Roof Care · 4 min read
Roof moss is almost a fact of life in the Pacific Northwest, but how you remove it makes a huge difference. Do it wrong and you can damage the roof worse than the moss would have. Do it right and you can keep it from coming back for years.
Step 1: Kill it, don't scrape it
The safest removal starts by applying a treatment that kills the moss and loosens its grip, rather than physically scraping or blasting living moss off dry shingles (which takes the granules with it). Once treated, heavy clumps can be gently removed and the rest washes away naturally over the following weeks with rain.
Step 2: Soft wash, never high pressure
Asphalt shingles are protected by a layer of mineral granules. High-pressure washing strips those granules, shortens the roof's life, and usually voids the manufacturer's warranty. A low-pressure soft wash cleans effectively while leaving the shingles intact. This is the core of our roof cleaning approach.
Step 3: Prevent the regrowth
Removal is only half the job. A preventative treatment after cleaning dramatically slows how fast moss comes back, and setting up a maintenance schedule — a light treatment every year or two — means you never have to deal with a heavy, damaging buildup again. It's far cheaper than repeated heavy removals or an early roof replacement.
Related service: Roof Cleaning & Moss Removal →