Stucco is a cement-based coating applied to the exterior walls of homes. It’s a popular finishing choice because of its many advantages: it is strong, durable, long-lasting, and adds to the overall curb appeal. Despite its longevity, stucco can develop cracks or other forms of damage that need to be repaired.
These damages may appear as tiny hairline cracks or larger breaks caused by shifting ground, sometimes exposing the wire lath beneath. They often begin around windows and door corners. Here’s how you can handle them step by step:
Start by carefully inspecting the stucco for cracks, chips, discoloration, crumbling areas, moss, or mold. Documenting the size and extent of the issue helps you determine the right repair approach. Keep in mind that some stucco problems might be structural and could require more comprehensive repairs carried out by licensed professionals.
Small issues like hairline cracks or those slightly larger (around 1/32 of an inch) are considered minor and can often be repaired without professional help.
• Hairline cracks: Clean the affected area, then apply a primer coat directly into the crack until it is filled. Once dry, paint over it.
• Slightly larger cracks: First, scrape away loose or rough edges with the sharp end of a paint tool. Fill the crack with ready-mix patching compound and smooth it out. After it dries completely, apply paint to blend the repair with the rest of the wall.
Medium damage usually refers to cracks wider than 1/8 inch or small holes exposing the mesh and lath beneath. While these repairs are more complex, an experienced DIYer may still manage them.
• Gently chip away any loose or damaged stucco with a hammer and chisel, being careful not to damage the wire lath or wood behind it.
• Apply stucco patching compound into the damaged area using a putty knife, trowel, or rubber float. Apply it in thin layers no thicker than ¼ inch at a time, letting each layer set before adding the next. Repeat the process until the surface is level with the original stucco.
Large cracks, gaping holes, or wide areas where stucco has broken away and exposed significant portions of mesh or wood can signal serious structural concerns.
These repairs are often too difficult for DIYers to handle. They can require additional work on wire lath, wood framing, or sheathing. At this point, the smartest choice is to bring in a skilled stucco repair contractor, who has the right tools and experience to restore the wall properly.
Stucco’s three-layer structure explains why expert repair is sometimes necessary:
• Scratch Coat: The base layer that secures the metal lath and provides a foundation. It has scratch-like grooves that help the next coat bond and retain moisture for curing.
• Brown Coat: The second layer, which creates a smoother, stronger surface and prepares for finishing.
• Finish Coat: The final, thinnest layer, which provides texture and color.
Depending on which layer is compromised, repairs may require a complete rebuild from the base up, a process best left to trained professionals.
It’s always better to prevent damage than to repair it later. You can extend the life of your stucco by following these practices:
• Regular Inspection: Check for cracks, discoloration, or other changes after storms or heavy rainfall.
• Proper Drainage: Make sure gutters and downspouts move water away from your home to prevent standing moisture.
• Sealants: Apply a protective sealant to reduce water penetration.
• Landscaping Care: Keep bushes and trees trimmed back to prevent moisture accumulation against the stucco surface.
These preventive steps will help your stucco last longer and save you from costly future repairs down the line.
Stucco damage is common, but with timely action, it can be managed effectively. By identifying whether the issue is minor, medium, or major, you can decide whether to repair it yourself or call in a professional. Quick fixes prevent problems from escalating, while preventive measures can keep your stucco strong and appealing for decades. With the right care, you’ll avoid expensive replacements and keep your home looking its best.