How to paint the walls of your basement

Paint the walls of your basement not only it serves to improve their appearance, but can protect your home from moisture damage. The basement walls are generally porous cement, so that moisture can accumulate there and grow mold. This can cause damage to the structure. Use these tips to paint the walls of your basement.

  1. Remove the old paint from the walls. The masonry paint sticks to the porous walls, so you should remove any paint that has already before repainting. If you do not, would the freshly painted wall cracks or air bubbles, which would cause it to flake. Use sandpaper or a wire brush for this process.
  2. Fill cracks and holes in the concrete. To repair the walls of your basement, using fast – setting hydraulic cement, which is available in most home stores. Use the manufacturer ‘s instructions for application.
  3. Remove mildew stains.
  • Take two tablespoons of bleach to a quart of warm water. Use a sponge or cloth wet with the solution to scrub the stain until it disappears.
  • Use a commercial rust remover, which can get in a store for home, where they buy paint.
  1. Clean the walls. The walls of the basement must be free of dust, dirt and oil before you start painting.
  • Remove loose dirt with a broom. Rubbing clean the walls with a damp cloth.
  • Clean the walls with a trainer, a product that serves to harden the surface. This makes the paint stick better and you can get at any home store. Follow the instructions on the product for your application.
  • Use trisodium phosphate (TSP) to clean the walls. The TSP is an alkali used for cleaning masonry surfaces. You can get it at any store for home. Follow the instructions on the product for your application. Please note that this product is very toxic and is not allowed in certain places because of problems with the environment.
  • Hire a cleaning company masonry for their services. Masonry professionals who specialize in clean basement walls use highly toxic products such as muriatic acid. Do not try to use this product yourself. Even the smallest contact can cause severe burns and blindness.
  1. Let the walls dry.
  2. Choose the paint specially designed for concrete and masonry. The concrete sealer will adhere to the walls better than normal basement and give more durability and protection.
  3. Mix the filler. Without removing the lid, stir quickly to mix the sealer.
  4. Check the primer in a bucket or paint tray.
  5. Applies the filler. Covers generously entire surface of the walls with the filler.
  • Use a large brush polyester / nylon or a roller to apply the sealer. The brush should be between 5 and 8 cm. To use a roll cover between 1 and 2 cm.
  • First make the edges of the walls. Begins to apply the sealer in a corner and then along the edges of the walls (also in conjunction with the chest and the floor) by a line of 5 cm.
  • Spread the primer on the walls in sections of 1 x 0.5 meters. While you apply, review joints for consistent coverage.
  1. Let the primer dry completely. At least 8 hours.
  2. Choose a paint for walls. It should be a waterproof paint masonry, especially for porous cement surfaces. Water resistance will function as a moisture barrier.
  • Choose a color that complements your decor. Masonry paint comes in a wide range of colors and can be purchased at any home store.
  1. Mix the paint. Without removing the cap, vigorously stirring the paint to mix the contents.
  2. Use a paint tray.
  3. Paint the walls of the basement. For best results and greater protection against moisture, apply two or three coats of paint.
  • Use a brush polyester / nylon or a roller to apply the paint. The brush should be between 4 and 10 cm. If use a roller, this should have a cover of between 1 and 2 cm.
  • Begins at the edges. Begins a corner and follows the connections of the walls, ceiling and floor making a contour of 5 cm.
  • Paint the walls in sections of 1 x 0.5 meters. While you apply the paint, review the above to have a consistent cover. To prevent water from dripping paintbrush, hit her against the tray or bucket after soaking to avoid excess paint.
  • Let the paint for 4 hours between each layer you go to apply dry.
  • Evaluate your work after the second coat of paint. You may need to apply a third or retouch certain parts.
  1. Let the paint dry completely.


  • Before you start painting, out of the room at any pet or object that could be damaged by paint or fumes from this. Move furniture to the center of the room so do not be obstacles when you go to paint.
  • If your basement is freshly made, you should let the cement dry for 30 days before painting.
  • Contact your waste collection service for disposal of paint and primer unused.
  • Paint the walls of your basement in a ventilated room with a temperature between 10 and 30 degrees Celsius. If your basement has windows, open them and also consider using a fan to increase ventilation.


  • The paint fumes can be toxic, especially for children and pregnant women. Keep pets, children and pregnant women out of the basement when they are painting.
  • When you clean the walls with chemicals, wear protection, especially gloves and safety glasses. Chemicals can cause burns and blindness.

Paint your basement may contain lead, which is toxic and can cause severe health problems. Always wear a mask when you line up the previous painting the walls. Immediately clean the paint serves with a vacuum cleaner or mop.

Paint products can be harmful if ingested. Keep them away from pets and children.