How to Waterproof a Wall

Water coming in through masonry walls is not a welcome sight. Water coming into your basement can cause a mold and mildew problem and damage things stored in the basement. Repairing any cracks or holes in masonry walls and painting the walls with a water-blocking compound will help protect your basement from water damage.

Drop cloth
Hydraulic cement
Putty knife
Masonry waterproof paint
Masonry brush

Instructions

- 1
  Cover the floor with a drop cloth.
- 2
  Mix hydraulic cement according to the manufacturer's directions.
- 3
  Use a putty knife to apply the cement to any holes or cracks. Fill in the voids completely to stop water from coming through the defect in the wall.
- 4
  Allow the cement to set according to the manufacturer's directions.
- 5
  Use a masonry brush to apply a coat of masonry waterproof paint to the entire wall. Let the first coat of paint dry.
- 6
  Apply a second coat of paint to the wall and allow the paint to dry thoroughly.

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