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An impregnated board with increased resistance to humidity. It is designed for use in areas with higher humidity such as, e.g. bathrooms or kitchens. The relative humidity in such rooms may exceed 70%, but cannot be higher than 85% (up to 10 hours a day). Such board comes with a tapered longer edge covered with carton and a square cut shorter edge. A water-repellent substance (paraffin or silicone) is added to the board gypsum core. It is used to provide wall and ceiling claddings and to construct partition walls and covering walls, suspended ceilings and attic linings.

