Laminated plasterboard consisting of a 100% natural gypsum core tightly bonded to two cellulose sheets. Board consisting of a 100% natural gypsum and fibreglass core, coated on both sides with a continuous fibreglass mesh film. This special composition gives it A1 fire rating, thus providing better resistance. It is identifiable by its white front. It has a nominal thickness of 13 mm, with a nominal width of 1200 mm. The long edges of the board are cardboard-coated and tapered (BA).