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Prepping and Painting Stucco
Create a Durable and Beautiful Finish

Stucco is a beautiful architectural element for both residential and commercial buildings. With a rich history dating back to 1,400 BCE in Greece, it’s a substrate that has stood the test of time. Today, it remains as popular as ever thanks to its natural look and timeless appeal.

 

Like most substrates, stucco is best protected and most beautiful when it is coated with high-quality paint. As a pro painter, it’s worth the time to understand the best techniques and products for coating this substrate in order to estimate properly and create a beautiful, long-lasting finish for your customers.

 

Exterior of home with stucco

​Stucco: Perfect Taupe PPU18-13​ | Trim: Spanish Sand OR-W07​ | Shutters: Rumors MQ1-15​ | Garage Door: Cordovan Brown ST

 

Challenges With Stucco

A blend of sand, cement, and lime, stucco is a textured and porous surface, and while this earthy look adds to its appeal, it also requires an experienced painter’s hand for even, durable coverage.

 

close-up-white-stucco-wall

 

Like all professional paint jobs, the first requirement for success is to properly and thoroughly prep the surface. While surface prep steps are always dependent on the unique situation, here are some things to look for and steps to consider:

 

  1. When new stucco is applied, it holds a lot of moisture. To properly cure, allow a full 30 days before coating.
  2. When fully dry and cured, pressure wash to remove dirt and chalk (allow 24 hours to dry).
  3. Once clean and dry, thoroughly inspect the surface. Keep an eye out for stubborn stains, mildew, cracks, and areas where the previous coating is flaking, bubbling, peeling, or cracking.
  4. To remove any remaining dirt or grease, use a concrete and masonry degreaser and cleaner.
  5. To remove mildew stains, use mildew stain remover.
  6. Spot scrape where there is poor adhesion of the previous coating and prime.
  7. If there are any glossy surfaces, scuff sand and prime.

 

Reminder: Even if you are using a self-priming coating, a primer like BEHR® Multi-Surface Stain-Blocking Primer & Sealer should be used on uncoated, patched, or chalky surfaces.

 

Cracks!

Because temperatures can cause stucco to expand and contract, it’s not uncommon to find small cracks. Be sure to inspect the surface and note the size and shape of each crack. Cracks less than a 1/16” are considered hairline cracks, which means an elastomeric coating will often bridge the gap.

 

If the crack is larger than 1/16”, route out the center of the crack, apply a high-quality stucco patch or caulk, and prime.

 

For cracks that are larger than ¼” or in a diagonal or stairstep pattern, note that it could be a sign of structural damage. If you suspect structural damage, get in touch with a structural professional to assess the situation.

 

Cracked stucco

 

Choosing a Product

When choosing your topcoat, ensure that the coating is specially formulated for the substrate. It’s important that the coating is:

 

  1. Breathable: Moisture trapped inside can cause the topcoat to bubble.
  2. Flexible: This allows for the natural expansion and contraction of the stucco.
  3. Durable: The coating should be able to endure the local weather.

 

For instance, in mild climates, BEHR® Masonry, Stucco and Brick Paint in Flat or Satin sheen are two great choices depending on the sheen your customer desires. Both are mildew resistant, alkali resistant, and are self-priming under the appropriate conditions.BEHR Masonry, Stucco & Brick Paint Flat and SatinHowever, if your customer is in an area that experiences frequent freezing, thawing, or wind-driven rain, BEHR PREMIUM® Elastomeric Masonry, Stucco and Brick Paint is a better choice since this high-build coating is waterproof and can withstand 98 mph wind-driven rain. This 100% acrylic latex formula expands and contracts up to 600% with the substrate.

BEHR PREMIUM® Elastomeric Masonry, Stucco and Brick PaintPainting

Exterior of home with stucco

Stucco: Riviera Beach PPU7-07​ | Trim: Polar Bear 75 | Deck: Cedar ST-146

 

When painting stucco, a little extra effort can go a long way to get every nook and cranny. If you are spraying stucco, be sure to back roll by using a roller that has a minimum of a 1-inch nap.

 

Follow the manufacturer instructions for temperature and color uniformity. Apply as many coats as needed to build to the desired mil thickness.

 

Proper prep, product, and planning will ensure a beautiful result for your customers and can help position your company as a go-to painting company for stucco.

 

To learn more about Behr Paint Company’s products that are ideal for stucco, as well as warranty information, contact your BEHR Pro Rep.

 

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One response to “Prepping and Painting Stucco”

  1. WF Shannon Painting says:

    Backrolling in the state of Arizona definitely. If a painter doesn’t back roll don’t use them. Your paint will not hold up unless backrolled!!

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