Abstract: The present invention is a decorative mould resistant gypsum wall board for use in constructing walls. The wall board is formed from a non-biodegradable gypsum wall board having opposite sides. The wall board has a water resistant gypsum core sandwiched between two glass fibre reinforced structural matts. A water vapour permeable decorative plastic sheet is bonded to one side of said gypsum wall board by a water vapour permeable adhesive layer. The water vapour permeable sheet may consist of a perforated sheet of decorative vinyl. The finished wall board is decorative, inherently mould resistant and will not act as a vapour barrier.

Abstract: An improved mould resistant gypsum wall board for use in constructing walls is disclosed. The wall board comprises a water resistant gypsum core having opposite first and second surfaces, the first and second surfaces of the gypsum core being covered by a non-biodegradable structural mat, a plastic sheet bonded to the structural mat cover of the first surface by a bonding agent, the bonding agent being made of a non-biodegradable adhesive. The structural mat is preferably made of fiberglass and the bonding agent preferably consists of an aqueous solution of a plasticizer, ethylene vinyl acetate and an acetate copolymer. The plastic sheet is preferably made of vinyl and contains an anti-biotic chemical agent selected to inhibit the growth of mould.