Soft-Wash Roof Cleaning in Nassau County
Roof cleaning Long Island NY from Pressure Wash Long Island removes black streaks, moss, and lichen with low-pressure soft washing built for Nassau County roofs.
Black streaks are usually Gloeocapsa magma, a cyanobacterium that feeds on the limestone filler in asphalt shingles. Moss and lichen hold moisture against the roof surface, loosen granules, and can shorten the life of the roof when left untreated.
Kevin has been in business on Long Island since 1986, and he and the team do the roof cleaning work. We clean asphalt shingles, architectural shingles, cedar shake, slate, tile, metal, and flat membrane systems without using high pressure on roofing materials.
Most residential roof cleaning jobs run $500–$800. That is a typical average; larger homes and bigger jobs cost more, and your written quote sets the actual price. Price depends on roof size, pitch, material, and buildup. Call (516) 350-8393 for a written quote from Pressure Wash Long Island at 108 Jerusalem Ave, Hicksville.
Safe & Effective Soft Washing
We Clean All Roofing Systems
OSHA Compliant Roof Access
Roof Cleaning Benefits for Long Island Homes
Roof cleaning should never rely on high pressure. We clean under 500 PSI so the solution does the work instead of mechanical force against shingles, slate, tile, cedar, or metal. High pressure strips granules, voids warranties, and accelerates shingle aging. We never use it on roofing material.
Black streaks on roof shingles are usually Gloeocapsa magma. Soft washing treats the growth at the source instead of rinsing the surface and leaving active organisms behind. Without treatment, colonies spread and the damage compounds each season.
We follow cleaning guidelines from GAF, CertainTeed, Owens Corning, and ARMA. Our soft-wash method removes growth without the high-pressure damage that can harm shingles.
Soft-Wash Roof Cleaning
Roof cleaning should never rely on high pressure. We clean under 500 PSI so the solution does the work instead of mechanical force against shingles, slate, tile, cedar, or metal. High pressure strips granules, voids warranties, and accelerates shingle aging. We never use it on roofing material.
Black Streak Removal
Black streaks on roof shingles are usually Gloeocapsa magma. Soft washing treats the growth at the source instead of rinsing the surface and leaving active organisms behind. Without treatment, colonies spread and the damage compounds each season.
Manufacturer Guidelines
We follow cleaning guidelines from GAF, CertainTeed, Owens Corning, and ARMA. Our soft-wash method removes growth without the high-pressure damage that can harm shingles.
Why Long Island Homeowners Choose Pressure Wash Long Island for Roof Cleaning
Roof cleaning is not pressure washing. Roofs need low-pressure soft-wash cleaning, the right solution strength, controlled application, and safe roof access.
Pressure Wash Long Island cleans roofs under 500 PSI to treat black algae, moss, and lichen without tearing granules off shingles or forcing water under roofing materials. We account for the conditions that affect Nassau County roofs: South Shore salt-air exposure, North Shore tree shade, and Central Nassau pollen and road film. Licensed and insured.
Kevin’s background in Long Island home improvement helps us match the cleaning approach to the roof material. Kevin’s wife manages scheduling and customer communication from the office, so the quote, timing, and scope are handled clearly before the job is scheduled.
We provide dedicated roof cleaning pages for Brookville, East Meadow, Garden City, and Oyster Bay.
We also provide house washing, gutter cleaning, window cleaning, paver sealing, gutter guard installation, and commercial power washing across Nassau County.
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Based in
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Nassau County
Licensed
In Business
Since 1986
Roof Cleaning Reviews from Long Island Homeowners
Our Simple Three Step Process
Working with us is easy as...
Getting a quote from Pressure Wash Long Island is fast and straightforward. Tell us about your property and what needs cleaning and we'll review it via satellite. Your written quote comes back before anyone sets foot on your property.
Set A Schedule
Once your quote is approved, our office locks in a date that works around your schedule. We confirm the day, show up on time, and get to work. Kevin and the team lead the job from start to finish.
See the Difference
When the job is done, Kevin or a team member walks the property before we pack up. Every surface cleaned, every agreed area covered, no surprises on the bill. You'll see the difference the same day — and it will still be there six months later.
Black Streaks on Roof Shingles
Black streaks are not just dirt. They are usually Gloeocapsa magma, which feeds on asphalt shingle filler and spreads down the roof with rain. Soft-wash roof cleaning treats the organism directly, restoring the roof’s appearance and slowing the spread of staining across other roof planes. If you want to understand what causes those dark stains before calling, read our guide to black streaks on roof shingles.
Moss and Lichen Roof Cleaning
Moss and lichen are more aggressive than light algae staining. Moss holds moisture against the roof while lichen anchors into the surface and can pull granules loose. We treat both carefully — the process lets the growth release without tearing into the roof material.
Roof Cleaning for Different Materials
We clean asphalt shingles, architectural shingles, cedar shake, slate, clay tile, concrete tile, metal roofing, and flat membrane systems. Each material needs a different pressure level, dwell time, and rinse approach. Cedar does not clean like asphalt. Slate and tile do not clean like shingles.
Safe Roof Access
Roof cleaning carries real risk without proper access, staging, and crew positioning. Pressure Wash Long Island follows OSHA-compliant roof access practices and carries full liability insurance, so homeowners are not hiring an uninsured crew to work above their property.
Built for Nassau County Roof Conditions
Nassau County roofs do not all age the same way. Massapequa and Merrick roofs deal with more salt-air exposure, while Brookville, Glen Head, Roslyn, and Manhasset roofs often hold moisture under mature trees. Plainview, Hicksville, Jericho, Garden City, and Mineola roofs collect heavy pollen and road film from inland traffic corridors.
Protecting Shingles and Roof Warranties
High pressure can strip shingle granules, force water under roofing materials, and create problems that do not show right away. That is why we do not pressure wash roofs. Our method aligns with major roof maintenance standards from GAF, CertainTeed, Owens Corning, and ARMA — cleaning the roof while protecting the material.
How We Protect Your Property During Cleaning
Before any solution is applied, we pre-wet surrounding plant material to protect landscaping from cleaning solution contact. After cleaning, we apply NeutraPods — a professional-grade sodium hypochlorite neutralizer — to break down solution residue before it reaches soil or storm drainage. Where site conditions allow, we install collection barriers at downspout openings to capture runoff. These steps help protect landscaping, drainage areas, and surrounding surfaces during the cleaning process.
Safe Service Process
Roof cleaning areas must stay clear during service. We use professional cleaning solutions, and no one should be outside near the work area while the solution is being applied or rinsed. We confirm the scope in advance, complete the cleaning safely, and can send photos afterward when needed.
Serving Nassau County Homeowners Since 1986
Professional Roof Cleaning
Across Nassau County
Our Core Exterior Cleaning Services
Our Soft-Wash Roof Cleaning Process
Every roof cleaning project follows the same process. Our technicians begin with a ground-level and ladder assessment of the roofing material, contamination type, and any areas of concern — moss in valleys, lichen on north-facing planes, algae streaking across south-facing surfaces.
We apply our biodegradable surfactant solution at low pressure under 500 PSI, allowing the solution to dwell and break down moss, algae, and lichen chemically. A controlled low-pressure rinse removes the residue without mechanical force against the roofing material. The entire process treats the roof biologically — not just cosmetically.
Biodegradable Surfactant Solutions
We use professional-concentration biodegradable surfactant solutions formulated to eliminate Gloeocapsa magma, moss, lichen, and mold without introducing harsh chemicals into your landscaping, soil, or storm drainage. Before cleaning, our technicians pre-wet surrounding plant material as an additional precaution. Our solutions break down naturally after application — responsible cleaning is built into every project, not an afterthought or an upcharge.
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Built for Long Island Roofing Conditions
Pressure Wash Long Island works across all three shore zones. South Shore salt-air deposits a corrosive film that accelerates shingle degradation. North Shore estate tree coverage creates persistent shade where moss and lichen establish fastest.
Inland properties along the Bethpage corridor face full UV exposure combined with heavy seasonal pollen. We adjust our surfactant selection based on where your property sits.
Every Roofing Material We Clean
We clean three-tab asphalt, architectural shingle, cedar shake, natural slate, clay and concrete tile, metal roofing, and flat membrane systems.
Each material needs a different pressure level, dwell time, and rinse approach. Cedar shake does not clean like asphalt. Slate and tile require a different approach entirely.
Roof Washing Long Island Homes Without Damaging the Roof
Roof washing Long Island homes correctly means using low pressure, not blasting the roof. Asphalt shingles, cedar, slate, tile, and flat membrane roofing all react differently to cleaning.
That is why we inspect the material, roof pitch, staining pattern, moss level, and surrounding landscaping before starting. The goal is to remove black streaks, moss, and lichen without damaging shingles, disturbing flashing, or creating runoff problems around the property.
Long Island roof cleaning also changes by location. South Shore roofs often deal with salt-air residue, North Shore roofs hold moisture under tree shade, and Central Nassau roofs collect pollen and road film through the season.
Pressure Wash Long Island provides roof cleaning Long Island NY homeowners can trust for black streak removal, moss treatment, lichen removal, roof washing, and soft-wash roof cleaning across Nassau County. Call or text (516) 350-8393 for a written quote from 108 Jerusalem Ave, Hicksville.
We also serve Levittown, Plainview, Mineola, Garden City, Merrick, Massapequa, Wantagh, Jericho, and Oyster Bay.
(516) 350-8393
Roof Cleaning Long Island NY — Frequently Asked Questions
What causes black streaks on my roof?
Black streaks are usually Gloeocapsa magma, a cyanobacterium that grows on asphalt shingles. It feeds on limestone filler, spreads with rain, and makes the roof look older than it is. Soft-wash roof cleaning treats the organism at the source instead of just rinsing the surface stain. Learn more about what causes black streaks on roof shingles.
Is roof cleaning the same as pressure washing?
No. Roof cleaning should be done with low-pressure soft washing, not high-pressure washing. High pressure can strip shingle granules, damage roof materials, and force water where it does not belong. Pressure Wash Long Island cleans roofs under 500 PSI — soft washing, not pressure washing.
How much does roof cleaning cost on Long Island?
Most residential projects on Long Island run $500–$800. That is a typical average; larger homes and bigger jobs cost more, and your written quote sets the actual price. The final price depends on roof size, pitch, access, material, and the amount of moss, lichen, or black streaking present. We provide a written quote before scheduling so the scope and price are clear.
How often should a Long Island roof be cleaned?
Most Long Island roofs need cleaning every three to five years. Roofs under heavy tree shade or with north-facing sections may need service sooner because moisture stays on the surface longer. Open roofs with better sun exposure may go longer between cleanings.
Can roof cleaning remove moss and lichen?
Yes, but it should not be done by scraping or blasting the roof. Moss and lichen need to be treated with the right soft-wash method so the growth releases without pulling granules or damaging the roof surface. We treat both with the right soft-wash method.
Do I need to be home during roof cleaning?
You do not always need to be home if the scope is confirmed and water access is available. The work area must stay clear while the solution is being applied and rinsed. We can send photos afterward when needed.