Applying waterproofing for a WC (water closet) floor is critical to prevent water leaks and damage. Here’s a step-by-step guide:
1. Surface Preparation
- Clean the Floor:
Remove dust, debris, and grease to ensure the waterproofing adheres well. - Repair Cracks or Holes:
Fill cracks or gaps with a cement-based filler or sealant. - Sanding:
Smooth out uneven areas for a uniform surface.
2. Priming the Surface
- Apply a waterproof primer to seal the floor and improve adhesion of the waterproofing material.
- Let the primer dry completely (follow the product's instructions).
3. Apply Waterproofing Membrane
- Use a liquid waterproofing membrane or sheet membrane as per your choice.
a. Liquid Waterproofing
- First Coat:
Apply the first layer of waterproofing using a brush, roller, or spray. - Corners & Edges:
Pay extra attention to corners, pipe joints, and edges. Use a reinforcing fabric or tape over these areas for added protection. - Drying:
Allow the first coat to dry for the recommended time. - Second Coat:
Apply a second coat in the opposite direction to ensure full coverage.
b. Sheet Membrane
- Cut the sheets to fit the floor area.
- Lay the sheets over a layer of adhesive or mortar.
- Overlap the seams and seal them with a roller or heat to prevent water seepage.
4. Testing
- After curing (24–48 hours for liquid membranes), do a flood test:
- Block the drain and fill the WC floor with water.
- Leave for 24 hours to check for leaks.
5. Tiling and Finishing
- Once the waterproofing layer is complete, proceed with tiling the floor.
- Use a waterproof adhesive and grout to maintain water resistance.
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