SEATTLE / BELLEVUE, WA
Roof Cleaning Seattle WA
Moss Is Destroying Your Roof
Seattle’s rain and overcast skies make moss growth on roofs nearly universal. Left untreated, moss lifts shingles and destroys roofs in 3–5 years. We eliminate it completely with professional soft wash.
Get a Free Seattle Roof Estimate →Same-day response · Licensed & insured · 5-star rated
Seattle Moss: The Most Destructive Roof Problem in the Pacific Northwest
Seattle receives 37+ inches of rain annually, combined with overcast skies that prevent UV exposure — the primary natural moss killer. This means Seattle roofs grow moss aggressively year-round. Unlike algae growth in southern climates, Pacific Northwest moss physically lifts shingles from the deck, allowing water infiltration and causing structural damage.
In Bellevue, Kirkland, Redmond, Issaquah, and Renton, moss-covered roofs aren’t just aesthetic issues — they’re structural risks. A fully mossy roof can fail in as little as 3–5 years. Professional soft wash removes all moss and treats the roof to prevent regrowth for 12–18 months.
We also offer zinc strip installation to prevent moss from returning — a Seattle-specific service that’s especially popular in neighborhoods with heavy tree coverage.
Seattle Roof Cleaning Pricing
| Home Size | Roof Area | Price |
|---|---|---|
| Up to 1,600 sqft | ~1,000–1,300 sqft | $549 |
| 1,600–2,200 sqft | ~1,300–1,800 sqft | $649 |
| 2,200–3,000 sqft | ~1,800–2,400 sqft | $749 |
| 3,000+ sqft | 2,400+ sqft | Custom quote |
Seattle pricing slightly higher due to steeper roof pitches and heavier moss removal requirements. Includes zinc treatment.
Seattle Roof Cleaning FAQs
How often do I need roof cleaning in Seattle?
In Seattle, most roofs need treatment every 12–18 months due to the near-constant moisture. Our Zillar Care plan at $329/yr covers annual treatment with a free gutter cleaning included.
Will soft wash kill all the moss on my Seattle roof?
Yes — our cleaning solution kills moss at the root. However, dead moss may take 2–4 weeks of rainfall to fully wash away, which is normal. The roof is biologically clean immediately after treatment.
Are you licensed to work in Washington State?
Yes. We carry $1M+ general liability insurance and are fully licensed in Washington. Certificate of insurance available before we start.