Snap reasonable manner: rockwool roof fastening connection using the external walls of rock wool board offer, avoiding the hidden dangers of leaking roof seams, the amount of saving accessories. And fixed firmly reasonable: Rockwool roof using a special self-tapping screws M6 and purlins fixed fire facades rock wool board, can effectively resist typhoons and other external forces. Self-tapping screws provided on the roof peak position facades wool board factory surface, using a special waterproof external walls of rock wool board structure, waterproof to avoid weak points. Upper and lower surfaces: galvanized color steel, thickness of 0.4-0.8mm. According to the specific requirements of customers, but also can color galvanized steel or galvanized steel. After the first steel roll forming machine composite rock wool factory.