Pressure washing a roof

Professional Roof Washing

Roof Washing in San Diego

Your roof protects everything beneath it — but in San Diego’s coastal climate, it’s constantly exposed to sun, moisture, airborne salt, and organic growth. Over time, algae, moss, lichen, and dirt begin to break down roofing materials and create those unsightly black streaks you see on many homes.

At JAB Exteriors, we provide professional roof washing in San Diego using a safe, low-pressure soft washing system that removes buildup without damaging shingles or tiles. Our process restores your roof’s appearance while helping extend its lifespan.

If your roof is stained, streaked, or showing green growth, it’s time for professional cleaning.

Why Roof Cleaning Is Important in San Diego

San Diego’s environment creates the perfect conditions for roof contamination:

  • Coastal moisture feeds algae growth

  • Warm temperatures accelerate biological buildup

  • Salt air breaks down roofing materials

  • Tree debris traps moisture

  • UV exposure weakens protective layers

The black streaks commonly seen on asphalt shingles are caused by a bacteria called Gloeocapsa magma. Left untreated, it spreads and retains moisture, accelerating shingle deterioration.

Routine roof washing helps prevent premature aging and protects your investment.

Signs Your Roof Needs Washing

You may need roof cleaning if you notice:

  • Black streaks on shingles

  • Green moss or algae growth

  • Dark patches

  • Debris accumulation

  • Staining along roof valleys

  • Uneven roof coloration

If caught early, soft washing can prevent more expensive repairs later.

How Often Should You Wash Your Roof?

In San Diego, most homes benefit from roof washing every 2–3 years.

Homes with:

  • Heavy tree coverage

  • North-facing slopes

  • Coastal exposure

  • Higher humidity zones

may require more frequent cleaning.

Routine maintenance is significantly more affordable than early roof replacement.

Safe Soft-Wash Roof Cleaning

We never use high pressure on your roof. Our professional soft washing system uses low-pressure water combined with specialized cleaning solutions to safely eliminate algae, moss, and black streaks at the root. This method protects shingles, tile, and roofing materials while delivering longer-lasting results — ideal for San Diego homes exposed to sun and coastal moisture.

Protect Your Home & Investment

Your roof is one of the most expensive components of your home. Professional roof cleaning helps extend its lifespan, prevent costly repairs, and maintain property value. Removing harmful organic growth early is far more affordable than replacing damaged roofing materials later. A clean roof instantly enhances the appearance of your entire property.

Built for San Diego’s Coastal Climate

San Diego’s salt air, UV exposure, and marine layer create the perfect environment for roof staining and deterioration. Our roof washing service is specifically designed for Southern California conditions, helping prevent premature shingle breakdown while restoring your home’s curb appeal. Routine maintenance every 2–3 years keeps your roof looking clean and performing properly

Benefits of Professional Roof Washing

✔ Extends roof lifespan
✔ Improves curb appeal
✔ Protects property value
✔ Reduces moisture damage
✔ Removes harmful organic growth
✔ Prevents costly repairs

A clean roof instantly improves the appearance of your entire property.

FAQ

Is roof washing safe for shingles?

Yes. We use a low-pressure soft washing system designed specifically for roofing materials.

How long does roof cleaning take?

Most residential roof washes are completed within a few hours depending on size and condition.

Will the stains come back?

Algae may eventually return, but our treatment removes growth at the root level and typically lasts 2–3 years.

Is roof washing worth it?

Absolutely. Replacing a roof can cost tens of thousands of dollars. Routine cleaning helps delay replacement and preserve materials.