Who understands bathroom waterproofing practices?

The toilet space of ordinary residential buildings is narrow, and there are pipelines passing through the floor slab, so the coating is commonly used for waterproofing and the membrane is rarely used for waterproofing.

There are 2 common types of paint waterproofing:

Synthetic polymer - polyurethane waterproof coating (polyester cloth, glass fiber cloth, etc. are required for corners, etc.).

Polymer modified asphalt - SBS waterproof coating (need to add carcass reinforcement materials, polyester cloth, glass fiber cloth, etc.).

Asphalt-based waterproofing coatings are basically gone.

Polyurethane waterproof coating is generally practiced as follows:

1. The ground is oriented to the slope of the floor drain, cement mortar or bean stone concrete, but the surface should be smooth. The slope near the door is small, and the slope near the floor drain is large, so you can grasp it according to the specific situation.

2. The pipeline passes through the root of the floor slab to strengthen the waterproofing. After the pipe root building sealing paste is sealed tightly, and the cement is smoothed and the foot pads are smoothed, the glass wire cloth reinforcement layer is 1 or 2 layers when brushing the waterproof coating. The same measures are taken near the floor drain.

3. The wall is clean and flat, without floating ash and small particles, and the small original corner or slope angle is wiped at the junction of the wall and ground. When brushing waterproof coating, paste 1 2 layers of glass wire cloth reinforcement.

4. The total thickness of the polyurethane waterproof coating film is required to be more than millimeters. It can't be decided by the number of passes. The pipe root and the corner of the reinforcing layer are brushed first, and after the surface is dried at room temperature for 4h, then a large area is brushed and scraped. There shall be no leakage and bubbling. Brush a large area for 24 hours and then apply the next layer after curing.

6. The waterproof layer on the ground should be painted 300 wide outside the door of the bathroom. The waterproof floor waterproof layer should be 200 meters higher than the ground, and the wall waterproof layer of the bathroom with shower should be 1800 meters higher than the ground (L8 recommends waterproofing the full wall).

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Plastering leveling, brushing waterproof twice after drying, tiling or directly tiling after making cushion, and completion.

The bathroom is waterproof, and the surrounding walls need to be painted at a height of not less than 30 cm; If there is a shower, the height of the waterproof paint applied on the installation of the shower faucet and the adjacent wall should not be less than 150 cm, preferably about 180 cm.

After the waterproofing is done, a closed water test should be done. It is to put the water on the floor of the bathroom, so that the ground is completely submerged in water about 3 4 cm, and set a fixed elevation (horizontal plane); After 24 hours, if the water level is below the set elevation, it means that there is a water seepage problem on the ground, that is, the waterproofing is not done well. In this way, it is necessary to re-do the waterproofing.

If it's convenient, you can also go downstairs to the bathroom to check for water imprints.

Waterproofing should be carried out before paving floor tiles and wall tiles, and waterproofing cannot be done after paving.