Roof cleaning (low-pressure) — San Francisco
Treat moss and algae on composition shingles without granule loss.
Fog, sea spray, and foot traffic leave sidewalks, storefronts, and siding dull fast. Blue Bay Wash restores curb appeal with soft-wash house washing, safe roof treatment, and flatwork cleaning tuned for SF’s mix of Victorian wood, stucco, and concrete. Walking every roof isn’t always necessary or wise. Where appropriate, we apply manufacturer-aligned treatments that target gloeocapsa magma streaks and moss at the edges, then rinse gently or let rain finish the cycle per product guidance.
Why homeowners call us
- Focus on longevity of shingles—not a cosmetic blast that voids warranties
- Gutter face and downspout outsides rinsed when roof package is selected
- Honest assessment if mechanical removal is safer deferred to a roofer
How we work
- 1
Roof type check
We confirm material, age, and obvious damage before quoting treatment.
- 2
Edge and moss work
Careful detail on heavy moss at leading edges; protect landscaping below.
- 3
Treatment and rinse plan
Application per slope; rinse timing matched to slope and drainage.
Other services in San Francisco
Roof cleaning — San Francisco
Bundle with house washing or driveway cleaning and save on mobilization.