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To repair damaged exterior stucco, you’ll first remove all loose and crumbling material from the damaged area. You then need to thoroughly clean the area and dampen it to ensure proper bonding. After that, you’ll apply a bonding agent to the repair area, then apply new stucco in layers, allowing for curing time between each layer. The final coat should be textured to match the surrounding stucco pattern as closely as possible. Once fully cured, the repaired area can be painted to match the rest of the wall if needed.

All of the components of stucco are non-combustible, so the siding material won’t ignite or spread fire to the interior of your home. However, it also expands and contracts with changes in temperature, so it will crack from long exposure to heat. Eventually, fire will spread through those cracks. Still, stucco is one of the best siding materials for fire protection and can keep you and your family safe for an hour, on average.

The decision to repair or replace stucco depends on the extent of the damage. For minor issues like small cracks, holes, dirt, stains, or discoloration, a repair is typically sufficient and more cost-effective. These issues can often be resolved with a simple repair, a deep clean, and possibly a new coat of paint. However, for more significant problems such as large cracks, peeling, mold, algae, or structural water damage, a replacement might be necessary. In these cases, it is best to call a professional stucco contractor for an inspection. An expert can assess the severity of the damage, determine if there are deeper issues, and advise whether a repair is adequate or if replacing a section or an entire wall is the more cost-effective, long-term solution.

The average cost to repair stucco is about $1,600, with projects ranging from $250 for minor fixes to $6,700 for extensive work. The price is often calculated per square foot, typically costing between $60 and $120. Some professionals may charge an hourly rate of $40 to $50. The final cost depends on the extent of the damage, the type of stucco, your home's location, and whether there is underlying damage that also needs to be addressed.

Costs for specific repairs vary:

• Cracks: $8–$20 per square foot

• Holes: $250–$450 per hole

• Water damage: $30–$50 per square foot

• Chimney repair: $60–$120 per square foot

• Recoating: $4–$5 per square foot

While you may be able to patch small cracks yourself, it is recommended to call a professional for major repairs to ensure the job is done correctly.