<p>Roof of other structural levels of the impact: roof insulation, leveling, protection and other levels, if handled properly or poor quality, it will directly affect the quality of the waterproof layer. Damage to external forces: waterproof layer in the construction or use of the stage are likely to be external or man-made damage, resulting in damage.</p><p> High stress state of aging damage: due to structural deformation, temperature difference and the construction of hard to pull the waterproof membrane or coated carcass, so that the waterproof layer perennial in a high stress state, greatly accelerated the aging of the waterproof layer can lead to early damage .</p><p> Tile Paste Features Fatigue damage: the structure by the external force, especially the temperature changes and vibration of the building, it is constantly changing in the movement, so the waterproof layer is also subject to telescopic changes, so that repeated fatigue.</p><p> a great damage to the waterproof layer The Chemical medium erosion: With the recent years, serious environmental pollution, waterproof layer will be acid rain and other harmful chemical media erosion and damage. Mold and biological damage: in the roof of low water consumption easily produce mold, they devour the waterproof Wood Plastic Fence, Wood Plastic Composite Supplier - Shanghai Seven Trust material and carcass fiber, damage the waterproof layer. In addition, due to the roof of the long-sleeved two-component polyurethane waterproof coating and single component distinction, weeds, and even grow shrubs, the roots through the flexible waterproof layer, resulting in roof leakage.</p>