the insulation board surface. With this working technique 40% gluing - with glued plate edges - can be created. To the others, the insulation panels 4 can be glued in such a way that the mortar the wall is sprayed and the panels are placed in this mortar bed. The mortar can be sprayed onto the wall in strips. The insulation boards are then start immediately, swim in and press on. These will be useful Mortar strips sprayed vertically, so that the individual horizontally laid panels on many mortar strips are applied. The bead of glue should have a thickness in the middle of at least 1 cm and not less than 5 cm wide. The wheelbase the beads should be selected so that the proportion of adhesive surface described above is reached becomes.

To ensure an adequate adhesive bond between insulation boards 4 and Ensuring pre-sprayed adhesive mortar 3 is a quick work sequence appropriate. A skin formation of the adhesive mortar which affects the adhesive bond shouldn't have started yet. There is excess adhesive mortar on construction joints remove.

According to the state of experimental investigations, the insulation boards should generally to be glued to at least 60% of the surface, but nowhere less than 50%. This requirement is intended to ensure that the adhesive beads on insulation boards are not placed too far from the plate edges.

It is also possible to "double" the insulation layer: The insulation layer is laid in two layers. If not with an adhesive bridge coated mineral wool insulation materials, the adhesive mortar must be in the surface of the first insulation layer and the second insulation layer.

The surface of the first layer of insulation board should be flat already meet the requirements of DIN 18202 for "flat" walls.

Immediately after the insulation material has been glued or only after sufficient If the insulation bond is hardened, the dowels 11a are installed.

The flush-mounted can be applied in a position in which the Reinforcement mesh is then "ironed" with a straightener. Alternatively, will if necessary, a second thin layer of the concealed plaster is applied (wet-on-wet).

After sufficient time of the flush-mounted (according to the manufacturer's guidelines) applied a primer (adhesion promoter) and again after it has dried out the top plaster is applied and immediately structured (rubbed).

Finally, when using thin-layer finishing plasters system-related leveling coat can be applied.

On the installation of accessories such as joint sealing tapes, base rails, Joint profiles, fabric corner angles etc. are not discussed in more detail here.

When using compressed mineral wool insulation panels 4 can Building authority-approved dowels 11a with a plate diameter of at least 60 mm come into use. These dowels are placed under the reinforcement mesh 9.

If laminar mineral wool insulation panels 4 are used, it can Building authorities approved dowels 11a with an effective plate diameter of at least 90 mm, preferably 110 or 140 mm can be selected. This diameter are usually by insulation holder 15 in the manner shown in Fig. 1 reached. These dowels 11a are also placed under the reinforcement mesh 9.

The above information regarding standards, building regulations, Safety surcharges etc. apply in the present form for the area of Federal Republic of Germany. Other regulations apply in other states, however regulate an analogous situation and accordingly in these countries should be used.

2 shows an exemplary arrangement of the dowels 11a on the wall of a Detached house up to 8 m building height illustrated.

A basic distinction must be made between facade edge areas 16 and these enclosed facade surface areas 17. In the facade edge areas 16 In the case of wind loads, there are increased requirements due to discontinuities in the Wind flow, vortex shedding etc. There is a much greater density here Dowels 11a are required as in those defined by the edge areas 16 Surface areas 17 of the facade or the thermal insulation composite system. This Facade surface areas 17, with which the present invention is concerned, however make up the largest part of the facade area.

In the example according to FIG. 2, insulation panels 4 with dimensions 800 mm x 625 mm used. Two insulation panels 4 thus cover one square meter of Facade surface. In the context of the invention, therefore, two insulation panels 4 require two Dowels, so one dowel per insulation board is required.

In the application shown in FIG. 2, the dowels 11a, as can be seen, placed in the surface areas 17 on the vertical joints of the insulation panels 4, such that that each dowel the edge of two insulation boards 4, half each, with its plate 11 or the insulation plate 15 engages and holds. This gives a relative homogeneous holding effect. The fact that the insulation panels 4 also with a Adhesive mortar layer 3 are connected to the substrate 1a by adhesive bonding the dowels 11a in the surface areas 17 are only required to complement the Support transverse tensile strength or the tear resistance of the insulation panels 4. This has proven to be with a significantly reduced number of dowels 11a proved in the case that the dowels 11a to fully accommodate the Wind suction forces are provided. In this case there are at least four dowels per Square meters, that is, in the example of FIG. 2, two dowels per insulation board 4 required, in the case of the invention, however, only two dowels per Square meters or one dowel per insulation board 4, which is at least a smooth one Halving the required amount of dowels in the surface areas 17 means. This Halving the amount of dowels leads to a corresponding halving of the Assembly effort for making appropriate mounting holes 14 in Base 1a for the dowels.

Claims (8)

Composite thermal insulation system for the lowest, maximum 12 m, in particular maximum 8 m high section of building facades, in particular for buildings with a plaster height of up to 12 m,
with a substrate (1a) which has a tear-off strength of at least 30 kPa, in particular at least 80 kPa and which permits an anchor load of at least 0.20 kN / anchor (load class of anchor load capacity ≥ 0.20 kN),
which has insulation boards (4) made of bonded laminar mineral wool with a thickness of 40 mm or more and with a tensile strength perpendicular to the board plane (transverse tensile strength) of at least 2 kPa, in particular of at least 3.5 kPa, which serve as plaster base boards for fabric-reinforced external plaster (5) glued to the subsurface (1a) of the building facade with at least 40% of its area and to the subsurface (1a) with dowels (11a) with an effective plate diameter of at least 90 mm with dowel plates arranged under the external plaster (5) and the reinforcement mesh (9) 11, 15) are attached, and
in which a maximum of 3, in particular a maximum of 2 dowels per m ^{2 of} insulation area are provided in the facade area (17). Composite thermal insulation system for the lowest, maximum 12 m, in particular maximum 8 m high section of building facades, in particular for buildings with a plaster height of up to 12 m,
with a substrate (1a) which has a tear-off strength of at least 30 kPa, in particular at least 80 kPa and which permits an anchor load of at least 0.20 kN / anchor (load class of anchor load capacity ≥ 0.20 kN),
which has insulation boards (4) made of bound compressed mineral wool with a thickness of 40 mm or more and with a tensile strength perpendicular to the board plane (transverse tensile strength) of at least 2 kPa, in particular of at least 3.5 kPa, which serve as plaster base boards for fabric-reinforced external plaster (5) glued to the subsurface (1a) of the building facade with at least 40% of its area and to the subsurface (1a) with dowels (11a) with an effective plate diameter of at least 60 mm with dowel plates arranged under the exterior plaster (5) and the reinforcement mesh (9) 11, 15) are attached, and
in which a maximum of 3, in particular a maximum of 2 dowels per m ^{2 of} insulation area are provided in the facade area (17). A composite thermal insulation system according to claim 1 or 2, in which the insulation boards (4) have a board size of 0.3 to 0.7 m ² , preferably 0.4 to 0.6 m ² , in particular 0.5 m ² . Thermal insulation composite system according to one of claims 1 to 3, wherein the Dowels (11a) are arranged on the joints between the insulation boards (4). Buildings with a plaster height of up to 12 m or with a section of the building facade up to 12 m, in particular up to 8 m high, with a thermal insulation composite system,
with a substrate (1a) which has a tear-off strength of at least 30 kPa, in particular at least 80 kPa and which permits an anchor load of at least 0.20 kN / anchor (load class of anchor load capacity ≥ 0.20 kN),
which has insulation boards (4) made of bonded laminar mineral wool with a thickness of 40 mm or more and with a tensile strength perpendicular to the board plane (transverse tensile strength) of at least 2 kPa, in particular of at least 3.5 kPa, which serve as plaster base boards for fabric-reinforced external plaster (5) glued to the subsurface (1a) of the building facade with at least 40% of its area and to the subsurface (1a) with dowels (11a) with an effective plate diameter of at least 90 mm with dowel plates arranged under the external plaster (5) and the reinforcement mesh (9) 11, 15) are attached, and
in which a maximum of 3, in particular a maximum of 2 dowels per m ^{2 of} insulation area are provided in the facade area (17). Buildings with a plaster height of up to 12 m or with a section of the building facade up to 12 m, in particular up to 8 m high, with a thermal insulation composite system,
which has a tear-off strength of at least 30 kPa, in particular at least 80 kPa and which permits an anchor load of at least 0.20 kN / anchor (load class of anchor load capacity ≥ 0.20 kN),
which has insulation boards (4) made of bound compressed mineral wool with a thickness of 40 mm or more and with a tensile strength perpendicular to the board plane (transverse tensile strength) of at least 2 kPa, in particular of at least 3.5 kPa, which serve as plaster base boards for fabric-reinforced external plaster (5) glued to the subsurface (1a) of the building facade with at least 40% of its area and to the subsurface (1a) with dowels (11a) with an effective plate diameter of at least 60 mm with dowel plates arranged under the exterior plaster (5) and the reinforcement mesh (9) 11, 15) are attached, and
in which a maximum of 3, in particular 2 dowels per m ^{2 of} insulation area are provided in the facade area (17). Building according to Claim 5 or 6, in which the insulation boards (4) have a board size of 0.3 to 0.7 m ² , preferably 0.4 to 0.6 m ² , in particular 0.5 m ² . Thermal insulation composite system according to one of claims 5 to 7, wherein the Dowels (11a) are arranged on the joints between the insulation boards (4).

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