In the building construction, building waterproof technology plays a role of function guarantee. The wall bath, wall and ground engineering parts of the building roof, basement, kitchen and toilet can guarantee no leakage from all kinds of water intrusion, the use function of the house, the directly related quality of life and living environment, and complete the building waterproof project. In addition to the selection of waterproof materials and reliable quality, there must be a careful design and construction.