Clean the walls, ceiling and floor of the basement with the surface cleaner and rags. If the paint is flaking off, use the wire brush and paints thinner to remove the flaked paint. When cleaning look for water marks and streaks on the walls. These indicate a leak. Trace them back to find the hole or crack that is letting in the water.
Check every surface for cracks, leaks and broken seals around windows. If you locate a moist area, trace the water back and look for the source.
Seal the windows. Use the caulk around the windows to make sure the seals are good. A thin layer of caulk around the glass and caulk in any holes in the window frame with keep the window from leaking.
Dry the area around cracks in the concrete. Mix a small amount of concrete patch mix in a bucket and fill the crack or hole with a trowel. Smooth out the mix and make sure the crack is covered. Allow the patch to dry. Sand down the patch once it is dry.
Locate areas of pipes that are leaking. Turn off the water to the house and dry the pipe. Tighten any loose pipes. Apply plumber's epoxy to any leaky joints or connections and replace any pipes that have holes or are rusted.
Apply the waterproofing compound to all the surfaces of the basement with a paintbrush. Try to apply an even coat. Wait for the compound to dry and apply a second coat of the compound. Start at the bottom and work your way up the walls. For the floors, start at the farthest point from the stairs and work your way toward the stairs.
Things You Will Need
- Surface cleaner
- Work gloves
- Wire brush
- Paint remover
- Concrete patch mix
- Caulk and caulking gun
- Plumber's epoxy
- Replacement pipe
- Waterproofing compound
- You should waterproof basements in damp climates every two years or as soon as moisture appears. In drier climates you should reapply the compound every four years.