Stucco has a beautiful, textured finish — but it’s also one of the most delicate exterior materials. So the question is: can power washing damage stucco? The answer is yes — absolutely — if it’s done with too much pressure or the wrong technique.
Why Stucco Is So Vulnerable
Unlike brick or vinyl siding, stucco is porous and brittle. It can:
- Crack or chip under high pressure
- Absorb water and lead to mold or mildew
- Lose its surface texture or finish
- Allow moisture into the wall system if sprayed improperly
Even hairline cracks can widen quickly under the force of a pressure washer.
Key Risk Factors
- Pressure Levels: Anything over 1,500 PSI is too much for stucco. A soft wash system is usually recommended.
- Water Angle: Spraying upward or directly into cracks can drive water into the wall cavity.
- Stucco Condition: Older or already-damaged stucco is especially prone to flaking or crumbling.
- DIY Mistakes: Using the wrong nozzle or getting too close can ruin the finish in seconds.
Safe Cleaning for Stucco Surfaces
The safest way to clean stucco is with a soft wash system — a low-pressure rinse paired with a gentle detergent. Professional crews are trained to assess your surface, apply the right cleaning solution, and rinse carefully without causing damage. When it comes to stucco, professional service isn’t just a convenience — it’s a smart protective measure.
