The scope of application is waterproofing grade I to III roofing
Metal roof refers to the use of metal sheet as the roof material, the structural layer and waterproof laminated roof form. There are many types of sheet metal, such as galvanized sheet, galvanized sheet, aluminum alloy sheet, aluminum-magnesium alloy sheet, titanium alloy sheet, copper sheet, stainless steel sheet, etc. The surface of the sheet can be painted, mainly PE/PE, SMP/ PE, HDP \ PE, PVDF \ PE these four kinds of paint treatment, paint can strengthen the plate life, respectively, 5-8 years, 10-15 years, 15-20 years, 20-25 years.
The thickness is generally 0.4 to 1.5 mm, and the surface of the board is generally painted. Due to the different qualities of materials and coatings, some boards have a lifetime of more than 50 years. There are various shapes of boards, some are composite boards, and the insulation layer is composited between two metal plates, and some are single boards. When construction, some boards are assembled on site after being processed in the factory, and some are based on Roofing needs to be processed on site. Some of the insulation layers are compounded in the factory and can also be produced on site. Therefore, the form of metal sheet roofs is diverse, and it is used from large-scale public buildings to factory buildings, warehouses, and houses. Therefore, the specification stipulates that the scope of application of metal sheet roofs is that of roofs with waterproof grades I to III.