Building Waterproof Knowledge

The interface connected with waterproof material must not have puffy drum, sand, honeycomb, wood, paper scraps, sludge, small stones, also can not be done on the loose and not strong table body. The reason is poor adhesion, coupled with the sun's ultraviolet damage, the building object itself thermal expansion and contraction, as well as water vapor pressure damage, easy to cause waterproof layer aging, failure.