Waterproof joint of roof parapet groove

During structural construction, a 50x60 groove is reserved on the wall as a waterproof seal, and the height of the waterproof groove is on the finished surface of the roof. During construction, grooves are reserved, steel bars are planted, and bumps are poured. The height of the waterproof bumps used as waterproof seals is 350 mm; On the finished surface of the roof. Waterproof heads can be fixed with cement nails with a spacing of 500mm.

When the waterproof material is coiled material, two layers of polyurethane should be added at the convergent part of the parapet.