Wet basement walls are a source of concern. Constant moisture is a breeding ground for mold, mildew, and bacteria. Basement walls are either constructed out of poured concrete or concrete blocks, which are porous. Over time the pores allow water to seep back through the walls. This can occur for any number of reasons, such as house-settling, clay soil that retains water, foundation cracks, and flooding. The best solution is to repair the source of the problem, but some repairs can cost thousands of dollars. For do-it-yourselfers, sealers provide a barrier and will stop moisture from seeping through the walls.
Things You'll Need
- Variable-speed drill
- Mixer bit
- 5-gallon bucket
- 4-inch natural bristle paintbrush
- 9-inch lamb's wool roller
- 5-gallon bucket roller screen
- Non-porous epoxy sealer
Wipe down the walls with old rags or towels. Set fans around the basement and allow them to run enough so that the walls are as dry as possible. This will provide a better bonding surface for the epoxy sealer.
Mix a solution of one part base to one part epoxy resin in the 5-gallon bucket. Use a variable-speed drill to thoroughly mix the components. Follow the manufacturer's instructions on how much product to mix based on the square footage of the basement. The epoxy product must be used within a five- to six-hour window. Allow the mixture to set undisturbed for at least 15 minutes.
Apply sealer at the floor and at the ceiling of the basement walls, using a 4-inch brush. Brush on the sealer in the same manner that you would brush on paint.
Place the roller screen into the bucket of mixed epoxy and use the roller to cover-coat the wall. Repeat steps 3 and 4 for each wall. Allow the walls to dry overnight.
Repeat steps 2, 3, and 4. A second coat will cover any areas that may not have received a good cover coat during the first application.
Tips & Warnings
- Check the day time and nighttime temperatures and the overall temperature of the basement before beginning the project. For an epoxy sealer to effectively set, the temperature cannot be below 40 degrees Fahrenheit, and is best applied at temperatures over 50 degrees.
- Photo Credit Comstock Images/Comstock/Getty Images
How to Fix Wet Drywall
Wet drywall can be very hazardous to your health. Several types of mold will begin to grow and expand as long as...
The Best Way to Fix a Wet Basement
If your home has a basement, you know the seriousness of excess moisture or a leak. A wet basement indicates a cracked...
How to Treat Basement Walls for Moisture
Basements are notorious for moisture problems, and many of these problems stem from unreliable walls. Most times, basement walls are made of...
How to Seal Damp Basement Walls
Many homeowners have dark, damp basements that resemble dungeons, except for the washers and dryers. While many people think it's normal to...
How to Cure Damp Walls
Condensation is water vapor that develops in your home and can settle on your windows and walls. It can make your walls...
The Chemical Treatment for a Flooded Basement
After a flood in a basement, mold, mildew and fungi are often a result of the damage, and they can ultimately affect...