Should you wash walls before painting?
Yes, in most cases you’ll want to clean your wall before painters start. Washing walls before painting helps get rid of dirt and grime that could affect how the paint adheres, including primer. You can do this using a wall washer, especially if the top of the wall is hard to reach.
The best way to clean walls is to use a solvent that won’t affect the surface underneath. Some experts recommend using a sponge, warm water and/or a mild detergent or soap. Abrasive washing may remove some of the current pain.
Cleaning painted walls should be done with care. If you’re not comfortable with washing the walls yourself, consider hiring a house cleaner near you.