Prep Concrete Block Wall For Paint
Waterproof doesn t mean this is a solution to serious water problems in your basement.
Prep concrete block wall for paint. The first step when preparing concrete block walls is pressure washing. A suitable spray pattern is the 15 degree tip held 12 inches from the surface. Any remaining loose paint will need to be removed manually. Typically you can cover about 200 square feet per gallon of block fill primer on a smooth face and about half that amount on split face.
Paint should be about 1 8 inch thick to ensure waterproofing. The surface is ready for priming when it feels like medium to light grit sandpaper and no residue or loose concrete remains. During the preparation pay attention to any loose mortar and large cracks. Smooth face concrete requires considerably less primer.
Paint your concrete walls with masonry paint. Excess residue may interfere with adhesion of the coating. Apply two healthy coats with a 1 2 in. Examine the walls.
According to reliable builder masonry paint is specifically designed for good adhesion durability and breathability. Thoroughly rinse the concrete surface with clean water using a hose with a high pressure nozzle or a pressure washer. Using a solution of trisodium phosphate tsp and warm water clean the. Clean the concrete wall.
Nap roller and you can clean up with soap and water. How to prep walls for drylok. For exterior projects use a power washer to rid the wall of all dirt and dust. Scrub the entire wall briskly with a dry stiff bristled scrub brush or a stiff wire brush.
Clean the concrete surface with tsp. The texture will determine the amount of primer and paint needed. Repair any cracks or blemishes in your wall with concrete patch. Apply paint with a sprayer roller or brush in even strokes.
You will need a paint that is. Patch gouged or otherwise damaged areas with concrete filler. All it takes is time and some very careful preparation. Use a commercial style pressure washer and at least 2500 psi.
Make sure to prime all mortar as well. Slip on a face mask and safety eyewear to protect your respiratory system and eyes from any harsh dusty residue released into the air by the. When you set out to paint concrete the process.