● Main Structure：10mm thick MGO board (indoor)+100mm thick Rock wool +10mm thick FC board ; Q235 , angle steel, light steel keel, round steel, steel pipe, galvanized steel coil;
● Water proof：Two polyurethane waterproof coatings，one layer of 1.2mm thick alkene rubber blended waterproof membrane;
● Surfacing：50mm thick eps roofing sandwich panel