Moss prevention treatment is what keeps your roof clean long after the moss is gone. After a soft wash, we apply a protective solution that makes the roof surface inhospitable to new moss and algae growth.
For Shoreline homeowners, prevention is the difference between cleaning every year and cleaning every few years. Timed before the wet season, it dramatically slows the regrowth our climate encourages.

Applied after a soft wash for maximum protection on a clean roof.
Timed before Shoreline's wet season to slow regrowth when it matters most.
Keeps roofs clear far longer than cleaning alone.
Proudly serving Shoreline, Lake Forest Park, Kenmore, Edmonds, Mountlake Terrace and Bothell for 12+ years.
From soft wash moss removal to preventative treatments and gutter care, our services are built around one goal: keeping Shoreline roofs healthy in a climate that constantly works against them. Explore what we offer below.

Beyond Shoreline, we bring soft wash roof cleaning and moss removal to neighboring communities that share the same coastal moisture and heavy tree canopy. Whether your roof is shaded by tall conifers or sits in an open lot, our methods are built for the way moss grows across this region.
Frequently Asked Questions
Roof Cleaning can be complex, and we’re here to provide answers to common questions. Here are some frequently asked questions from our clients.
In Shoreline's coastal Pacific Northwest climate, most asphalt shingle roofs need a soft wash moss treatment every 12 to 18 months. Tree-shaded properties near Boeing Creek and Innis Arden hold moisture longer and may need attention sooner.
Yes. Moss lifts and curls asphalt shingles as it spreads under them, trapping moisture against the roof deck. Left untreated through Shoreline's wet winters, it shortens roof life and can lead to leaks and premature replacement.
We do not pressure wash asphalt shingle roofs. High PSI strips protective granules and voids most manufacturer warranties. We use a low pressure soft wash method that kills moss at the root without damaging the shingle surface.
Pricing depends on roof size, pitch, moss severity, and canopy coverage. We provide a clear written quote after assessing your property, so Richmond Beach and Ridgecrest homeowners know the full cost before any work begins.
No. We protect landscaping and rinse surrounding areas as needed. Our soft wash solutions break down moss safely, and we take care around gutters and downspouts that drain toward Shoreline's mature plantings.
With a proper soft wash and a preventative treatment, most Shoreline roofs stay clear for 18 months or longer. Adding zinc strips slows regrowth further, especially on north facing slopes shaded by tall conifers.
A prevention treatment applies a protective solution that stops moss and algae from re-establishing. For Shoreline's wet climate it extends the time between full cleanings significantly.
Most Shoreline roofs benefit from a preventative application every 12 to 18 months, timed before the heavy fall and winter moisture that drives regrowth.
Yes. Prevention is most effective on a clean roof. Applying it after a soft wash keeps Ridgecrest and Richmond Highlands roofs clear far longer than cleaning alone.
We select solutions that control moss while minimizing impact on the landscaping and waterways that matter in the Shoreline area, and we rinse and protect plantings as needed.
Keep Moss Off Your Roof for Longer
We pride ourselves on delivering great results and experiences for each client. Hear directly from home and business owners who’ve trusted us with their Roof Cleaning needs.
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17534 Stone Ave N, Shoreline, WA 98133
Mon–Fri: 8 AM–6 PM Sat: 9 AM–3 PM Sun: Closed