Safe Roof Cleaning That Extends Your Roof's Life
Low-pressure chemical treatment to remove black streaks, moss, and lichen without damaging your shingles.
Protect Your Investment with Professional Roof Cleaning
Your roof is one of the most expensive components of your home, and those unsightly black streaks aren’t just an eyesore - they’re actively damaging your shingles. At Johnston Pressure Washing, we specialize in soft wash roof cleaning that safely removes harmful organisms while extending your roof’s lifespan.
Understanding Those Black Streaks
The dark streaks running down your roof aren’t dirt or tree sap. They’re caused by Gloeocapsa magma, a type of blue-green algae that thrives in North Carolina’s humid climate. This algae:
- Feeds on your shingles - It literally eats the limestone filler in asphalt shingles
- Strips protective granules - Exposing your shingles to UV damage
- Retains moisture - Leading to premature shingle deterioration
- Spreads rapidly - One affected roof can spread algae to neighboring homes
- Reduces energy efficiency - Dark streaks absorb more heat, raising cooling costs
The longer algae remains on your roof, the more damage it causes. But here’s the good news: professional soft wash roof cleaning stops the damage and restores your roof’s appearance.
Why We Never Pressure Wash Roofs
Many homeowners make the mistake of hiring companies that use high-pressure washing on roofs. This is dangerous for several reasons:
- Strips granules - The protective coating that shields shingles from UV rays
- Damages shingles - High pressure can crack, chip, or dislodge shingles
- Forces water underneath - Creating potential leak points
- Voids warranties - Most manufacturers specifically warn against pressure washing
- Only removes surface growth - Doesn’t kill algae at the root
Our soft wash approach is different. We use very low pressure (less than 100 PSI compared to 3,000+ for pressure washing) combined with professional-grade cleaning solutions that kill algae, moss, and lichen at the root.
Our Roof Cleaning Process
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Ground-Level Inspection: We assess your roof from the ground using binoculars to identify problem areas without walking on your shingles unnecessarily.
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Landscape Protection: We thoroughly wet all plants, grass, and landscaping around your home and cover sensitive areas.
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Low-Pressure Application: Our specialized solution is applied at very low pressure, ensuring it covers all affected areas without disturbing your shingles.
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Dwell Time: The solution needs time to work. It penetrates algae colonies and kills growth at the cellular level.
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Natural Rinse: In most cases, we allow rain to gradually rinse the treatment. You’ll notice your roof continues to improve over the following weeks.
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Follow-Up: We check in to ensure you’re satisfied with the results.
What We Remove
Our roof cleaning service effectively eliminates:
- Black streaks (Gloeocapsa magma algae)
- Green algae and moss
- Lichen (that crusty, grey-green growth)
- Mildew and mold spores
- Accumulated debris and organic matter
Benefits of Professional Roof Cleaning
Extended Roof Life
Regular cleaning prevents algae from deteriorating your shingles, potentially adding years to your roof’s lifespan and delaying expensive replacement. Learn how often you should schedule pressure washing for each surface.
Improved Curb Appeal
A clean roof dramatically improves your home’s appearance. If you’re selling, this can significantly impact first impressions and property value.
Lower Energy Bills
Dark algae streaks absorb heat. A clean roof reflects more sunlight, reducing cooling costs during North Carolina’s hot summers.
Protected Warranty
Our manufacturer-approved methods ensure your shingle warranty remains valid.
Serving Johnston County and Beyond
Based in Four Oaks, we provide professional roof cleaning services throughout:
- Johnston County (Smithfield, Clayton, Selma, Benson)
- Wake County (Raleigh, Garner, Cary)
- And surrounding areas
Get Your Free Roof Cleaning Estimate
Don’t let algae continue damaging your roof. Contact Johnston Pressure Washing today for a free assessment. We’ll inspect your roof and provide honest recommendations based on what we find.
Remember: A clean roof is a longer-lasting roof.
Get a Free Quote
Ready to get started? Contact us for a free, no-obligation estimate.
Service Features
- check_circle Removes black streaks (Gloeocapsa magma)
- check_circle Eliminates moss, lichen, and algae
- check_circle Low-pressure method protects shingles
- check_circle Extends roof lifespan
- check_circle Manufacturer-approved cleaning process
Pricing
Contact us for a free estimate based on your specific needs.
Free estimate required
How It Works
Our Process
Here's what to expect when you choose us for roof cleaning.
Roof Assessment
We inspect your roof from the ground to identify problem areas, algae growth patterns, and any areas of concern.
Landscape Protection
We thoroughly wet and protect your landscaping before beginning any treatment.
Soft Wash Application
Our specialized roof cleaning solution is applied at very low pressure, killing algae at the root without disturbing shingles.
Treatment Activation
The solution works over time, and results continue to improve over the following weeks.
Satisfaction Check
We review the results with you and explain what to expect as the treatment continues working.
Gallery
Our Work
See the results we deliver for our customers.
Try Our Free Cost Estimator
Get an instant estimate for your pressure washing project based on property size and condition.
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What Customers Say About Our Roof Clean
Don't just take our word for it. Here's what homeowners and business owners throughout Johnston County have to say.
"Johnston Pressure Washing transformed our home! The soft wash removed years of algae without damaging our vinyl siding. Our house looks brand new again."
Mike T.
Clayton, NC
"We were worried about those black streaks ruining our roof. They cleaned it perfectly without any high pressure that could damage the shingles."
Sarah M.
Smithfield, NC
"Finally got rid of those stubborn red clay stains on our driveway. Other companies just spread them around, but Johnston actually removed them completely."
David R.
Four Oaks, NC
FAQ
Roof Cleaning FAQ
Common questions about our roof cleaning service.
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Learn More arrow_forwardReady for Professional Roof Clean?
Contact us today for a free estimate. We'll assess your property and provide honest, transparent pricing.