Stucco is known for its durability, aesthetic versatility, and energy efficiency. However, like all building materials, it is not immune to wear and environmental challenges. Homeowners often overlook early signs of damage, which can lead to more expensive repairs down the road. In this guide, we cover the most common stucco problems—and how professional contractors diagnose and fix them effectively.
1. Cracking
Hairline cracks are common in stucco due to expansion and contraction from temperature changes. However, larger cracks may signal structural movement or poor installation. If left unaddressed, cracks can allow moisture to seep behind the surface, leading to mold, mildew, and material separation.
How Pros Fix It: Small cracks are sealed using elastomeric caulking or patching compounds. For larger cracks, professionals may remove and reapply sections of the stucco, reinforcing the area to prevent recurrence.
2. Staining and Discoloration
Brown, black, or green stains on stucco can indicate algae, mold, or efflorescence (salt deposits from moisture escaping through the wall). These stains are not only unattractive but can point to deeper water issues.
How Pros Fix It: Contractors identify the source of moisture, clean the surface using safe, non-acidic solutions, and apply sealants or coatings that help prevent further growth or staining.
3. Bulging or Warping
A section of stucco that bulges outward may indicate delamination—when the layers of stucco lose adhesion. This is often caused by water intrusion or improper installation of the lath or base coat.
How Pros Fix It: Professionals remove the compromised section, inspect for water damage behind the wall, and reconstruct the lath and stucco layers as needed. Proper drainage is also evaluated and adjusted.
4. Moisture Intrusion
Moisture entering behind stucco is one of the most serious issues. It can cause rot in underlying wood framing, degrade insulation, and lead to mold.
How Pros Fix It: Pros use moisture meters and infrared cameras to locate problem areas. Repairs include resealing joints, flashing, installing weep screeds, and in some cases, replacing entire sections with new stucco systems.
5. Impact Damage
Physical impacts from lawn equipment, ladders, or accidental hits can cause chips, holes, or cracks in stucco. While these may seem minor, they compromise the finish and open the surface to moisture damage.
How Pros Fix It: Small chips are patched and repainted with color-matched finishes. Larger areas may require cutting out and reapplying the affected section using the correct layering technique.
Conclusion
Stucco issues may start small, but if ignored, they can escalate into major repairs. Routine inspections, proper maintenance, and professional repair work are essential to keeping your stucco walls in top shape.
Noticing cracks or stains on your stucco? Let Total Exteriors Pro perform a thorough inspection and deliver expert repairs that restore both function and beauty to your home.
