FI62169B - UTVAENDIGT NEDBORSTAD BYGGNADSBEKLAEDNAD - Google Patents

Description

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PATENT RECORDING APPLICATION (44) Date of first registration. - oq q7 82

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Denmark-Danmark (DK) H379 / 77 (71) Rockwool International A / S, 501 Hovedgaden, DK-26U0 Hedehusene, Denmark-Danmark (DK) (72) Helge H ^ yer, Birker ^ d, Denmark-Danmark (DK) This invention relates to externally brushed building coverings, for example for roofs and walls, which are intended to be placed on a substrate in the form of overlapping or interconnected waterproofing elements or slabs. with a landing to drain rainwater.

Hard and dense material that is waterproof and substantially airtight is usually used as such building coatings. Popular materials include metal, brick and asbestos cement.

However, these materials suffer from certain disadvantages unless internal insulation is used, which would be able to prevent high heat transfer or condensation of water vapor on the inner surface of the building pavement. In unheated storage buildings, car sheds or similar buildings whose simple wall structure provides only protection from rain, condensation of water vapor can cause significant problems and dripping condensed water can cause significant damage to goods or machinery stored in the building.

It is an object of the present invention to provide a building coating as mentioned in the introduction which does not have the above-mentioned disadvantages.

This is achieved according to the invention in that the building coating consists of a binder-containing mineral wool, the direction of the fibers of which is approximately parallel to the outer surface of this surface layer.

The invention is based on the fact that the rain is impermeable to binder-containing mineral wool, the fibers of which are almost parallel to the outer surface. The outer surface erodes to a depth of a few millimeters and the binder partially breaks, but inside, behind this surface layer, the mineral wool remains undamaged and retains its waterproof properties because the weathered surface layer protects it. However, since the mineral wool has pores due to which air and water vapor pass through it, no condensation occurs and the said disadvantages of the known building coatings are omitted. As a result, for example, roof coverings can be made completely massive, so that ventilation inside the cover and, for example, bars and beams, are not required, which means that the roof covering can be included in the insulation of the house. This feature at the same time makes the cover snow-tight, as it can be made so that the seams are tight, for example by gluing. Due to the flexibility of mineral wool, flexible joint materials are not required. In addition, since mineral wool has a poor thermal conductivity, the thermal insulation of a building is good. Because the fibers are parallel to the outer surface, the weathering spreads only slowly inside the mineral wool and the capillary effect inward in the mineral wool remains minimal. The use of mineral wool as an externally brushed building coating also offers the possibility of easy post-insulation, as the new coating can simply be placed on top of the old one.

The invention is explained in more detail below with reference to the drawing, which shows examples of the outer coating according to the invention.

Fig. 1 is a section of a part of the roof of a building covered with mineral wool boards and Fig. 3 62169 Fig. 2 shows a section of a residential building equipped with external insulation.

Figure 1 shows a section of a building that has not been insulated except for the insulation provided by the down-brushed outer cladding. The building has load-bearing columns 1 and beams 2, which support and support the wall cladding 3 and the roof cladding 4, respectively. The roof covering is assembled from overlapping, binder-containing mineral wool boards, the fibers of which on the outer surface are approximately parallel to the outer surface. The fibers may be parallel throughout the sheet, or the interior of the sheet may be made of lamellae in which the direction of the fibers is substantially at right angles to the outer surface. At the gluing point, the cover plates can be provided with a milling groove 8 so that the covering glue part becomes thinner. The upper plate can be glued to the lower one, but it can also be fastened in another way, for example by means of tips attached to the seams, which penetrate the end faces of the plates.

The wall covering can be made in the same way as the roof covering, overlapping, but it can also be made, as shown in the figure, using water nozzles made of a metal or plastic profile.

The sheets 3 usually extend to the lower surface of the roof covering, where ventilation is not required due to the vapor permeability of the mineral wool covering.

Figure 2 shows a partial section of a residential house with additional internal insulation. For example, roofing sheets 11 with a tapered profile are glued to the strips 10. In this case, the plates can overlap at point 12 and at the same time the inner surface 13 is flat. The additional insulation 14 can then be attached to the cover plate without an air gap, which, due to the air permeability of the mineral wool, impairs the combined insulation capacity of the coating and the insulation.

If the building also has an airtight or vapor-tight layer due to internal climatic conditions, it must be placed immediately on the inner surface of the insulation and, in the case of the outer insulation as the only insulation, on the inner surface of the cladding panels. The air-tight or 4 vapor-tight layer can in this case be sprayed or applied directly to the sheets.

62169

According to the invention, the tensile strength of the surface layer is preferably more than 1 kg / cm for 2 minutes, whereby heavy rain and granules cannot substantially break the surface of the coating.

The mineral wool used for the cladding sheets has a specific gravity of 3 2, preferably more than 50 kg / m and an air permeability of less than 0.62 m / h mm.

The air permeability number indicates how many cubic meters of air I can 2 penetrate through a 1 m cover plate per hour when the pressure difference is 1 mm I 2 O / m. The mineral wool may be made of mineral fibers assembled on a perforated strip at the end of a spinning chamber where they are pulverized with a curable binder. The binder may be a phenolic resin, for example a phenol-formaldehyde resin, but also a flexible phenolic resin, such as latex or acrylic-modified phenolic resins. These are more resistant to shocks and impacts, such as against granules and other stresses that may be applied to the casing. The mineral wool layer is then compressed while the binder hardens. The compression should be so strong that the specific weight of the binder-containing mineral wool exceeds 50 kg / m 2, but in most cases the specific weight is considered to be better than 100 kg / m 2. It is possible to compress the plate even harder and at the same time profile it, so that the plates can be sufficiently reinforced so that they can be placed on the supports e-here.

Mineral wool can be dyed with a suitable dye during manufacture, or the coating can be painted after installation. In connection with the manufacture, it is also possible to use a stone which produces dark, possibly black fibers. The properties of mineral wool can be improved with silicone, which reduces the weathering rate, which, depending on climatic conditions, is a fraction of a millimeter per year.