Synthetic stucco, also known as EIFS (Exterior Insulation and Finish System), adds beauty and insulation to a home—but it’s also delicate. When it comes to cleaning this type of surface, power washing can be helpful, but only if done with care. Blasting EIFS with high pressure can cause cracks, water infiltration, or even delamination. So, what’s the safest way to power wash synthetic stucco? Let’s dive in! 🧼🔍
🧱 What Is EIFS and Why Is It Sensitive?
EIFS is made of layers, including insulation board, a base coat, mesh reinforcement, and a top coat. Unlike traditional cement stucco, synthetic stucco is more prone to water damage if it’s breached or improperly cleaned.
Common Problems from Improper Power Washing:
- Cracking or chipping the top layer
- Forcing water behind the EIFS, leading to mold
- Discoloration from uneven pressure
- Weakening the adhesive or mesh system
⚠️ The number one rule: never use high pressure directly on EIFS surfaces.
✅ Best Equipment for Cleaning EIFS
To safely clean synthetic stucco, opt for the following:
- Low PSI pressure washer: Under 1,200 PSI recommended
- Wide spray nozzle (25–40 degrees): Reduces concentrated pressure
- Soft wash system: Ideal for applying detergents at low pressure
- Extension wands: Help maintain distance without climbing ladders
🧽 Bonus tip: Always test your setup on an inconspicuous spot first!
🧪 Choosing the Right Detergent
You’ll want a non-corrosive, biodegradable detergent designed for synthetic stucco or delicate surfaces. Avoid bleach-based cleaners that can break down the finish or leave streaks.
Good options include:
- EIFS-safe commercial stucco cleaners
- Oxygenated cleaners
- Mild dish soap diluted in water
Mix the solution according to the product’s instructions and apply using a low-pressure soap nozzle.
🪣 Step-by-Step Guide to Power Washing EIFS Safely
- Inspect the Surface 🔍
Look for cracks, holes, or damage. Seal any compromised areas before starting. - Pre-Rinse the Area 💧
Lightly wet the surface with a low-pressure rinse to remove loose dirt and debris. - Apply Detergent 🧼
Use a soft wash system or soap nozzle to coat the surface with cleaning solution. Let it dwell for 5–10 minutes. - Light Agitation (Optional) 🧽
For stubborn spots, use a soft-bristle brush to gently scrub—never use abrasive pads. - Rinse Thoroughly 🚿
Rinse from top to bottom using a wide spray pattern at low pressure. Maintain a distance of at least 2–3 feet from the wall. - Let Dry ☀️
Allow the surface to air dry. Avoid sealing or painting immediately after power washing.
🛑 What NOT to Do
🚫 Don’t use turbo nozzles or zero-degree tips
🚫 Don’t hold the wand too close to the surface
🚫 Don’t allow water to get behind siding or edges
🚫 Don’t pressure wash EIFS that already has damage or moisture issues
🧰 When to Call a Pro
If your synthetic stucco is discolored, cracking, or has a history of water infiltration, it’s best to hire a professional. Many pros use specialized soft-wash equipment and cleaners made specifically for EIFS systems.
🧼 Final Thoughts
EIFS can stay beautiful and mold-free with proper maintenance—but it’s not a job for brute force. Power washing synthetic stucco is possible, but only with the right low-pressure approach, gentle detergents, and techniques. Done correctly, you’ll revitalize your home’s exterior without any risk of damage. 🏠✨
