Expert Guide to Stucco Repair: Fixing Cracked and Buckled Cement-Plaster Siding
- Assessment and Preparation: Begin by thoroughly examining the damaged area to assess the extent of the cracks and buckling. Remove any loose debris, dirt, or old stucco from the surface using a wire brush and a pressure washer if necessary.
- Repairing Cracks: For small cracks, apply a high-quality acrylic caulk into the crack using a caulking gun. Smooth the caulk with a putty knife and let it dry completely. For larger cracks, use a stucco patching compound. Apply the compound with a trowel, ensuring it fills the crack completely. Feather the edges to blend with the surrounding stucco.
- Addressing Buckling: If the siding has buckled, it may be necessary to remove the affected sections. Use a chisel or putty knife to carefully remove the buckled stucco, being mindful not to damage the underlying substrate.
- Replacing Damaged Substrate: Inspect the substrate beneath the removed stucco for any damage. Repair or replace damaged substrate as needed to ensure a solid base for the new stucco.
- Applying Stucco Base Coat: Mix the stucco base coat according to the manufacturer’s instructions. Using a trowel, apply a thin layer of base coat over the repaired area, ensuring it is smooth and even.
- Embedding Reinforcement Mesh: While the base coat is still wet, embed a fiberglass mesh into the stucco. This will provide added strength and prevent future cracking. Ensure the mesh is completely covered by the base coat.
- Applying Finish Coat: Once the base coat has dried, mix the stucco finish coat according to the manufacturer’s instructions. Apply a thin layer of finish coat over the repaired area, blending it with the surrounding stucco for a seamless finish.
- Curing and Finishing: Allow the repaired stucco to cure completely according to the manufacturer’s instructions. Once cured, the stucco can be painted or textured to match the surrounding area for a cohesive look.