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One-Time Roof Cleaning — Greater Seattle Metro
One cleaning visit can add years to your roof's life. We apply a roof-safe soft-wash solution that kills moss, algae, and lichen at the root, then carefully remove dead growth and debris from all surfaces — without pressure that strips granules or voids your shingle warranty.
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Roofing
Soft-Wash Process
Low-pressure roof-safe solution applied to the full surface — no granule loss, no voided warranties.
Moss & Algae Removal
Active moss killed at the root and carefully removed from all ridges, valleys, and field shingles.
Lichen Treatment
Lichen chemically loosened and safely removed — can't be pressure-washed without shingle damage.
Debris Clearing
All loose debris swept from the full roof surface, valleys, and into the gutter system.
Preventive Application
Post-clean zinc or copper solution applied to slow moss and algae regrowth after treatment.
Full Roof Walkthrough
Visual inspection during cleaning — we flag any visible damage we spot while we're up there.
One-Time Roof Cleaning — Greater Seattle Metro
A single professional roof cleaning can add measurable years to your roof's service life. In the Seattle Metro — from Bellevue and Redmond to Lynnwood, Edmonds, and Everett — moss and algae growth is one of the primary causes of premature shingle deterioration. Moss roots lift shingle tabs and trap moisture against the deck, creating the conditions for rot and water infiltration. Algae degrades granule bonding over time, accelerating UV damage. A one-time cleaning that removes active growth and applies a preventive treatment addresses both problems and resets the clock on your roof's condition.
We perform one-time roof cleanings throughout the region — Kirkland, Sammamish, Issaquah, Renton, Bothell, Kenmore, Shoreline, Mukilteo, Snohomish, Monroe, Lake Stevens, Marysville, and beyond. Every one-time cleaning includes full roof surface treatment, moss and algae removal, lichen treatment where present, debris clearing from all surfaces and valleys, and a preventive post-clean application. We treat the full roof — not just the visible sections from the street.
A one-time service is the right starting point for homeowners who haven't had their roof treated before, are new to a property, or want to assess their roof's condition before committing to an annual program. After the cleaning, we provide an honest assessment of your roof's condition and how frequently treatment makes sense for your specific home — without pressure to upgrade beyond what's actually needed.
Homeowners who complete a one-time cleaning and want to protect the result often move to our annual roof maintenance program, which schedules 1–2 visits per year timed to PNW moss growth seasons. If the cleaning reveals active shingle damage or signs of water infiltration, our roof repair crews can address those issues separately. When moss damage has already shortened a roof's remaining life, we provide honest assessments of whether a full roof replacement makes more sense than continued maintenance investment. Our Home Care Program covers both roof and gutter maintenance in a single annual plan, and you can get an instant online estimate before committing to any service.
How We Clean
A complete single-visit treatment — from application through removal and preventive coating — designed to maximize the results of one professional cleaning.
Low-pressure roof-safe cleaning solution applied to the full surface kills moss, algae, and lichen at the root without stripping granules. High-pressure washing voids most shingle warranties — our soft-wash method is both more effective and safe for all shingle types.
Treated moss and algae are carefully removed from ridges, valleys, and field shingles after the solution has had time to work. Lichen is chemically loosened before removal — attempting to scrub or blast lichen off without treatment causes significant granule damage.
A zinc or copper-based preventive solution applied after cleaning slows regrowth and extends the results of a one-time treatment — particularly valuable for homes under heavy tree cover in Woodinville, Sammamish, Bothell, and Kirkland.
Seattle Metro
Professional soft-wash cleaning for homes in Bellevue, Everett, Kirkland, Renton, Lynnwood, Shoreline, and across the region — no commitment required.
We treat the complete roof surface — every section of field shingles, all ridgeline caps, valleys, and penetration areas. No partial treatments that leave active moss colonies to re-colonize treated sections within a single season.
Moving into a home in Shoreline, Edmonds, Renton, or anywhere in the metro and unsure of the last cleaning? We assess the current moss and algae load, perform an appropriate treatment, and establish a baseline condition record for your new property.
Moss-covered roofs affect buyer perception and can influence inspection findings during a sale. A professional cleaning before listing shows buyers the roof has been maintained and removes the cosmetic concern before it becomes a negotiation point.
Wind events across the Seattle Metro deposit significant debris on roof surfaces — branches, leaf masses, and seed pods that hold moisture against shingles. We clear all debris as part of the cleaning visit, including from valleys and gutter entries.
While on the roof, we flag any visible damage — lifted shingles, cracked flashing, failing pipe boots — and provide a written note of findings. One-time cleaning clients receive the same inspection attention as our annual program members.
After your one-time cleaning, we'll let you know whether your roof's moss load suggests annual treatment makes more sense than one-time service — with honest reasoning, not a sales pitch. The decision is always yours.
Built for the PNW
The Seattle Metro's mild, wet climate and abundant tree cover make moss and algae growth near-inevitable on most roofs within a few years of installation. Our one-time cleaning process is calibrated for the specific growth types and shingle conditions that PNW roofs develop — not a generic approach applied regardless of climate.
Licensed & Insured
As a licensed and insured roofing company serving homes across the Greater Seattle Metro, we deliver one-time cleaning services with the same professionalism as our annual programs — honest condition assessment, correct cleaning method, and results that genuinely extend your roof's life.
Book a One-Time Roof Cleaning
A one-time roof cleaning is the right starting point for homeowners across King and Snohomish County who are dealing with visible moss, black algae streaking, or heavy lichen growth and want it addressed without committing to an annual maintenance plan. Whether you're preparing a home for listing in Bellevue or Redmond, moving into a property in Kirkland or Sammamish that hasn't been treated in years, or noticing the dark green patches spreading across your north-facing shingles in Woodinville, Bothell, or Kenmore — a single professional soft-wash treatment addresses the current growth and buys your shingles meaningful additional life without requiring an ongoing contract.
Our one-time cleaning uses biodegradable soft-wash solution applied at low pressure across the full roof plane — ridges, valleys, north-facing sections, and all penetration areas that tend to collect the most persistent growth. We don't spot-treat the visible patches and leave the surrounding algae to regrow — we cover the entire surface so the treatment is comprehensive. After application we rinse and inspect, and we flag any shingle or flashing damage the moss growth may have caused that the treatment can't resolve. For homes across Lynnwood, Edmonds, Shoreline, Marysville, Monroe, and Lake Stevens where annual rainfall promotes the fastest regrowth, we'll also recommend a treatment schedule that keeps growth at bay long-term.
One-time cleaning requests surge in April through June when homeowners can finally see the winter's moss growth clearly, and again in September before the heavy-rain season returns. During peak periods our schedule fills out two to three weeks ahead — scheduling before the rush means your roof is treated at the optimal point in the growth cycle. Use the calculator below to get a price estimate based on your home's square footage and growth severity, and we'll book you in across the Greater Seattle Metro service area.