Home / Roof Cleaning
Roof Cleaning & Moss Removal in Fort Collins
Those dark streaks are gloeocapsa magma, a hardy algae that eats the limestone filler in asphalt shingles. Pressure washing a roof voids most warranties. This doesn't.
What a roof treatment covers
Roof cleaning is the one job where pressure is never the answer. High pressure strips the granules that protect asphalt shingles, taking years off the roof and voiding most manufacturer warranties in the process. The industry-standard method — and the one ARMA recommends — is a no-pressure chemical application that kills the organism and lets weather rinse the residue over the following weeks.
- Asphalt and architectural shingle
- Black streaking (gloeocapsa magma)
- Moss and lichen
- Concrete and clay tile
- Gutter and downspout flush
- Full landscape protection
- Skylight and vent detailing
- Post-treatment inspection photos
How the job runs
- Photos and a fixed priceRoof pitch and access change the number, so a photo from the street plus one from the yard is ideal.
- Protect everything belowDownspouts get diverted, beds get soaked, and anything sensitive is covered.
- No-pressure applicationSolution is applied from ladder and pole. Nobody drags a wand across your shingles.
- Rinse and documentGutters are flushed and you get before-and-after photos, including the parts you can't see.
Questions
Will this void my roof warranty?
No — the opposite. Pressure washing a shingle roof voids most warranties. A no-pressure chemical treatment is the method shingle manufacturers actually recommend.
How fast do the streaks disappear?
The algae dies immediately. The black staining lightens over two to six weeks as rain rinses the dead organism off. Moss goes brittle and washes away over a similar window.
Is it safe for my gutters and plants?
Yes, with the prep we do. Downspouts are diverted away from beds, plantings are soaked before and after, and we flush the gutters at the end.