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Extraction wand pulling dirt out of a white plush carpet — Green Choice also offers roof washing in NYC, Westchester and Long Island
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Roof Washing With a Soft-Wash Method Safe for Shingles

Those black streaks aren't dirt — they're algae, and pressure washing a roof the wrong way can damage shingles. Our soft-wash method removes it safely, across NYC, Westchester and Long Island.

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What's included in our roof washing service

The black streaking most homes eventually develop is algae, not dirt, and it spreads by airborne spores landing on shingles. High-pressure washing can strip the protective granules off asphalt shingles, which is why we use a soft-wash method instead — low pressure combined with a cleaning solution designed to kill algae and moss at the source.

Every visit starts with a full roof inspection to identify the material and the extent of algae or moss growth. A preventative treatment can also be applied to slow regrowth and extend the time before the roof needs washing again.

  • ✓Full roof inspection (shingle / tile / metal)
  • ✓Soft-wash method (low pressure, no shingle damage)
  • ✓Algae & moss treatment (the black streaks)
  • ✓Gutter clearing available as add-on
  • ✓Eco-safe, plant- and pet-safe runoff
  • ✓Ladder-safe, insured crew
  • ✓Preventative treatment extends time between washes
  • ✓100% satisfaction guarantee
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Our roof washing process

01

Inspect

We identify the roofing material and assess the extent of algae or moss growth.

02

Apply solution

A cleaning solution targets algae and moss at the source rather than just knocking streaks loose.

03

Soft-wash rinse

Low pressure rinses the roof clean without stripping protective granules from shingles.

04

Preventative treatment

An optional treatment slows regrowth, extending the time before the roof needs washing again.

Real results

Asphalt Shingle
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Algae Removal
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Gutter Clearing
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Roof washing available in every zone we serve

Click your area for local pricing and scheduling.

Why Green Choice for roof washing

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20+ years experience

Family-owned, serving NYC since 2005.

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Fully insured crews

Background-checked, trained technicians.

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Eco-safe products

Safe for kids, pets and allergy-sensitive homes.

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Same-day service

Most zones can be scheduled same day.

Roof washing pricing
Small roof (under 1,500 sq ft)From $249
Standard roofFrom $349
Gutter clearing add-onFrom $89
Large roof / estateCustom quote
Final price depends on roof size and pitch — confirmed before we start, never after.

Frequently asked questions

Is roof washing safe for asphalt shingles?
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Yes, when done with a soft-wash method. High-pressure washing is what damages shingles by stripping protective granules; our low-pressure approach avoids that risk entirely.
What causes the black streaks on my roof?
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Those streaks are typically airborne algae, not dirt or mold, which is why simple rinsing doesn't remove them — the cleaning solution needs to actually kill the algae at the source.
How long does the roof stay clean after washing?
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Results vary by climate and shade exposure, but a preventative treatment applied after washing can meaningfully slow how quickly algae returns.
Do you clear gutters during a roof washing visit?
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Gutter clearing is available as an add-on to any roof washing appointment.
Is it safe to walk on my roof for this service?
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Our crews are trained and insured for roof access, and the soft-wash method itself is typically applied from ladders or extended equipment rather than requiring extensive roof walking.

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