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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.

Stucco repair can best be described as a patch. It involves identifying the problem and fixing that specific damage with additional stucco. If no mold infiltration or an underlying leak is causing the damage, repair is most likely all you need. 

Remediation, on the other hand, involves removing the existing siding, fixing the underlying cause of the damage, and then reapplying stucco siding for that wall. It’s a more permanent fix that takes longer to complete and, hence, comes with a steeper price tag than repair.

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.

Yes, you can apply the stucco yourself, but it is a time- and labor-intensive project, especially on the exterior of a whole house. DIY stucco is better suited for repairing stucco siding or siding a smaller building, such as a shed or garage. Since most of the cost of stucco siding goes to labor, you can cut down significantly on the total if you’re up for the challenge.