Surface water is the common quality problems that exist in construction, also has been unable to solve the problem very well. Currently, more use of the rigid and flexible waterproof two approaches. As the temperature response of rigid water-proof, easy to crack water seepage; flexible waterproof, mostly asphalt, linoleum and other organic materials, easy to aging, short life. In recent years, although a variety of new waterproof material one after another, but higher prices, lack of construction experience, and needs further testing, and durability reasons. Therefore, it is still mainly used cheaper materials.

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