How to Paint Indoor and Outdoor Concrete Walls

Concrete Walls Painting

Painting concrete walls can be elegant and make it blend in with the rest of the area’s decor. Concrete painting is trickier than painting most surfaces: It breathes, transports moisture, and sucks up paint. Painting concrete walls requires more skill, tools, and time than throwing a coat on drywall.

Painting concrete walls

There are some things to consider when painting concrete walls. You must choose the appropriate type of concrete paint, determine if the wall is sealed from moisture and apply primer prior to painting the wall. Use these tips to paint a concrete wall. While you can paint drywall in a day or two, you’ll need a week or more to finish painting concrete.

Steps to paint Concrete Walls

1. Clean the concrete wall. 

Cleaning concrete is a vital first step because the porous surface tends to trap dirt, grease, and oil. Use a power washer for exterior projects to rid the wall of all dirt and dust. If your project is indoors, scrub the wall with soapy water and a scrub brush instead of using a power washer.

2. Check Wall Moisture

Paint applied to a wall that is not properly sealed will not adhere properly. Tape plastic sheeting to the wall and attempt to get the sheeting as air-tight as possible. Check the plastic after 24 hours. If moisture appears within the plastic, you will need to seal the wall. If no moisture is present, the wall is already sealed.

3. Seal Interior Concrete

Water moves easily through porous concrete, so sealing interior walls is necessary to prevent moisture from seeping in, promoting mold growth and that cold. Follow the directions to mix up the concrete patch mixture. Fill holes and use a trowel to smooth the patch to match the surface of the wall.

seal interior concrete

4. Choose paint To Painting Concrete Walls

Always select paint which is appropriate for your concrete walls. You have to choose a paint that is resistant to moisture and sun exposure. An oil-based and acrylic paint also may work for painting outdoor and indoor concrete walls.

5. Prime the ConcreteConcrete primer for painting concrete walls

Concrete primer, called block primer, fills pores and evens out the surface. Primer dries in two hours; wait at least eight hours, but no more than 30 days, to paint.

6.  Paint the concrete walls

Paint should be applied in at least 3 thin layers. The paint may be sprayed on, rolled on or painted on with a brush. The paint should not be streaky or show brush strokes. Allow to dry for 24 hours.

7. Roll on concrete paint sealer

Cover with 2 coats, allowing it to dry between coats. Paint sealer helps the paint to adhere to the wall and last longer.

Foot Note: No matter how you apply paint, let it dry for a day between coats. Usually, you need two to three coats, so check the long-range weather forecast before you begin.




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