Does Drywall Need to Be Cut for Waterproofing a Basement?

Identification

• Concrete basement walls are typically waterproofed with a coat of hot tar or asphalt. According to the United States Department of Agriculture (USDA), these types of coatings are effective in reducing moisture damage when applied to an exterior basement wall. Rubber membranes on the exterior basement wall will also provide an effective moisture barrier. If drywall is already in place, you can waterproof your basement on the inside by applying multiple coats of paint. The United States Department Of Energy notes that glossy acrylic paints are the most effective barriers for moisture when applied to the inside of basement walls.

Effects

• Waterproofing your basement will keep moisture from coming into your home and causing damage to its structure. Moisture can cause drywall to become yellow or brown with stains, and it may begin to crumble when saturated with moisture. Mold may also begin to grow if your basement is not properly waterproofed. Prolonged exposure to mold can cause symptoms, such as wheezing and difficulty in breathing. People who have asthma may experience more severe symptoms than those who have no upper respiratory conditions. Mold growth may require removal and replacement of damaged drywall.

Installation

• You can waterproof your basement by applying a hot coat of tar on the exterior basement wall, which should only be applied after the concrete has cured completely. Rubber membranes can also be applied to the basement wall for moisture control. Painting the interior basement walls with many coats of paint will also provide a waterproof coating and prevent moisture damage. Applying multiple coats of paint over your drywall will keep moisture from seeping into the basement.

Considerations

• Waterproofing your basement can be done without disturbing the drywall on your interior basement wall. Applying waterproofing materials to the outside of the basement wall will keep moisture damage at bay. Paint coatings will provide adequate moisture protection when placed over drywall on the interior wall in all but the coldest climates. Inspect other areas around your home to keep your basement as moisture-free as possible. Be sure downspouts carry water at least 10 feet away from the foundation of your home and grade the lot in a manner that directs rain water away from the home. If moisture damage is an ongoing problem, consider installing a sump pump to remove it before it can damage your home.