Shaw Island · Shaw Landing
Moss Treatment & Roof Cleaning on Shaw Island
Kill the moss, protect the roof — the PNW way, without a pressure washer. Serving Shaw Landing, Blind Bay.
San Juan Roofing Co. provides moss treatment & roof cleaning for homes across Shaw Island, from Shaw Landing to Blind Bay. Small, quiet, and ferry-limited — Shaw jobs take planning. We batch material and crew logistics so your roof gets done in one efficient mobilization.
Moss is the number-one roof killer on shaded island roofs. It holds moisture against the shingles, lifts them, and rots the deck underneath. Our damp, tree-covered north slopes on Orcas and San Juan grow it fast.
Why moss treatment & roof cleaning matters on Shaw Island
Limited ferry service to Shaw means we stage materials carefully — one trip, done right. Under Orcas’ firs, moss is a when-not-if problem. A yearly treatment costs a fraction of the deck rot it prevents.
What our Shaw Island moss treatment & roof cleaning includes
- Low-pressure, granule-safe cleaning (no pressure-washing shingles)
- Targeted moss & algae treatment
- Zinc / copper ridge strips to prevent regrowth
- Gutter clearing & debris removal
- Annual maintenance plans for shaded roofs
Shaw Island price range
$400–$1,600
Gentle treatment + cleaning for an average roof. Heavy moss, steep pitch, and multi-story access raise the range.
Estimate for a typical Shaw Island home — not a quote. Free on-island inspection gives your real number.
Learn more about our moss treatment & roof cleaning service, or see all roofing on Shaw Island.