Start washing at the top and work your way down the concrete block wall.
Cleaning concrete block painting.
Regardless of the finish and whether the concrete has already been painted the cleaning procedure is very similar.
Previously painted most of the prep work involves removing all loose or peeling paint and fully evaluating the condition of the block.
First sweep away any surface leaves debris and dirt.
The bad news for the fastidious homeowner is that.
You can use a regular garden hose to spray down the blocks and then scrub with a brush to remove dirt.
Then remove any existing paint or gunk using a power washer or scraper and wire brush.
2 combine 1 cup trisodium phosphate with 1 gallon of hot water in.
Hydrogen peroxide or ammonia also work well too.
Spray the entire wall with water to rinse off dust and dirt.
Spray the wall as necessary while cleaning it so the concrete surface remains moist.
Clean the concrete surface with soap and warm water removing any old paint.
The pressure washer can remove most if not all of the loose paint.
Begin by using a pressure washer.
There are two basic types of finish on concrete block smooth and split face.
Step 1 clean the wall.
Act concrete cleaner is so effective that all you need to do is apply some powder on the stained area spray some moisture and leave it to do all the work for you.
Scrub away any dirt grime or gunk that is stuck to the concrete.
Use a bigger paintbrush for this.
Start by painting the edges of the concrete surface.
Allow the first coat of paint to dry for about 10 hours.
Using a pressure washer on a mild pressure level of 1500 2000 psi will get the job done quickly but it s okay if you don t have access to one.
Since many basements contain high moisture levels they are often installed with cement cinder block walls.
Use the paint roller for painting the areas away from the edges.
Wash the blocks with a pressure washer or hose and scrub brush.
2 dissolve 1 2 ounce of trisodium phosphate tsp.
Thin black and white fungi growth spreads over cement basement walls and leaves behind a musty odor.
Mold and mildew spores flourish in basements that are dim warm damp and poorly lit.
Your supplies are likely to be a bucket scrub brush and detergent.