FIELD: construction.
SUBSTANCE: group of inventions relates to construction. Moisture-variable protective layer, used in particular for protecting heat insulating layer in insulated building structures, such as roof and/or wall structures of a building, has a water-vapour-diffusion-equivalent air layer thickness Sd that is dependent on the ambient humidity. Wherein the protective layer at least partly consists of and/or comprises material that has water-vapour-diffusion-equivalent air layer thickness Sd of greater than 10 m when there is a relative humidity of atmosphere surrounding protective layer in the range from 0 % to 25 %. And has a water-vapour-diffusion-equivalent air layer thickness Sd of less than 0.4 m when there is a relative humidity of the atmosphere surrounding the protective layer in the range from 90 % to 100 %. Value of Sd at a relative humidity of 25 % is between 20 m and 100 m. Protective layer is available from a mixture of polyurethane with polymer comprising vinyl alcohol as monomer and/or consists of such mixture and/or has such mixture.
EFFECT: improving protective layer to prevent damage to building materials moisture,
possibility of using in isolated constructions of roof and/or building wall, equally from outside and inside with respect to the room, use regardless of climatic conditions.
15 cl, 11 dwg, 5 tbl, 3 ex
