Aluminium alloy coated steel sheet roofing and zinc coating thickness, and no less than 0.635 mm installed a hidden screw with the CERAMIC insulation COATING thickness 3 mm external spray.
Alloy coated steel roof Aluminum and zinc The total thickness of the coating layer not less than 0.635 mm. Install insulation hidden screw with a thickness of 3 mm CERAMIC COATING. Spray the outside.
Roof sheet steel alloy coating, aluminum and zinc coating layer and the overall thickness not less than 0.635 mm installed hidden screw with insulation. CERAMIC COATING 3 mm thick spray exterior.