Reason one, because of the reason of craft and property, the plasticity of PVC plastic far surpasses the material such as steel plate, iron, and very easy to be cut, almost all environment and space, plastic can be molded into any shape according to the requirement, adaptability is far better than the steel and so on. Because of its characteristics of high plasticity, it can meet the requirements of the customers all, for example, PVC tile can according to requirements, both in making thickness, shape, color can be easily made, it is hard to do in the steel roof tiles, steel dyeing cost is huge and great damage to environmental protection, and in this PVC tile but take advantage. Reason two, on the routine maintenance, the maintenance of steel architecture than in PVC materials cost almost four times or more, because the steel tiles exposed to air, inevitably suffer from various corrosion, water, acid, temperature and so on, but the PVC tile does not exist this kind of question, PVC absolutely waterproof and resistant to acid can remove a lot of maintenance costs, and in terms of thermal insulation, PVC is more effective than steel. Reason 3, PVC is one of the biggest characteristics itself belongs to the height of lightweight materials, compared with other materials to light, for there is no doubt that can reduce the bearing requirements of the building, and because the fuel increasingly rise, all kinds of raw materials transportation cost "high tide", as the oil into the cost of cannot be ignored, and the transport of portable PVC material, is far than transport has a very large weight of building materials such as steel to convenient and cheap, this is the advantage that cannot be ignored.