High density (700 kg/m3) chipboard core recycled and ecological , FSC certified mixed with thermosetting resin. 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 pvc free no creaking with thickness from 0.45 to 0.70 mm. Perimetral edge with plastic material no creaking with thickness from 0.45÷0.70 mm.