Professional Roof Cleaning & Moss Removal in Bellevue
We use low-pressure soft wash systems to safely remove moss, algae, lichen, and black streaks from every roof type — restoring curb appeal and extending your roof's lifespan by years.
Protect Your Home's Most Important Asset
The Pacific Northwest climate creates the perfect conditions for moss, algae, and lichen to thrive on your roof. Left untreated, these organisms trap moisture against your shingles, leading to premature deterioration, leaks, and costly replacements.
Our professional soft wash process eliminates growth at the root level and includes a preventive treatment that keeps your roof clean for 2+ years — saving you thousands compared to early roof replacement.
What We Remove From Your Roof
Every one of these issues damages your shingles, reduces your home's value, and gets worse over time.
Moss Growth
Thick moss traps moisture under shingles, causing rot, lifting, and leaks. Our treatment kills moss at the root.
Algae & Black Streaks
Gloeocapsa magma creates dark streaks that spread across your roof, making it look decades older than it is.
Lichen & Mold
Lichen bonds to shingle granules and tears them off as it grows. Mold creates health concerns and decay.
Debris & Leaf Buildup
Trapped debris in valleys and around flashings holds moisture and accelerates shingle deterioration.
We Clean Every Roof Type
Our equipment and techniques are calibrated for each material to deliver the deepest clean without any damage.
Composition Shingles
The most common roof in the PNW. We use low-pressure soft wash to protect granule adhesion.
Cedar Shake
Gentle cleaning that preserves the wood grain while eliminating moss and mildew from every shake.
Tile & Concrete
Safe pressure settings for concrete, clay, and composite tile without cracking or dislodging.
Metal Roofing
Oxidation removal and soft wash treatment that restores the finish without scratching or dulling.
Bellevue's Roof Cleaning Specialists
We've cleaned hundreds of roofs across the Greater Eastside. Our team is trained specifically in Pacific Northwest roof conditions — we know the moss, the moisture, and the methods that actually work long-term.
Every job includes a full inspection, eco-friendly cleaning products, and our 2+ year moss-free guarantee. We're licensed, insured, and never subcontract our work.
Roof Cleaning Results
How We Clean Your Roof
A proven 4-step system that delivers a spotless roof without any risk of damage.
Inspection
We walk your roof and assess the type, condition, growth severity, and any areas of concern before we begin.
Soft Wash Treatment
We apply a biodegradable cleaning solution at low pressure that kills moss, algae, and lichen at the root level.
Gentle Rinse
Using calibrated low-pressure water, we rinse away all dead growth, stains, and debris — no high-pressure damage.
Preventive Treatment
We apply a zinc-based preventive treatment that inhibits regrowth for 2+ years, keeping your roof clean longer.
Roof Cleaning Questions
Everything you need to know about professional roof cleaning in Bellevue.
Most residential roof cleanings in Bellevue range from $350–$800 depending on roof size, pitch, and the severity of moss or algae growth. We provide free, no-obligation quotes — typically within 1 hour of your request.
We never use high-pressure washing on roofs. Our soft wash method uses low-pressure application with specialized cleaning solutions that kill moss and algae without stripping shingle granules or voiding your manufacturer warranty.
Most residential roofs take 2–4 hours to complete, depending on size and the amount of growth. We handle everything in a single visit — no need to schedule a return trip.
Our preventive zinc-based treatment inhibits moss and algae regrowth for 2+ years. Most customers schedule a maintenance cleaning every 2–3 years to keep their roof in top condition year-round.
Yes. We use biodegradable, plant-safe cleaning solutions and pre-wet all landscaping before we begin. We also rinse everything thoroughly after the job. Your plants, lawn, and garden beds are protected throughout the process.
Light rain doesn't affect our soft wash process — the solution still bonds to the growth and does its job. However, for safety reasons, we reschedule during heavy rain, high winds, or icy conditions. We'll communicate proactively if weather affects your appointment.
Roof Cleaning Across the Eastside
We provide professional roof cleaning throughout King County's Eastside communities.
Ready for a Moss-Free Roof?
Get a free, no-obligation roof cleaning quote. Most estimates returned within 1 hour.