How to Repair Stucco
Stucco can protect the exterior of your building for years, often for more than a century; however, a chipped and damaged surface threatens its resilience. Depending on the scope of the damage, you can repair stucco without a professional’s help.
Be sure to keep an eye on the weather before you get started as freezing temperatures can ruin wet stucco.
First, make sure you have the right tools for the job including:
- Work gloves and protective eyewear
- Hammer, mason’s chisel and mason’s trowel
- Wire mesh
- Tin snips
- Builder’s paper
Start by carefully removing the damaged stucco and any loose material clinging to the edges of the new hole. Loose material will make it difficult for the new stucco to form a secure bond. Continue until you find stucco safely secured to the wood lath. Be careful not to damage the wood lath behind the stucco. Cut any metal with a set of tin snips.
Use a piece of builder’s paper (we recommend using two pieces) to cover the wood lath. Then add metal mesh over the paper. This provides a strong structure for the stucco to adhere to.
Once you’ve mixed the stucco, apply some to the edge of the old stucco to ensure a secure bond. Then start to liberally apply the new stucco to the metal lath. Smooth the new stucco with a trowel and keep adding to it until it’s about ½” below the surface of the existing material. Before you finish, score the surface of the stucco so the next layer adheres.
Allow the first layer of stucco to dry, or cure, for several days before applying the next layer.
Work from the bottom up to apply the second coat of stucco. Apply the second coat until just below the surface of the existing material. Cover it with plastic and wait three days for it to dry.
Finally, you can apply the texture layer. Wait for the patch to cure and apply paint.
If your stucco seems too damaged to repair by yourself, consider contacting the stucco repair experts at Cornerstone Restoration. We’ll get your building looking great again.