Roof Cleaning in Kirkland
On Kirkland's hillsides, the side of the roof that faces away from the sun is usually the one in trouble. North-facing slopes in Houghton and Norkirk, and roofs tucked under big cedars on Finn Hill, stay damp long enough between storms for moss to settle in and spread.
The shady side of your roof never gets a chance to dry
Moss holds rainwater like a sponge, and on a north-facing Kirkland roof that sees little direct sun, it can stay wet for most of the winter. That moisture works under the shingle edges and lifts them, which is how a cosmetic problem turns into a leak.
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.
A roof that dries out between Kirkland's winter storms
With the moss and algae treated, rain runs off the shingles and into the gutters instead of soaking into a green mat, so even the shady slope gets a chance to dry out between storms.
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 roof only has moss on the north side. Do you treat the whole thing?
Moss tends to show up first on the shady side, but algae streaks often start on the sunnier slopes too, so we'll look at the whole roof when we quote it. Text us a photo of each side and we'll tell you what we see.
The cedars next door drop a lot of debris on our roof. Is that a problem?
Needles and twigs sitting on the roof hold moisture and give moss a head start. Mention it when you text for a quote. Gutter cleaning pairs naturally with roof cleaning, since that debris ends up in the gutters anyway.
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 Kirkland
- 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