Stucco can be damaged by rain, storms, and other environmental conditions. Proper maintenance and preventative measures can help keep your stucco looking great.

Inspect your stucco regularly for cracks, holes, and discoloration. If you notice water damage, Stucco Philadelphia pros should be consulted to address the source of the problem.

Prep the Area

Detecting stucco damage at the first signs of trouble can help you save money, avoid structural damage, and preserve your home’s value. Cracks and holes are the most obvious indicators that it’s time to get to work, but other warning signs of a problem include damp spots on your wall, discoloration, or a musty smell indoors. Water leaks can lead to serious problems, so it’s essential to act quickly when you see any signs of trouble.

Before you start any major repairs, make sure you have the right tools for the job. A moisture meter and a thermal imaging camera can give you the details you need about the state of your stucco. You’ll also need a variety of hand tools, including a pry bar and hammer for removing loose stucco, a trowel, a caulk gun, and a stucco mix. It’s also a good idea to have some personal protective equipment, like safety goggles and gloves.

If your stucco has suffered major damage, it’s best to hire a professional who does this type of work regularly. Major repairs are complex and can involve removing the existing stucco, wire lath work, wood framing, and sheeting. This may require a scaffolding system and specialized skills.

For smaller cracks, you can simply wire-brush and wet the brown coat, and trowel in a new finish. For deeper cracks, you’ll need to undercut the damaged area with a cold chisel. This will widen the bottom of the crack to help it “key in” to the new stucco and prevent moisture from leaking behind the finish.

Next, prepare the repair area by washing it to remove any dirt or debris. Then, you’ll want to protect the exposed lath with the builder’s paper. Cut a piece of paper to fit the exposed area and secure it with construction staples or adhesive. Make sure it overlaps the areas that are already covered by other layers of building paper, and let it dry according to the manufacturer’s instructions. When the builder’s paper is in place, you can proceed with your repair.

Fill the Crack or Hole

Cracks and holes in stucco are often the result of water damage and are an indication that the structure is deteriorating. It is important to address these problems as soon as possible, so they don’t worsen over time. The first step is to clean the area around the damaged section. This will help ensure that the patching materials adhere well and that the repaired section of the wall will blend seamlessly with the rest of the stucco. Using a wire brush, clean the surface of any dirt or debris that is stuck in the cracks or holes. Then use a spray bottle to wet the area surrounding the cracked portion. This will serve multiple purposes; it helps the patching material set better, and it also hydrates the cracked stucco so that it is less likely to continue to deteriorate and crack.

For small cracks, or hairline cracks, that are no wider than a dime it is possible to simply fill them with a latex caulking compound. Make sure that the caulking compound is meant for stucco, and follow the instructions on the label. Once the caulk is dry, apply a coat of acrylic latex paint that matches the rest of the stucco.

Larger cracks or holes that go all the way through the stucco, however, will require more extensive repair. This is because the structure is more prone to water damage, and it is more difficult to seal and waterproof the entire structure when a hole goes all the way through it. Regardless of the size of the hole, it is best to start with an all-purpose stucco patching compound that is mixed according to the manufacturer’s directions. Once the patch is applied, it should be allowed to set up before applying a layer of fiberglass mesh.

Once the mesh is in place, it is time to finish the repair. This can be done by either using a stucco patching compound that is pre-mixed and ready to trowel on, or a conventional stucco mix that needs to be prepared in a plastic bucket or tray following the manufacturer’s instructions.

Apply a Coat of Patching Compound

Using a putty knife, apply a thin coat of patching compound to the crack. Make sure that it is tightly packed into the crack and that it is almost flush with the existing stucco surface. This will help to ensure that rainwater cannot get behind the crack, where it could cause damage and moisture problems. Allow the compound to dry as directed on the product label.

For small cracks that are not separating the sheathing or studs, a paintable high-quality caulking material can be used instead of a stucco patching compound. The caulking material should be sanded to provide a smooth, consistent surface and to match the texture of the surrounding stucco.

If you have larger cracks (about 14 inches wide or wider) or holes, you will need to use a different type of repair material and a more extensive prep process. For these larger cracks and holes, a professional stucco contractor should be called in to troubleshoot and repair the problem.

The first step is to clean the area thoroughly and remove any loose debris or dirt. This will prepare the surface for proper bonding and will prevent water from seeping into and damaging the underlying wood lath supports. The studs or sheathing should also be checked for any signs of water damage. If they have been exposed to water over time, the studs will likely need to be replaced.

Next, the area should be primed. Several products can be used for this purpose, but a good choice is damp concretepPrimer. This can be applied to bare stucco, masonry, or concrete surfaces. It will soak into the large, medium, and small pores in the bare stucco or concrete and help to seal the crack.

Once the primer has been allowed to cure, you can then begin applying the actual stucco patching compound. This can be purchased in a pre-mixed form that is ready to trowel on or in a conventional stucco patch mix that needs to be mixed in a wheelbarrow or plastic tray following the manufacturer’s instructions. For the hole, be sure to apply the patching compound evenly so that it is flush with the existing surface. Once the patching has been allowed to dry, it can be sanded and painted to match the existing stucco.

Paint the Patch

Adding a layer of protection and camouflage to your stucco repair project will help it last longer. Paint will also add extra strength to the repaired surface by covering up imperfections and allowing the patching material to bond with it better.

Before beginning a stucco repair job, it’s important to properly inspect the damaged area and determine the type of damage you are facing. Visual inspections can reveal cracks and holes, but a physical test may be required to check the extent of the damage. A light tap of the stucco surface with a rubber mallet can indicate whether it has separated from its lath support, which indicates deeper damage. A moisture meter can also be used to gauge the amount of water trapped within the walls.

Cracks and holes are not just unsightly—they can be paths for water to seep in and cause more serious issues, like mold growth and structural damage. The most common signs of water damage in stucco include dark spots and discoloration, loose or bulging stucco, and cracks that widen over time. A spongy feel to the stucco, which is caused by trapped moisture, is another indication of moisture damage.

If you decide to tackle a hole or crack yourself, begin by cleaning the area with a wire brush and cleaning it with water using a sponge or a garden hose. This will remove any dirt or debris from the damaged area, ensuring that the patching material will adhere to the existing stucco. If you’re repairing a large hole, use a piece of plywood or other wood cut to fit the size of the hole to create a backing for your repair. Once you’ve cleaned the damaged area, wet it with a sponge or garden hose and then wet the surface of the patching compound, following the manufacturer’s instructions.

Once the patching compound has dried, cover it with plastic and secure it with painter’s tape to prevent accidental splatters. This will also allow the stucco to dry and cure without being exposed to the elements. Once the patch has dried, apply a thin coat of primer to the patched area with a bristle or foam roller and let it dry for two hours or according to the product’s label.