Go back and flatten any raised areas.
How to smooth concrete walls before painting.
Before you paint and after you seal your concrete you need to prime your wall.
First sweep away any surface leaves debris and dirt.
Then remove any existing paint or gunk using a power washer or scraper and wire brush.
Clean the concrete thoroughly with trisodium phosphate tsp and warm water then let dry.
Smooth the concrete with the trowel again making straight lines in the opposite direction if possible.
Clean the concrete wall.
Use a concrete primer which will help you get a smooth even surface that the paint can stick to.
Clean the concrete surface with soap and warm water removing any old paint.
Scrub away any dirt grime or gunk that is stuck to the concrete.
Skim coating the process of covering rough walls with a thin layer of joint compound will smooth out the wall surface.
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.
Exterior house paint can crack and peel on concrete.
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.
Let the concrete cure completely three to five days.
1 clean loose dirt and dust either sweeping with a broom if it s a floor or.
Step 1 dampen a sponge with warm water.
Spray the wall with a light mist of water.
Wet the pointing trowel and hold it upside down as you scoop the mortar loading up its lower side.
For exterior projects use a power washer to rid the wall of all dirt and dust.
You can then add another texture or wallpaper or paint over it.
Masonry paint 20 per gallon can be tinted and is much thicker than exterior paint.
It s a good idea to test the concrete for moisture before you prime and paint especially if the concrete is fresh.
Start at the bottom corner of one wall and in a single.