Pleasanton, CA
Roof Cleaning in Pleasanton, CA
We clean Pleasanton roofs exclusively by soft washing: a low-pressure sodium hypochlorite treatment that kills the black streaks, moss, and lichen without disturbing a single shingle or tile. High pressure never touches a roof we work on, because it strips shingle granules and cracks tile.
Those black streaks are alive
The dark stains running down Pleasanton composition roofs are Gloeocapsa magma, a cyanobacteria that feeds on the limestone filler in shingles. It spreads across the Tri-Valley on summer winds, then flourishes through wet winters, especially on north slopes shaded by mature trees in the older 94566 neighborhoods. It will not rinse off. It has to be killed.
Why pressure has no place on a roof
Blasting a composition roof strips the protective granules and can shorten its life by years. On the tile roofs common in newer 94588 subdivisions, high pressure cracks tiles and drives water under the underlayment. Soft washing does neither. The detergent does the work; the rinse is gentler than winter rain.
What a clean roof buys you
Curb appeal is the obvious win, and in a market like Pleasanton's, roof staining shows up in listing photos. But the practical case matters more: Gloeocapsa magma holds moisture against shingles and slowly eats the limestone binder. Killing it protects the roof you already paid for. Results last three to five years in this climate.
Questions We Actually Get
Will roof cleaning damage my shingles?
No. We never put high pressure on shingles or tile. Soft washing uses roughly the pressure of a garden hose plus a detergent that does the actual cleaning.
Do you clean tile roofs?
Yes. Concrete and clay tile roofs across Pleasanton get the same low-pressure treatment. We also minimize roof walking on tile, which cracks under foot traffic.
How long do results last?
Typically three to five years. Homes under heavy tree cover in older Pleasanton neighborhoods sit at the shorter end because shade keeps roofs damp longer.
Ready to make it look new again?
Fast scheduling. Photo-documented results. A written quote before any work starts.