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Roof Cleaning in Washington State

Power wash roof cleaning services from the experts at Ned Stevens

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If you live in Washington state, you already know what happens to a roof left unchecked through a Pacific Northwest winter. Moss starts as a faint green tinge on the north-facing shingles in fall. By spring, it is visible from the street, holding moisture against the roof surface and working its root structures between granules. Washington’s annual rainfall ranges from 38 inches in Seattle to over 50 inches in areas like Olympia and the Olympic Peninsula, keeping roofs damp long enough for moss and lichen to take hold on almost any asphalt surface. Professional roof cleaning in Washington removes moss, lichen, and algae growth through a safe soft wash process that kills the organisms at the root without stripping the granules that protect your shingles.
Ned’s Home // Services // Power Wash – Roof Cleaning // Roof Cleaning in Washington State

Power Wash Roof Cleaning

The black streaks and stains on your roof are corrosive fungus and bacteria. These microbes can eat into your shingles slowly decomposing your roof.

Our team offers comprehensive roof cleaning and power washing services for homes in New Jersey, Maryland, Connecticut, Pennsylvania, Illinois, Virginia, and other areas. Give our professionals a call at (888) 616-3307 to receive assistance with bacteria and fungus on your roof.

Power washing is better than pressure washing for cleaning your roof 

  • Pressure washing is abrasive and damaging to most roofs  
  • Pressure washing only removes fungus/bacteria on the surface
  • Power wash kills fungus/bacteria build up at the root while pressure washing only removes microbes on the surface

Why Washington Homeowners Need Professional Moss and Lichen Removal

Washington homeowners face a roof cleaning challenge that is different from most of the country. In the Pacific Northwest, moss and lichen are not just a cosmetic issue. They are living organisms that physically damage shingles over time. Moss holds moisture against the roof surface continuously, and in Washington’s wet climate, that moisture never fully dries between rain events from October through April. Lichen, which grows slower than moss and is harder to remove, embeds its root-like structures directly into the limestone granules of asphalt shingles, etching channels that accelerate granule loss each season.

The mistake most Washington homeowners make is reaching for a pressure washer. High-pressure washing removes visible growth but blasts away the protective granules at the same time, shortening the remaining life of the roof by years and potentially voiding manufacturer warranties. Our soft wash process applies a biodegradable cleaning solution at low pressure that kills moss, lichen, and algae at the root. The organisms die in place and rinse away in subsequent rain. No granule loss. No shingle lifting. No water forced under overlapping courses. The 2-year guarantee on our roof cleaning services is backed by this approach because we do not offer a guarantee on work that damages the surface we are cleaning.

Washington roofs face a secondary problem as well: when heavy moss clumps break free during winter storms, they wash directly into gutters and downspouts, creating blockages that cause overflow against foundation walls. If your gutters are overflowing during wet season, significant moss coverage on the roof is often the upstream cause. Professional cleaning of both the roof and gutters addresses the full drainage system before the next Pacific Northwest winter.

Bundle gutter cleaning with other services for additional savings. Try window cleaning, mosquito and tick control, and more.

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(888)616-3307

Roof Cleaning Services Across Washington State

Our roof cleaning services are available to homeowners throughout Washington state, from the greater Seattle metropolitan area and the Eastside communities to Tacoma, Olympia, Everett, Spokane, and the suburban communities of the Puget Sound region. Whether your home is in a densely wooded neighborhood where shade keeps the roof damp year-round or an open suburban lot where wind-borne moss spores still find purchase on the north-facing exposure, our certified technicians understand the specific conditions Washington roofs face and serve the full state year-round.

FREQUENTLY ASKED QUESTIONS

The next time you’re taking a stroll around your property, don’t forget to look up. Over time, you’ll notice black streaks, a layer of green fungus, or even moss build-up – and you’ll know it’s time for a cleaning. Typical power washers damage roofing tiles but with Ned Stevens’ Soft Wash process, our biodegradable cleaning solution kills 100% of bacteria and dirt accumulation with a two year guarantee.
Answer coming soon.
Power washing refers to the highly-pressured system of spraying water from a pressure washer. This method of cleaning can damage the surfaces of your fencing, decks, patio, & more. Soft washing is the gentler and more sanitary process of cleaning surfaces. Soft washing solution is sprayed at a much lighter psi than traditional pressure washes, and the cleaning solution used instead of plain water allows for a more dynamic cleansing experience that rids surfaces of bacteria that causes discoloration.
Answer coming soon.
Answer coming soon.

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(888)616-3307

Schedule Your Washington Roof Cleaning Before Rainy Season

Moss and lichen do not stop growing on their own. In Washington’s climate, an untreated roof adds new growth every wet season, and by the time damage becomes visible indoors, the roof deck is already compromised. The most effective treatment window is late summer or early fall, before the rainy season begins, when moss is drier and more receptive to treatment. Our certified technicians serve homeowners throughout Washington and begin every job with a full inspection of your roof surface and drainage system. Call us today for a free estimate, and ask about bundling with gutter cleaning for complete exterior protection before the next Pacific Northwest winter.

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