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Roof Cleaning Plainview NY
Roof cleaning in Plainview NY from Pressure Wash Long Island removes black algae streaks, moss, and lichen with low-pressure soft washing that protects asphalt shingles without stripping granules. We work out of 108 Jerusalem Ave in Hicksville, one corridor west up Route 135 — a short drive from most local roofs.
Those dark streaks running down the shingles are Gloeocapsa magma, a blue-green algae that feeds on the limestone filler in asphalt roofing. It spreads through airborne spores and stains the roof sections that stay damp the longest.
Most residential jobs here run $500–$800, with a written quote before any work is scheduled. Call (516) 350-8393 to get on the calendar.
Roof Washing Plainview NY Without Damaging Shingles
Roof washing in Plainview NY should be done with low-pressure soft washing, not high-pressure power washing. High pressure can strip protective granules, lift shingle edges, and force water under the roof system.
The cleaning solution should do the work. The rinse should be gentle enough to protect asphalt shingles, architectural shingles, cedar shake, slate, tile, and flat roof systems.
Homes near wooded lots, tight side yards, and shaded back slopes often show black streaks first. Once algae is joined by moss or lichen, the roof needs a more careful treatment plan, because forcing growth off too soon can damage the surface.
Black Streak Removal
Roof-Safe Soft Washing
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Black streaks on these roofs are usually Gloeocapsa magma, an algae that feeds on the limestone filler inside asphalt shingles. We treat the growth with a roof-safe solution instead of trying to blast the staining away.
Asphalt shingles should not be pressure washed. Our method uses low pressure, controlled application, and solution strength matched to the surface condition, roof age, and type of growth.
Local homes often have shaded side yards, older roofs, mature trees, and north-facing slopes that hold moisture. We look at roof pitch, runoff path, landscaping, gutters, and access before starting the work.
Black Streak Removal
Black streaks on these roofs are usually Gloeocapsa magma, an algae that feeds on the limestone filler inside asphalt shingles. We treat the growth with a roof-safe solution instead of trying to blast the staining away.
Roof-Safe Soft Washing
Asphalt shingles should not be pressure washed. Our method uses low pressure, controlled application, and solution strength matched to the surface condition, roof age, and type of growth.
Central Nassau Roof Protection
Local homes often have shaded side yards, older roofs, mature trees, and north-facing slopes that hold moisture. We look at roof pitch, runoff path, landscaping, gutters, and access before starting the work.
A Plainview Roof Cleaner That Actually Works Down the Road
Kevin started working on Long Island homes in 1982, and that home improvement background matters when a roof needs cleaning. Roof cleaning is not about blasting shingles clean. It is about knowing when a roof can be safely treated, what pressure level is appropriate, and how to protect the property below it.
Matthew leads the soft-wash work in the field, and our office keeps scheduling and written quotes moving so the timing and scope are clear before anyone gets on a roof. Most residential roof cleaning jobs run $500–$800, depending on roof size, pitch, staining, moss or lichen growth, access, and property protection.
Being one town west means we know the Plainview-Old Bethpage housing stock — the split-levels and ranches near Manetto Hill Road, Old Country Road, and Washington Avenue, and the shaded side yards that keep north slopes damp long after a rain.
Pressure Wash Long Island is licensed and insured, and we follow low-pressure roof-cleaning methods designed to protect asphalt shingles and other roofing materials. Homeowners here also book us for house washing, gutter cleaning, and window cleaning, and you can see the full process on our roof cleaning Long Island page.
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Why These Roofs Streak
Black streaks here are usually Gloeocapsa magma, which grows well in damp, shaded conditions and spreads through airborne spores. It tends to show up on the roof sections that get the least direct sun.
We see it most on north-facing planes, rear slopes under mature trees, and homes with leaf buildup near gutters. This area sits inland with no coastal salt exposure, but pollen, humidity, shade, and older asphalt still create strong algae conditions.
 Black Streaks, Moss, and Lichen Are Not the Same
Black streaks are usually algae. Moss is thicker and greener and holds water against the shingles like a sponge, while lichen is flatter, crusty, and grips into the surface.
They are not removed the same way. Heavy moss or lichen often needs treatment first, then gradual release, instead of aggressive removal on the first pass.
 Older Roofs Get Looked At First
If a roof is already brittle, curling, or shedding granules, cleaning may not be the right call. Kevin or Matthew walks the property before any work starts to check roof condition, because treating a roof past its service life can do more harm than leaving it alone.
 Roof Cleaning Cost in Plainview NY
Most residential jobs run $500–$800. Larger roofs, steep pitches, heavy moss, lichen, difficult access, or extra plant protection can raise the price.
We provide written quotes before work is scheduled. Most estimates are handled by satellite first, and an onsite check confirms the roof condition and access before treatment.
Our Roof Soft-Wash Process
We apply a roof-safe solution at low pressure and let it dwell so it can treat the algae, moss, or lichen. The roof is then rinsed or left to release naturally depending on the material and growth level.
The goal is to kill the growth at the source without damaging the shingles. That is the difference between cleaning the roof and damaging it for a cleaner-looking result.
Landscaping and Runoff Protection
Roof runoff matters, especially around foundation plantings, patios, walkways, and gutters. We pre-wet surrounding plant material, rinse during the work, and control runoff where the roof drains. Where runoff is a concern, NeutraPods may be used as part of the protection plan.
The roof is only half the job; the property below it has to be protected too.
Roof Materials We Clean
We clean asphalt shingles, architectural shingles, cedar shake, slate, tile, and flat roof systems. The cleaning method is adjusted to the roofing material so algae, moss, and lichen can be treated without damaging the surface.
Plainview and the Surrounding Towns
This is Central Nassau work for us, not a distant service area. We are based one town over in Hicksville and regularly work near Plainview Road, Manetto Hill Road, and Old Country Road, which keeps scheduling practical for nearby work.
We also clean roofs in nearby Oyster Bay, Glen Head, and Brookville. If your roof has black streaks, moss patches, or shaded areas that stay damp after rain, call (516) 350-8393.
Plainview NY Raves About Our Roof Cleaning
Roof Cleaning in New York
Pressure Wash Long Island was great for all the jobs was done, and they always answer the phone on time, arrive on time, great service ! I am sure I will use this company every year for power washing and roof cleaning.
Roof Cleaning in NY
Great service, extremely helpful and informative. looking forward to call them again for roof cleaning.
Roof Cleaning NY
Pressure Wash Long Island were on-time, reasonably priced - extremely polite. And my house and windows look amazing! Excellent roof cleaning service!
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 Matthew lead the job from start to finish.
See the Difference
When the job is done, Kevin or Matthew 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.
See the Difference on Your Roof
Scroll over any photo to see a streaked, algae-stained roof go from grime to clean.
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Get Roof Cleaning in Plainview NY
Call Pressure Wash Long Island at (516) 350-8393 when your roof shows black streaks, green moss patches, or lichen spots that keep spreading. The earlier the growth is treated, the easier and cheaper the cleaning usually is.
We are at 108 Jerusalem Ave, Hicksville, NY 11801 — licensed, insured, and a short drive up Route 135. Written quotes, no surprises on the bill, and Kevin and Matthew leading the work start to finish. If you want to understand the staining first, read why black streaks show up on Long Island roofs.
(516) 350-8393
Roof Cleaning Plainview NY — Frequently Asked Questions
How much does roof cleaning cost in Plainview NY?
Most residential roof cleaning jobs in Plainview run $500–$800 with Pressure Wash Long Island. The price depends on roof size, pitch, how heavy the algae or moss growth is, roof access, and how much landscaping protection the property needs. We send a written quote before scheduling, so you know the cost before any work begins.
Can my Plainview roof be pressure washed instead of soft washed?
No — asphalt shingles should not be pressure washed. High pressure strips the protective granules, lifts shingle edges, and can drive water underneath the roofing. Plainview roofs get low-pressure soft washing, where a roof-safe solution treats the algae and the rinse stays gentle enough to protect the shingles and keep the warranty intact.
Why does only one side of my roof have black streaks?
The streaks usually appear first on north-facing and shaded roof slopes because they get the least sun and stay damp longest. In Plainview, side yards crowded by mature trees hold that moisture even longer. The algae establishes where the roof dries slowest, which is why one slope can stain while the sunny side stays clear.
Will the black streaks come back after cleaning?
They can, because algae spores travel through the air and keep landing on the roof. A proper soft wash removes the active growth and slows the return, but shaded Plainview roofs may stain again within a few seasons. Homes with north slopes and heavy tree cover usually need maintenance sooner than open, sunny roofs.
Do you clean roofs other than asphalt shingles?
Yes. We soft wash asphalt and architectural shingles, cedar shake, slate, tile, and flat roof systems. The low-pressure principle stays the same, but the solution and approach are adjusted to the material so the cleaning is safe for that specific roof. Kevin or Matthew checks the roof type and condition before any work starts.
Is my Plainview roof too old to clean?
Sometimes. If a roof is brittle, curling, or shedding granules heavily, soft washing may do more harm than good, and we will tell you that honestly. That is why we look at the roof before quoting work onsite — a roof near the end of its service life is often better left alone than cleaned.