Thinking of Pressure Washing Your Wood Roof in Florida? Read This First.

If you own a cedar shake or shingle roof in Florida, you’ve likely noticed it darken or discolor over time. Mold, mildew, and algae thrive in our hot, humid environment—especially on natural wood. So the instinct is often to pressure wash it clean.

But here’s the truth: pressure washing can seriously damage your cedar roof. At Roof Nuts FL, we’ve repaired dozens of wood roofs that were unintentionally ruined by power washers. Let’s break down why this happens and what you should do instead.

Why Pressure Washing a Cedar Roof Is a Bad Idea

Pressure washing may seem quick and easy, but cedar wood isn’t built to withstand high-pressure water jets. Even “soft washing” with too much force can:

• Strip away natural oils that protect the wood

• Roughen the surface, causing fiber lift and premature splitting

• Force water into the roof deck, leading to mold and rot

• Dislodge shakes or fasteners, especially on older roofs

• Void warranties or create costly repairs down the line

In Florida’s climate, where moisture lingers and sun exposure is intense, this kind of damage accelerates roof failure.

Better Alternatives to Pressure Washing

Instead of blasting your cedar roof with water, we recommend the following safe and effective cleaning methods:

✅ Low-Pressure Soft Wash (By Professionals Only)

We use a controlled system with less than 100 PSI—just strong enough to rinse without damaging wood fibers.

✅ Biodegradable Cedar Roof Cleaner

Specially formulated, non-bleach cleaners break down algae and dirt safely. These are sprayed on and gently rinsed off.

✅ Manual Debris Removal

For heavy leaf buildup or moss patches, soft-bristled brushes and air blowers can safely clear the surface.

✅ Anti-Fungal Treatment After Cleaning

Applying a preventative treatment helps stop regrowth of mold, mildew, or algae—especially in shaded or tree-covered areas.

When Is It Time to Clean a Cedar Roof?

Signs it’s time for a professional roof cleaning include:

• Black streaks or blotches (usually algae)

• Green moss or lichen buildup

• Foul, musty smell from attic space

• Visible water staining or shake discoloration

• It’s been more than 3–5 years since your last cleaning

Regular cleaning not only improves appearance—it extends the lifespan of your wood roof by reducing moisture retention and surface breakdown.

FAQs: Cleaning Cedar Roofs in Florida

Is any pressure washing safe for cedar roofs?
Only under 100 PSI and with the right nozzles and angles. Even then, it should be handled by a wood roofing specialist.

Can I clean the roof myself with a garden hose?
Light rinsing is okay, but avoid aggressive scrubbing or harsh chemicals. It’s always best to let a pro inspect first.

How often should a cedar roof be cleaned in Florida?
Every 3–5 years, depending on shade, tree coverage, and roof pitch.

What happens if I already pressure washed it once?
If damage is minor, we may be able to reseal or retreat the wood. A full inspection will tell you where things stand.

Don’t Let Cleaning Destroy Your Roof

Your cedar roof needs care, not pressure. Avoid the mistake that many Florida homeowners make—and let Roof Nuts FL clean and preserve your wood roof the right way.

📞 Call us today at 904-694-3426 to schedule a cedar roof inspection or cleaning anywhere in Florida—from Tampa to Palm Beach.

Let’s protect your investment—and keep your cedar roof beautiful for decades.