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Metal Roofing Sheet

The thickness of metal roofing sheet is generally 0.4 ~ 1.5mm, and the surface of metal roof is usually painted. Because of the different quality of material and coating, the life of some boards can be more than 50 years. The shape of metal roofing sheets are varied, there is a composite plate, is insulating layer between two layers of sheet metal, also some for the single board construction, some in site in the factory after the assembly, some according to the need of roofing engineering in the field of processing. Some of the insulation layer in the factory compound can also be produced at the scene. Therefore, the metal sheet roofing form is diverse, from large public buildings to factories, warehouses, houses and so on. Therefore, the specification stipulates that the applicable scope of sheet metal roofing is waterproof grade I - III roofing.