How To Smooth Concrete Walls Before Painting
Use patching compound to fill any holes scratches or gouges in the concrete surface.
How to smooth concrete walls before painting. Wet the pointing trowel and hold it upside down as you scoop the mortar loading up its lower side. You ll probably need to wait about 48 hours after applying primer before you can paint but don t wait more than 30 days to paint. Then remove any existing paint or gunk using a power washer or scraper and wire brush. It s a good idea to test the concrete for moisture before you prime and paint especially if the concrete is fresh.
For exterior projects use a power washer to rid the wall of all dirt and dust. Clean the concrete thoroughly with trisodium phosphate tsp and warm water then let dry. Scrub away any dirt grime or gunk that is stuck to the concrete. If your project is indoors scrub the wall with soapy water and a scrub brush instead of using a power washer.
First sweep away any surface leaves debris and dirt. Masonry paint 20 per gallon can be tinted and is much thicker than exterior paint. Spray the wall with a light mist of water. Step 1 dampen a sponge with warm water.
Clean the concrete surface with soap and warm water removing any old paint. Start at the bottom corner of one wall and in a single. Smooth the concrete with the trowel again making straight lines in the opposite direction if possible. Masonry paint also called elastomeric paint or elastomeric wall coating is a good choice for concrete painting because it contains binders that contract and expand with the concrete.
1 clean loose dirt and dust either sweeping with a broom if it s a floor or. Let the concrete cure completely three to five days. Exterior house paint can crack and peel on concrete. Go back and flatten any raised areas.
Clean the concrete wall. You can then add another texture or wallpaper or paint over it. Skim coating the process of covering rough walls with a thin layer of joint compound will smooth out the wall surface.