Water can damage a masonry wall's sturdiness, so it is important to take steps to add protection before that happens. Making a masonry wall waterproof is not difficult, and will save you countless time, frustration and expense by keeping water out in the first place.
Things You'll Need
- Wire brush
- Mauriac acid
- Rubber gloves
- Long-sleeved shirt
- Eye protection
- Fast-setting hydraulic cement
- Stiff bristle brush or roller
- Masonry waterproofing paint
Prepare the surface by removing any paint chips, loose cement and salt deposits (you can spot salt deposits because they look white and powdery). Use a wire brush to remove the salt deposits.
Clean the area with Mauriac acid. Wear rubber gloves, a long-sleeved shirt and eye protection when you apply the acid.
Use a fast-setting hydraulic cement to patch holes and cracks in the masonry.
Apply the first coat of masonry waterproofing paint to the wall and joint, using a stiff bristle brush or roller. Thoroughly work the paint into the joints.
Apply a second coat of masonry water proofing paint, then clean up the work area.
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