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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.

Failing to repair damaged stucco can lead to significant problems. Cracks can grow and deepen, allowing water and moisture to get behind the stucco. This moisture intrusion can cause water damage, structural issues, and mold or mildew growth. Delaying repairs will likely cost more in the long run as the damage worsens, so it's best to repair your stucco as soon as you notice any signs of damage, such as cracks, holes, or discoloration.

Stucco is very challenging to DIY, so it’s always best to leave the work to professional stucco contractors. The same recommendation applies to painting a stucco house, which should be left in the reliable hands of a professional exterior painter. Inexperienced DIYers can make several critical mistakes during stucco application, such as:

• Failing to apply sufficiently thick layers for longevity and water resistance

• Uneven application

• Uneven texture across the exterior

• Mixing the stucco improperly, leaving a weak structure

• Failing to texture properly in between coats, leading to cracking and chipping

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.