Roof sheet, also known as profiled steel rood tile, is a profiled plate made of color steel sheet or galvanized steel sheet or galvalume steel sheet, which is rolled and cold bent into various wave shapes. It is mainly applicable to the roof, wall and internal and external wall decoration of industrial and civil buildings, warehouses, special buildings and long-span steel structure houses. It has the characteristics of light weight, high strength, rich color, convenient and fast construction, earthquake resistance, fire prevention, rain proof, long service life and maintenance free.