According to the waterproof function requirements, the roof waterproof layer in a variety of different environments, different conditions to work, to withstand a variety of mechanical polyurethane waterproof exterior wpc long-life floor tile construction technology to the end, physical and chemical damage, therefore, its working conditions are very complex and harsh.

Impact of the atmosphere: roof waterproof layer is often exposed, directly by the atmosphere, freezing and thawing alternating, thermal composite french doors expansion and contraction, wet and dry changes in the impact, but also by the sun, ultraviolet light, the role of ozone, as well as wind and frost rain and snow erosion and weathering , These factors on the waterproof layer is very serious damage.

Structural deformation: the waterproof layer to the structural layer as the base, attached to the structural layer, so the structural deformation composite wood decking lumber prices will cause deformation of the waterproof layer. Such as the uneven structure of the structure, the structural deformation of the structure, thermal expansion and contraction, wet expansion and shrinkage deformation and concrete creep caused by cracks, may lead to the Wood Plastic Fence, Wood Plastic Composite Supplier - Shanghai Seven Trust corresponding location of the waterproof layer of deformation cracking, especially in the waterproof layer durability period , Waterproof material has gradually become brittle, waterproof layer is more likely to be cracked.