Protecting your Home’s Concrete Exterior

Dec 4, 2020 by Joseph Sanchez

The weather here in Puerto Peñasco is sunny and beautiful each day, but the salt and sand in the air are a corrosive combination that wreak havoc on your home’s exterior, so it is important that your home’s exterior is protected by taking the following steps to properly paint and protect your investment.

The homes here in Puerto Peñasco are constructed using block and mortar with a 1/4″ concrete finish on the exterior walls to make them smooth. Concrete painting is a bit more difficult to paint than most surfaces because concrete breathes, transports moisture, and sucks up the paint, so it is important that the job is done correctly for best results.

Clean the Concrete
Cleaning the concrete exterior is very important before you paint because concrete is a porous material, and it can easily trap dirt that will spoil the finish. Power washing your home’s exterior is an efficient method to preparing the exterior surface and ensuring it’s clean. During power washing if you notice the old paint is flaking off then you will want to sand off any remaining existing paint.

Patching Cracked Concrete
Concrete finishes are very susceptible to cracking and chipping, so before painting your home it is essential that you fill in any cracks with an epoxy crack sealer. In some instances, you may have large patches of concrete that need repair and, in this case, you should patch those areas with a concrete bond material or cement bond. Properly preparing your home’s surface using these methods will ensure a professional appearance while maintaining your exterior finish.

Seal the Concrete
After you clean and patch all the cracks and damage it is now time to seal your exterior concrete walls. Water moves easily through porous concrete so sealing the exterior walls is essential to prevent moisture from seeping in, promoting mold growth and that “damp basement feel”. Use any masonry sealer of your choosing and carefully follow directions for mixing, applying, and curing the sealer. Some sealers may require 5 to 7 days for it to cure so make sure you follow the manufacturer’s recommendations for application.

Prime the Concrete
Once you’ve applied the sealer and allowed it enough time to cure, it’s time to prime your concrete. This is an important step because the prime will fill in the pores and evens out the surface which will give you a great appearance in the end. Again, you can choose any primer you want, just make sure it’s a concrete and masonry bonding primer. It typically takes only two hours for primer to dry, but wait at least 8 hours and no more than 30 days to paint.

Paint the Concrete
When choosing your paint make sure to purchase masonry paint because it contains binders that will contract and expand with the concrete. Using exterior house paint will crack and peel especially in this salt and sand-air environment. You will want to use a high-capacity 3/4 inch this roller or a texture roller. We recommend Sherwin-Williams paint for all your painting needs and they are located here in town behind the Santander Bank.

About the author: Joseph Sanchez is president of Rocky Point Home Builders a design/build contractor specializing in custom home design, construction and renovations. He resides here in Puerto Peñasco with his wife and three children and is originally from Chicago. For more information email him at sales@rockypointhomebuilders.com

Workers smooth out the new concrete finish in preparation to paint on a recent home renovation in Las Conchas.

A worker applies a sealant to a sea wall in Las Conchas. Sealing concrete is a very important step that must be implemented before you paint.

The final step of the painting process is applying the paint and we recommend masonry paint because it contains binders that will contract and expand with the c

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