If you currently have cinderblock walls in your basement and want to turn your basement into a usable living space, one of the first steps you need to take is waterproofing your basement walls. Follow the steps below to easily waterproof your basement cinderblock walls.
Clean Your Cinderblock Wall
The first thing you need to do is clean your cinderblock walls. If there was previously paint applied to your cinderblock walls and it is peeling off, you'll want to scrape the paint off. You can use either a paint scraper or putty knife to remove the loose paint from your cinderblock walls.
Once you remove any loose paint, you need to get rid of any dirt that is on your cinderblock walls. To start with, sweep away the loose debris and dirt on your walls with a broom. Then, follow through by using a damp rag to remove any remaining dirt. Make sure that your wall is cleaned thoroughly before proceeding to the next step.
Patch Any Holes In Your Cinderblock Wall
Second, you need to patch all the holes and cracks in your cinderblock wall. Patching these holes will help ensure that your paint job does not crack or get damaged in the future. Patching these holes will also help with the waterproofing process and prevent water from leaking into your basement.
To patch the holes, you will need to purchase some hydraulic cement that expands. You'll want to use a putty knife to apply the expanding hydraulic cement into and directly on and around the holes and cracks. It is generally a good idea to allow these cement patches to dry completely for at least a day before proceeding to the next step.
Painting Your Cinderblock Wall
For the third step, you will actually paint your cinderblock walls. You will need paint rollers designed specifically for masonry paint, a paint tray and waterproofing masonry paint. The amount of paint you need depends on how much space you need to paint; refer to the guide on the paint cans to determine how many cans you will need.
Start at the top of your wall, in a corner, and work your way down and across the wall. Apply pressure as you paint; this will help force the paint inside of all the cracks and crevices in your cinderblock wall.
Allow the first layer of paint to dry according to the directions on the can. Expect to wait up to twelve hours between each coat of paint.
Once the paint has had adequate time to dry, apply a second coat of masonry paint. You will need to apply between two to three coats of masonry paint to your cinderblock walls in ensure that it is effectively waterproofed. You want to apply enough paint so that you can no longer see the cinderblocks.
If you feel you cannot do this on your own, consider contacting a professional waterproofing company, such as Central Penn Waterproofing, who can expertly waterproof your basement walls.