Paint concrete basement walls to increase the basement's aesthetic appeal and improve moisture control. Concrete is porous and it is not unusual for basement walls to absorb water from the ground and pass it into the house. Painting your basement with a quality paint can help control some of the seepage. A good paint job can also help brighten a space that often suffers from a lack of natural light.
Things You'll Need
- Mild detergent
- Stiff-bristle brush
- Stiff wire brush
- Caulk or epoxy crack sealer
- Low adhesive tape
- Roller brush
- Masonry primer
- Masonry paint
Examine the surface of the wall for efflorescence, a fine, white, powdery substance. Wash away efflorescence with mild detergent and a stiff-bristle brush.
Scrape dirt and loose grit from cracks with a wire brush. Vacuum away residual dust and debris. Seal the crack with 100 percent acrylic, siliconized acrylic caulk or an epoxy crack sealer. Apply the caulk or sealer according to the manufacturer's directions.
Wash the walls with a mild detergent to remove dirt, grease and grime. Rinse the walls with plain water and a clean sponge.
Mask adjacent areas with low-adhesive tape to protect them from the paint. Place dropcloths on the floor to protect it from overspray, splatters and spills.
Apply a masonry primer with either a high-quality ½- to ¾-inch nap roller or 4-inch nylon/polyester brush to reduce the amount of paint you'll need to use to cover the wall, as well as to protect the paint layer from efflorescence and discoloration.
Apply one coat of flat, semi-gloss or satin finish of a top-quality, 100 percent acrylic masonry paint. Fill every pore and void on the wall's surface. Follow with a second coat of paint. Devote extra care toward covering any pores you missed with the first coat.
Remove protective tape, plastic and dropcloths and discard. Discard brushes and rollers or clean according to the paint manufacturer's directions.
Tips & Warnings
- Bring in additional lighting to poorly lit basements so you can see small cracks and to confirm you covered all the spots with primer and paint.
- Expect to use 20 to 50 percent more paint on your masonry or cinder block wall than you would expect to use on a less porous surface of the same area.
- If you have large areas of efflorescence, they will likely return if you do not treat the underlying cause. In most instances, you'll have to address the problem from the outer side of the wall.
- Consult with a professional to evaluate large cracks before you paint.
- Photo Credit Jupiterimages/Photos.com/Getty Images
How to Paint Basement Walls
Basement walls aren't like the other walls in your house. They are part of the foundation, and because they lie below grade,...
How to Waterproof Cinder Block Basement Walls
Your cinder-block basement wall must be waterproofed to provide a proper home environment; otherwise, water will seep in through the walls of...
How to Paint Interior Concrete Walls
Painting interior concrete walls can add warmth to a basement at very little cost. Because concrete is porous, it absorbs a lot...
How to Paint Concrete Block Basement Walls
Painting your concrete basement walls not only helps protect your basement against mold, water, bacteria and mildew but also adds to the...
How to Decorate a Basement Cement Wall
Gray concrete walls can look stylish in an urban loft, but if you have a basement that feels cold and drab, those...
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 Repair Basement Concrete Block Walls
If you are looking at cracks in the exterior walls of your basement, you are looking at cracks in your foundation. Fortunately,...
How to Prep Walls for Drylok
Drylok is a thick paint designed to prevent water from seeping though a block wall and into a basement. You apply Drylok...
What Are the Causes of Basement Cement Walls Crumbling?
One of the last things any homeowner would want to worry about is the integrity of his basement's cement walls. As a...
Ideas for a Basement Using Cinder Block Walls
Cinder block walls are commonly associated with college dorm rooms or drab institutions, but many homeowners also have cinder block walls in...