Laminated plasterboard consisting of a 100% natural gypsum core tightly bonded to two cellulose sheets. The board characteristics give it type A classification as per standard EN-520:2004 +A1 2009, i.e. it is a laminated plasterboard on which skim plastering using a suitable gypsum plaster or ornamental finish can be applied to its surfaces. It is identifiable by its light grey front. On its back is a special high-strength sheet for diffusing vapour. 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).