Building Waterproof Code

1. The varieties, grades and mixing ratios of polymer modified bitumen waterproofing membranes and cementitious materials must meet the design requirements and relevant technical specifications and standards.
2. The detailed practices of the membrane waterproof layer and its deformation joints, cornices, flooding, water drop, embedded parts, etc. must meet the design requirements and the provisions of the roof engineering technical specifications.
3. Leakage is strictly prohibited in the waterproof layer of roofing coil.
4. The base layer of the membrane waterproof layer should meet the drainage requirements, be flat and clean, free from sanding, hollowing and loosening, the corners of the male and female should be arc-shaped, and the waterproof layer should be free of water.
5. The cement layer should be painted evenly, and there should be no defects such as missing brushing and pitting.
6. The paving, lap joint, and retraction of the membrane waterproof layer should meet the design requirements and the requirements of the roof engineering technical specifications, and should be firmly bonded without voids, damage, slippage, edge warping, blistering, wrinkles, etc. Quality defects. 7. Quality problems that should be paid attention to: 1. Hollowing of the waterproof layer of the coiled material: It mostly occurs between the leveling layer and the coiled material, especially the joint of the coiled material; the reason is that the base layer is not dry, the gas is not exhausted completely, and the coiled material sticks. The knot is not strong and the pressure is not solid; the acceptance of each process should be controlled. 2 Leakage of the waterproof layer: Strengthen the detailed operation. The roots, downspouts, expansion joints and coil lap joints should be closed and bonded. The joints should be protected during construction. The caulking should be cleaned and cleaned. The connecting surface is sticky to ensure the construction quality. 3 Water accumulation: the roof and eaves flooding slope is not smooth, the slope is not enough, and the roof flatness is poor; the base level leveling layer and the flooding slope should meet the requirements during construction.