5 Silent Signs of Water Damage Behind Your Stucco
Published on December 21, 2025
Stucco is a popular and durable exterior finish for many homes in Montgomery, Bucks, and Chester Counties. However, when not properly installed or maintained, it can hide a silent destroyer: water intrusion. Unlike sagging vinyl, stucco can look solid on the outside while the wood framing underneath rots away.
Here are 5 silent signs that you might have water damage lurking behind your walls:
1. Dark Streaks or Stains
If you see dark streaks (often called "stucco tears") appearing under windows or near corners, this is a major red flag. It typically indicates that water is getting behind the system and carrying dirt or dissolved minerals out through the stucco, staining the surface.
2. Cracking (Even Hairline Cracks)
While some minor cracking is normal, cracks that are recurrent or wider than a credit card can allow significant moisture entry. Spiderweb cracking can also indicate that the lath underneath is compromised.
3. Musty Smells Indoors
Sometimes the first sign of exterior damage is inside your home. A persistent musty smell near windows or exterior walls often points to mold growth within the wall cavity.
4. Interior Drywall Damage
If you notice soft spots, bubbling paint, or water stains on your interior drywall, the damage has likely advanced significantly. This means water has bypassed your exterior protection, insulation, and vapor barrier.
5. Efflorescence (White Powder)
See a white, chalky substance on your stucco? That’s efflorescence. It happens when water evaporates and leaves salt deposits behind. It’s a sure sign that your wall is retaining moisture.
What Should You Do?
If you spot any of these signs, don't wait. Water damage compounds over time. At DAB General Contractor, we specialize in comprehensive stucco remediation. We don't just patch the cracks; we identify the root cause, repair the underlying damage, and install a moisture management system that protects your home for decades.
Contact us today for a free assessment of your home's exterior.