The purpose of waterproofing is primarily to prevent渗漏 affecting downstairs neighbors when using running water in your own home. Therefore, if your roof leaks or seeps, applying waterproofing to your ceiling is ineffective; it must be done on your upstairs neighbor's floor to be effective. Residents on the first floor, although not required to waterproof, can still benefit from moisture and humidity control. Standard waterproofing procedures include: leveling the existing floor with cement mortar, then applying a 3-coat system of synthetic polyurethane waterproof coating once it dries (not damp), or using modified asphalt or glass fiber mesh for a two-oil-one-fabric treatment. The requirement is to waterproof the bathroom walls to a height of 1.2-1.5 meters, the kitchen to at least 0.5 meters, and balconies to the height of the exterior window sill. After drying, conduct a water storage closure test to ensure no leaks before proceeding with floor work. If the existing floor or walls are damaged, waterproofing treatment and closure test are mandatory.

Waterproofing and leak repair construction procedures:

1. After the preliminary cleaning, the key areas such as the阴阳 corners, expansion joints, and construction joints should be treated first. Pay special attention to parts like drainage holes that are difficult to paint, which should receive reinforced treatment with 2-3 coats of waterproof base coating.

2. Be prepared to differentiate between waterproof membranes, waterproof coatings, base coatings, and adhesive membranes. Apply the base coating. To enhance the adhesion between the waterproof membrane and the base, apply the base coating repeatedly, ensuring even coverage, full penetration into the concrete base, and improved bonding and shear strength.

3. Waterproof coating must be mixed according to the product instructions, using a ratio of A:B=2:1, with the mixing amount matching the actual usage on-site.

4. Ensure the waterproof coating is well-mixed for approximately 3-5 minutes, continuing to stir until the mixed liquid of components A and B is uniformly blended.

5. Apply the well-mixed waterproof coating to the designated area, ensuring the base coat is larger than the area of the adhesive membrane. The coating should be applied within no more than 30 minutes from the end of mixing to the completion of application.

6. After the base coating is finished, wait approximately 4-8 hours before applying the second and third coats of base coating. The thickness for each coat should be around 0.5 mm, with the second coat being approximately 0.5 mm and the third coat also around 0.5 mm. Ensure the coating is fully cured before applying the second coat.

7. Wait for the secondary coating to fully cure before bonding the sheets (The waterproof coating layer can be applied in multiple coats or sprayed based on the actual site conditions and thickness requirements of the project; please ensure to complete the application in one go).