The national Code for Construction of Residential Decoration Engineering clearly points out that the waterproof layer should extend from the ground to the wall, 300mm above the ground; The waterproof layer on the bathroom wall shall not be less than1800 mm. After the waterproof layer construction is completed, it is necessary to conduct a water closing test, block all sewers in the bathroom, build a "sill" with a height of 250mm at the door, and then inject water with a height of 200 mm.. After 24-72 hours, confirm that there is no leakage, and then paste the tiles.
2. According to different waterproof materials, the types of waterproof additional layers include cement mortar, coiled material, coating and metal. The construction specifications of waterproof additional layer of different materials are different. Here is a brief introduction to the specifications of the waterproof additional layer of coiled material.
(1) The number of layers of rubber-plastic coiled material is one layer, and the overlapping length of two layers of coiled material is100 mm. The number of layers of asphalt coiled material is determined according to the engineering situation.
(2) The lap length of two coils should be no less than 100mm for the long side and no less than 150mm for the short side. The seams of the upper and lower layers and adjacent two layers of coiled materials shall be staggered 1/3, and the upper and lower coiled materials shall not be vertically paved;
(3) Rubber and plastic coiled materials shall be evenly coated according to the requirements of adhesive use, and the coating thickness of hot asphalt between layers of asphalt coiled materials shall be1.5 ~ 2.5 mm. ..
(4) At the corner and special parts of the coil, add 1 ~ 2 layers of the same coil or coil with higher tensile strength.
(5) At the corner between the facade and the plane, the seam of the coil should stay on the plane, and the distance from the facade should not be less than 600 mm ..
(6) The pasted coil shall be smooth and compacted, and it must be closely bonded with the base surface and each layer of coil, and the lap joint must be pasted and sealed. The asphalt coiled material shall be coated with a layer of hot asphalt binder evenly on the outermost surface, with the thickness of1~1.5 mm.
3, waterproof additional layer construction
(1) base cleaning: the base surface needs to be kept dry with water content.
(2) Treatment of base course: If the base course has surface defects such as hollowing, sanding, cracks, loose slag, unevenness, water accumulation, fine sand dust, etc. , must be cleaned and repaired, qualified rear can proceed to the next working procedure.
(3) Pipe root sealing: the edge surface around the grouting hole of the pipeline is low 10 mm, which is tightly sealed with building waterproof sealant and firmly bonded.
(4) Elevation and plane elastic line: around the kitchen and bathroom, open balcony, open corridor wall and pipeline, measure the horizontal reference point with an electronic level. The reference line pops up 300 mm above the highest point on the ground, and the reference line pops up 250mm from the pipe edge of the ground wall.
(5) Brush the base treatment agent: brush the base treatment agent thinly and evenly on the base to be waterproof and pasted with a long roller, and brush the complicated parts and edges with a paint brush. It is required that the primary treatment agent is not exposed and evenly coated. Don't brush it repeatedly, and the next working procedure can only be carried out after the primary treatment agent is dried to 95%.
(6) Coating additional layer: 1.5 mm thick polyurethane super-elastic waterproofing should be dried for more than 4 hours after coating with primary treatment agent, and then coating additional layer. Firstly, roll-coating the non-woven fabric while paving the carpet, and then roll-coating the non-woven fabric evenly, so that the non-woven fabric is kept flat and firmly bonded with the base layer, so as to ensure that the non-woven fabric does not warp and ensure the flatness; The lap length of non-woven fabric shall not be less than100 mm; ; Carefully meet the baseline and the complex part on the wall with a brush to ensure that the exogenous factors are connected with the whole. When it is cured to be non-sticky, you can brush the second layer, and so on for three times.
(7) Self-inspection: The self-inspection shows that the waterproof additional layer is firmly bonded with the base, with tight joints and no defects such as damage and hollowing; The thinnest part of the coating reaches 95%, and the plane, the angle of yin and yang and the edge surface are clean and flat.
Extended data:
Waterproof coating requirements
1, clean;
2, the moisture content is not more than 9%;
3, must besmear brushs 3-5 times;
4. The thickness of the cured product brushed each time shall not be less than 65438+/-0 mm, and the next construction shall be carried out after it is completely dried;
5. After painting, make a mortar protective layer on the waterproof layer of the coating, and then paste the tiles.