Laminated plasterboard consisting of a 100% natural gypsum core tightly bonded to two cellulose sheets. The board characteristics give it type I classification as per standard EN-520:2004 +A1 2009. This type of board is used in applications that require greater surface hardness. In addition, its high-density formulation give it greater resistance to impacts and better insulation against airborne noise. It is identifiable by its blue 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).