Add Concrete Patch To Basement Walls And Apply A Waterproofing Sealer

30 July 2015
 Categories: Construction & Contractors, Blog


Damaged concrete walls in your basement can cause the floor to become wet each time that it rains. The following steps will teach you how to patch concrete and apply a waterproofing sealer over each wall to protect your home from damage.

Use The Following Items

  • soapy water 
  • sponge
  • towel
  • wire brush
  • vacuum cleaner
  • concrete patch
  • caulking gun
  • putty knife
  • trowel
  • waterproofing sealer
  • paint roller
  • roller frame
  • vinyl tarp
  • rotating fan

Remove Damaged Concrete And Clean The Walls

Rub a wire brush over the damaged areas to remove loose pieces of concrete. If small pieces of concrete are stuck in any cracks in the walls, place the hose on a vacuum cleaner over them while the vacuum is turned on for a couple minutes to assist with removing them. Clean the walls with soapy water and a sponge. Mild detergent will effectively remove surface dirt and stains. Rinse the soapy residue that remains on the walls with water. Dry the walls off with a towel or allow them to air dry.

Fill In Cracks And Holes In The Walls

Concrete patch comes in tubes and larger containers. Add a tube of patch to a caulking gun to fill in small cracks. Insert the tip of the gun into each crack and squeeze the trigger as you move the tip of the gun across each damaged area. After the patch is added to each crack, level it out with a putty knife until it is uniform with the rest of the wall.

Use a larger container of patch to fill in holes in the wall. Add the patch to a trowel and fill in each area that is missing concrete. Smooth the patch out with a putty knife. Allow several hours for the patch to dry. The patch needs to be completely hardened before you add the waterproofing sealer in the next step. 

Apply Sealer To Each Wall

Lay a vinyl tarp next to each wall. Dip a paint roller into a bucket of waterproofing sealer until it is evenly coated. Apply the sealer to each wall, beginning in one corner of a wall. Move the roller from top to bottom as you work your way across each wall. Wait several hours for the sealer to dry. Set up a rotating fan in the basement and open the windows to speed up the drying process. If any walls are not covered evenly, apply a second coat of sealer. After the sealer has dried, the basement will be protected from water damage when it rains. For more information, check out companies like FreeFlow Environmental.


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