Painting Slump Block: What You Need to Know

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Slump block is a construction material found widely in Phoenix home construction. Used for outdoor walls, fireplaces, and even interior walls, these concrete blocks can often be dressed up with a coat of paint. Because concrete has a porous surface that both collects and expels moisture, slump block takes some know-how to ensure an even paint application that will not peel or flake.

Along with the normal preparation that must be done before any exterior or interior painting project, which includes cleaning, scraping and patching cracks, painting slump block has some extra steps. First, efflorescence, that powdery white substance that is often found on blocks, needs to be removed either with a wire brush or pressure washing prior to painting.

It’s essential to use a specialized concrete and masonry primer. This product seals and adheres to slump block and other types of masonry. It’s efflorescence resistant and should be painted over with a high-quality acrylic paint.

Interior Walls and Fireplaces

When it comes to slump block inside a home, paint can go a long way toward making it look less unsightly. Consider painting it to match the rest of the room to make the block blend in. Alternatively, you can make it a unique architectural feature by painting it a contrasting color. For example, painting a slump block fireplace charcoal grey amidst a white wall. You’ll want to choose flat paint unless the room is prone to high humidity, such as an unventilated bathroom. The sheen in high-gloss, satin and eggshell paint will make the texture and mortar stand out.

Exterior Walls

For exterior slump block walls, use a power washer for cleaning and to remove any existing paint. Fill cracks with acrylic caulk and a putty knife. Apply primer and let it dry before applying latex exterior masonry paint.

Choose Painting Professionals

For the best results, choose a professional contractor for painting slump block. It’s well worth the investment. With Ellsworth Home Services, we can help you determine the best options for your home’s slump block and provide quality work that will last for many years. Call us today for a free quote.