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WaterproofingWaterproof film applied in roof constructions to protect the building against moisture, rain, snow, and water. These films can be divided into two groups-simple waterproof film and waterproof film with condensate coating (antikondensatnye films). Simple waterproof film is usually reinforced plastic film, which is laid out on a non-insulated roof, well ventilated attics and sheds. Their main task is to collect dripping water and discharge it into the runoff. In turn, antikondensatnaya film used on roofs, within which more heat than outside (in insulated roofs). This film is especially recommended for metal roofs, which is a lot of condensation. Good to know! Lay a film should never be put directly to wool.When is uploaded; above and below water-insulation film to keep the ventilation gap about 5 cm wide.3. Protivovetrânnaâ isolationThe main objective of protivovetrânnoj is to provide the most optimal isolation conditions for thermal insulation material (wool) and outdoor building structures is to protect the thermal insulation material of heat loss, as well as provide drainage of moisture from the insulation material and wooden structures. Highest quality system protivovetrânnoj isolation are high capacity vapor (diffusion coefficient is desirable above 1200 g/m2), durability (preferably 50 years) and increased resistance to water (to desired height of the water column more than 1 meter). Film protivovetrânnoj insulation is placed close to the thermal insulation material (no gap), leaving corotop in 10-15 cm. Fixed film strips or straps. Over the insulating layer ventilation gap is retained.Good to know! Film protivovetrânnoj insulation should have a pair of high-bandwidth and at the same time resistance to wind pressure.Vents in the walls shall not be less than 2 cm, on the roof-not less than 5 cm.
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