High density Calcium Sulphate panel high(1500 kg/m3) thick single-ply; bottom surface made by galvanized steel sheet 0,5mm tck. that provide a barrier for the humidity, increase mechanical resistance and as equipotential reinforcement for the purpose of maintaining the floor’s electrical continuity properties. Perimetral edge with plastic material no creaking with thickness from 0.45 to 0.70 mm.