San Ramon, CA
Roof Cleaning in San Ramon, CA
San Ramon roofs get soft washed, never pressure washed. Our low-pressure sodium hypochlorite treatment kills the organisms staining the roof, black streaks, lichen, and moss, without loosening a granule or cracking a tile. High pressure on any roof shortens its life, so it never appears on ours.
Reading a San Ramon roof
The black streaking on composition shingles is Gloeocapsa magma, a bacteria feeding on the limestone in the shingle itself, and it colonizes north slopes first because they hold winter damp longest. The tile roofs across the 94582 hills grow lichen along the tile edges and moss in shaded channels. Foothill dust feeds all of it by holding moisture against the surface.
The no-pressure rule
A pressure wand strips composition granules like a sandblaster and cracks concrete tile at the edges. Both failures let water where it should never be. Soft washing works at little more than garden-hose pressure while the detergent does the killing and cleaning. On tile we also minimize foot traffic, since careless walking breaks more tiles than weather does.
Longevity and appearance in one job
The streaks make a roof look old, and in San Ramon's HOA neighborhoods that draws attention. But the bigger issue is material: growth holds moisture, moisture degrades shingles and underlayment, and the roof ages faster than it should. One soft wash resets both problems and typically holds three to five years here.
Questions We Actually Get
My roof streaks are only on one side. Why?
That is the north or shade side, where winter moisture lingers. Gloeocapsa magma grows where damp lasts. We treat the whole roof so the clean side stays that way.
Do you clean tile roofs without walking on them?
As much as possible. We work from ladders, ridges, and walk pads, keeping tile contact minimal.
Does roof cleaning help before selling a home?
Noticeably. Listing photos are shot from the street and the roof is a third of the frame. A streak-free roof photographs years newer.
Ready to make it look new again?
Fast scheduling. Photo-documented results. A written quote before any work starts.