Painting Concrete Block Interior Walls
A suitable spray pattern is the 15 degree tip held 12 inches from the surface.
Painting concrete block interior walls. Paint the interior walls of concrete block basements to protect against moisture. The first step when preparing concrete block walls is pressure washing. But concrete is different from regular wall so specials tools and steps must be.
Proper painting of these walls requires the removal of any water and mildew before beginning as well as patching the walls to prevent to growth of mold. Paint your wall with concrete paint. Place a piece of plastic food wrap on the surface and leave it for 24 hours.
Use a commercial style pressure washer and at least 2500 psi. The type of paint you select for interior concrete walls will depend upon the use of the room as well as its décor. Apply the paint to the concrete block with an airless sprayer and then immediately back roll it working in sections along the length of your wall.
Check to see if the concrete has been sealed. If the concrete has not been sealed there will be condensation on the plastic wrap. Paint with a sheen or gloss will be easier to maintain for example.
Paint should be applied in at least 3 thin layers. The paint may be sprayed on rolled on or painted on with a brush. If you re thinking about painting a concrete block wall you should realize that moisture could be a problem and of course moisture will allow paint to separate eventually from whatever you have.
During the preparation pay attention to any loose mortar and large cracks. Painting a concrete wall can change a gray canvas into a colorful statement. Allow to dry for 24 hours.