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Stucco Repair – What You Need to Know

stucco repair

Stucco Repair Philadelphia can range from simple caulking to complete remediation. It’s important to solve the underlying problem to prevent moisture penetration and other problems like mold and wood rot.

Use acrylic paintable caulking to seal cracks less than a quarter of an inch wide. Use a cold chisel to open up the bottom of the crack and key in the new stucco for larger cracks.

Stucco is a popular siding choice for homes due to its durability and beauty. However, stucco also can be susceptible to damage. When cracks and holes start appearing on the exterior of your home, it’s important to address them right away before they escalate.

While some stucco damage can be addressed with caulking, other repairs require more extensive work. Depending on the severity of the cracks and damage, you may need to hire a professional for a full repair job. The location of the cracks or holes can also influence the overall cost. If the damaged area is on a second or third story of the house, it will be more expensive to complete the stucco repair because professionals will need ladders and possibly scaffolding to get to the site.

As a general rule, small hairline cracks that don’t exceed 1/8 of an inch can be mended with paintable acrylic caulk. For a more substantial crack, you’ll need to use a stucco patching product. This can be a premixed stucco mix, which is ready to trowel on, or conventional stucco repair mix that needs to be mixed in a wheelbarrow or plastic bucket following the manufacturer’s instructions.

Before beginning the actual patching process, it’s essential to clean the affected area thoroughly. This will ensure that the new stucco patch adheres properly and that any organic materials like dirt or plant growth are removed from the surface of the wall. In addition, it’s important to remove any existing caulking that’s cracked, discolored or peeling from the walls before attempting to patch them.

Water intrusion is a major cause of damage to stucco. Moisture penetration can lead to mold, wood rot and other serious problems. It’s important to inspect the outside of your stucco regularly for moisture issues, such as damp looking stucco after a rainstorm or spots on the stucco that always look wet.

Although stucco resists fire, rot, termite infestations and insect damage better than most other types of siding, it can still be damaged by storms or if the composition of Portland cement, sand and water isn’t properly balanced. If you notice any signs of damage, such as cracks or stains, it’s best to consult a stucco repair specialist for immediate and thorough repair.

Repairing Cracks

Hairline cracks that are less than 1/8 inch wide do not require repair and are a natural part of the plastering process. However, if you notice a crack that is wider than that, it should be addressed. Larger cracks are often the result of seismic changes in foundations, improper base coat curing, or wet mix. These cracks should be addressed as soon as possible so that they do not worsen.

Stucco is a very durable material, but the nature of it means that it can crack over time. Cracks in stucco are not only unsightly, but they can also allow moisture to penetrate the walls and cause mold and mildew problems. To avoid these issues, inspect your stucco annually and have cracks repaired promptly.

To fix small cracks, you can either use a caulking or apply a stucco patching compound. If you decide to use a caulking, choose an elastomeric variety. This type of caulking will allow the area to expand and contract with temperature changes, preventing further cracking. Once the caulking is dry, it should be painted to match your home’s color scheme.

If you are repairing larger cracks, you can use a premixed stucco patching mix. This material can be troweled on with a putty knife and a wire-bristled brush. It is important to use a textured mix so that it matches your existing stucco. You can find these mixes at most construction supply stores and follow the manufacturer’s instructions for application.

Another option is to mesh the cracks and add a light base coat. This will stop the cracks from reappearing but it can be difficult to blend in. It is best to paint the wall after these types of repairs to conceal them.

Finally, you can repair hairline cracks by using a pigmented coating that bridges and seals the cracks. This technique is a good choice if you are not painting the entire wall, or you want the repaired areas to blend in better with the surrounding stucco. You can use concrete paints and stains, mineral paints, lime washes or even a “fog coat” of pigmented cement.


It is inevitable that cracks will form in your stucco walls, and the best way to prevent their expansion is with a patch. This is a manageable job that many homeowners can do themselves. Stucco cracks are not necessarily a sign of structural failure, but they can open up vulnerabilities to moisture accumulation and pest infestations. Cracks can also be the first indication of a more serious issue, so it’s important to check for other problems.

Before beginning any stucco repairs, make sure the area is dry. If there is standing water in the wall, it’s a good idea to dig it out and make sure that there is no damage or mold behind the surface. Then, remove any dirt or debris that has fallen into the crack. This will prevent the patch from clogging with more dirt and debris once it’s applied.

Once the area is clean, cut a piece of house wrap or felt paper to match the size of the repair hole and secure it with a staple gun. Then, seal around the seam with acrylic exterior caulk. Before applying the patch, lightly brush or vacuum any dirt from the cracks with a wire brush to prevent more dust from getting into the holes. Mix the stucco patch according to the manufacturer’s instructions. Ideally, you should only make as much as you can use in 20 minutes because it dries quickly.

For hairline cracks, use a standard caulking gun to apply a paintable stucco patch caulk to the crack. The caulk contains acrylic additives that help it respond to surrounding expansion and contraction, which will keep the crack from becoming larger. The caulk can be sanded with your finger and is ready to be painted once it dries.

If you are repairing a wider crack or hole, use a first-coat stucco mix that is ready to trowel on. Follow the manufacturer’s directions for mixing in a wheelbarrow or plastic tray, and be sure to include the acrylic bonding agent. Wet the edge of the old stucco to help it adhere to the new patch.


Stucco is a popular building material for home exteriors because it’s attractive, energy-efficient, and durable. However, it can be vulnerable to damage from moisture intrusion, especially if you live in an area with high humidity or heavy rains. If you notice signs of stucco damage, it’s important to seek professional remediation to keep the problem from worsening.

There are a few different ways to repair your stucco, depending on the extent of the damage and the cause. If the cracks are small and confined to a few inches, they can usually be repaired with caulking alone. For larger cracks, however, you’ll need to take a more comprehensive approach that requires some extra steps.

First, you’ll need to remove any loose or crumbling stucco from the damaged areas of your house. You can do this by scraping or chiseling away the stucco and exposing the lath (strips of wood that help support the stucco). Once you’ve removed enough stucco to expose the lath, use tin snips to cut away any house wrap or felt paper that may be near the damaged stucco.

Next, you’ll need to prepare the area for patching by cleaning it thoroughly and removing any debris. You’ll also need to mix concrete for your stucco repair, following the manufacturer’s instructions exactly. Once the concrete is mixed, apply it to your stucco, covering all the cracks, holes, and damaged areas. After the concrete dries, paint over it as needed.

Leaking is a major sign that it’s time for a stucco repair. It can be caused by a number of things, including cracked plumbing or water seepage from behind your stucco. Whatever the cause, you should always address it promptly to prevent mold growth and avoid costly repairs in the future.

Stucco repair can seem like a daunting task, but with the right prep work and tools, it’s actually much easier than you think. If you’re not comfortable with doing the full job yourself, you can always contact a trusted stucco contractor for assistance. With the proper care and maintenance, your stucco can last for years without needing replacement.