Dust off the walls with a dry rag to remove loose dirt and dust.
How to clean concrete walls before painting.
Remove dirt and grease with trisodium phosphate 6 30 per quart concentrate or choose a more earth friendly cleaner like krud kutter s pre paint cleaner 10 for 32 ounces.
How to clean concrete walls before painting.
Spray the wall as necessary.
Smoothing walls before painting is necessary for surfaces previously painted with a gloss or high gloss paint.
Protect the floor around the walls with plastic sheeting.
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.
Examine the walls.
The simple things that you can do in your exterior house 1.
For oil based paint a medium grit sandpaper 100 to 150 grit should be used.
Prepare to mop the concrete with a trisodium phosphate solution tsp.
Cleaning concrete is a vital first step because the porous surface tends to trap dirt grease and oil.
Again wipe away any debris and allow to dry completely.
A soft brush vacuum cleaner hose attachment.
Things that you need to clean before going to the next step of the cleaning times you have to prepare some stuffs.
Fill a bucket.
For previously painted water based paint sand with a fine grit sandpaper.
I once tried cleaning a concrete garage.
How to clean interior concrete walls step 1.
So how to deal with those stuffs.
Scrub the entire wall briskly with a dry stiff bristled scrub brush or a stiff wire brush.
This will catch any drips from the cleaning solution.
A thorough cleaning with a concrete safe cleanser lightens stains and usually removes them completely.
You can and should try applying common detergents directly to the tough spots and scrubbing with a bristle not wire brush.
1 spray the entire wall with water to rinse off dust and dirt.