How To Clean Concrete Basement Walls Before Painting. Rinse The Concrete Walls. The next step that you can do is to wring the rag and then try to wipe down your walls.
After waiting for about 30 minutes scrub vigorously but be gentle enough not to cause damage to walls with the bristle brush. If your project is indoors scrub the wall with soapy water and a scrub brush instead of using a power washer. Strip any old paint.
8022021 To make the best result in cleaning the concrete wall that is not already painted you also can add another bucket that you should fill with warm water.
9052021 No DIY advice is ignored as often as the recommendation to thoroughly wash the walls before priming and painting. Scrub the floor using a wire brush to loosen up dirt and grime. Learn why you should hang a fan from the basement ceiling in front of a window to create enough ventilation while you use an epoxy or damp-proofing paint. Use a scraper or wire brush to remove the old paint.