Roof Cleaning in Bellevue
Up on the hills in Somerset, Newport Hills, and on Cougar Mountain, Bellevue homes sit higher and catch more weather. Storms push fir needles and twigs onto the roof, where they collect in the valleys and behind chimneys and give moss a place to start.
Storm debris in your roof valleys is growing moss
Needles and twigs that blow onto a hillside roof pile up in valleys and behind chimneys and skylights, and they hold rain against the shingles. Moss takes root in that damp debris first, then spreads outward across the roof from there.
Gentle roof cleaning, never pressure washing
Starting at $200 We inspect the full roof, clear moss and debris gently, then apply a roof-safe treatment that kills moss and algae at the root. Anything that comes down into the gutters or onto the ground goes into your yard-waste bin before we leave, and anything extra leaves with us.
Valleys and chimney edges that drain clear again
With the moss and algae treated, water runs through the valleys and around the chimney the way the roof was built to shed it, instead of soaking into a green mat in the places most prone to leaks.
A roof replaced years early costs far more than treatment
Skip treatment a season or two and granule loss keeps compounding, quietly shaving years off a roof that still had a decade left. Staying on a regular treatment cycle costs a fraction of what a new roof does.
Save on your first service — New customers get 10% off.
Save when you bundle — Request multiple services at once. Fewer trips reduce our carbon footprint and lower your bill.
Save when you subscribe — Repeat every 1, 3, 6, or 12 months.
What's included
- Roof inspection. We walk the roof first to check for existing damage and note anything fragile before treatment starts.
- Gentle cleaning. Moss and debris are cleared gently, without a pressure washer or anything that scrapes the shingles.
- Moss treatment. A roof-safe moss treatment kills moss, algae, and lichen at the root, and keeps working with the next rains.
- Ground-level check. We clear gutters and walkways of anything that washed down and put it in your yard-waste bin (anything that doesn't fit is bagged and taken away), then do a final walk-around to check the shaded, high-buildup slopes.
Worth knowing
Older or already-brittle shingles can be more fragile underfoot, and moss that's been established for years may have already lifted or damaged shingles beneath it. We'll let you know if we spot anything like that before we start, rather than treat over a problem that needs a roofer instead.
Frequently Asked Questions
Our HOA sent a letter about the moss on our roof. Can you help?
Yes. Text us a photo of the roof and the deadline in the letter. You'll get a quote the same day, and we schedule work within the same week.
Do you clear the debris out of the roof valleys?
Yes. Needles and twigs in the valleys and behind chimneys are cleared as part of the roof cleaning, and anything that washes into the gutters is cleared before we leave. It all goes into your yard-waste bin, with any overflow bagged and taken away.
Will this damage my shingles the way pressure washing would?
No — we never pressure wash roofs. High-pressure water strips the protective granules off asphalt shingles and can void your roofing warranty. We clean gently, without pressure washing or scraping, and a roof-safe moss treatment does the rest, so moss and algae come off without damaging the roofing material underneath.
How often does a roof need moss or algae treatment?
Most Eastside roofs benefit from treatment every 1-2 years. Shaded, north-facing slopes under trees tend to need it more often than sun-exposed sections, since moss spreads fastest wherever moisture lingers.
Other services in Bellevue
- Gutter Cleaning
- Move-Out Cleaning
- Driveway Pressure Washing
- Patio & Deck Washing
- Siding & House Washing
- Fence Washing
- Window Cleaning
Roof Cleaning in other Eastside cities
Roof Cleaning across the Eastside · All services · Our service area