Moss is working its way under your shingles right now
That thick moss isn't just sitting on the surface — it holds moisture against the roof deck and creeps under shingle edges as it grows. Left alone, it accelerates granule loss and rot, shortening the life of a roof that should last decades.
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 deck no longer holding moisture against itself
Moss and algae are killed at the root, not just knocked off the surface, so the shingles stop trapping the moisture that leads to rot and early replacement. You'll see a big difference immediately, with the rest clearing over the next rains.
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
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.
Is it safe to walk on my roof for cleaning?
Our crews are equipped and experienced for roof work, including care around brittle or aging shingles. We'll flag anything that looks too fragile or already damaged before we start rather than risk making it worse.
Will all the moss disappear right away?
The treatment kills moss and algae at the root immediately, but some dead moss can take a rain cycle or two to fully rinse away and wash off the roof on its own. You'll see a big difference right after treatment, with the rest clearing over the following weeks.
Serving Kirkland, Bellevue, Redmond, Issaquah, and Sammamish, and the surrounding Eastside. See our full service area.
