Rancho Cordova, CA
Roof Cleaning in Rancho Cordova, CA
Rancho Cordova roof cleaning is a soft wash job on every roof we touch. The black streaks are Gloeocapsa magma algae, and our low-pressure sodium hypochlorite treatment kills it without stripping shingle granules or cracking tile. A pressure washer on a roof is how roofs get replaced early.
What is growing up there
Gloeocapsa magma feeds on the limestone filler in composition shingles and shows up as dark streaks running down the slope, worst on north faces and under the mature trees that shade so much of 95670. Homes near the American River Parkway carry extra morning moisture that accelerates it. Tile roofs in the newer 95742 subdivisions grow the same organism along with grime lines at the tile overlaps. All of it dies under soft wash treatment.
Why no-pressure is non-negotiable
Composition shingles are protected by their granule layer, and high pressure strips it off in stripes, aging the roof years in an afternoon. Tile does not tolerate pressure or careless foot traffic either; it cracks, and cracked tile leaks. Our method applies the treatment at little more than rainfall pressure, lets the chemistry kill the growth, and allows weather to finish carrying off the dead material. The roof keeps every year of life it had.
Treatment day and what comes with it
We protect landscaping, manage runoff at gutters and downspouts, and rinse everything the solution touches on the way down. Because we are on the roof anyway, you get photos of anything worth knowing: lifted shingles, slipped or cracked tiles, aging pipe flashings, debris-packed valleys under the big trees. Streaks on treated roofs fade over following weeks as weather scrubs the dead algae, and the roof stays clean for years, not months.
Questions We Actually Get
How long does a roof treatment last here?
Two to four years for most Rancho Cordova roofs. Heavy shade and river-adjacent moisture shorten the interval; open sun extends it.
Do the streaks disappear the same day?
The organism dies immediately and lighter staining fades fast, but heavier streaks weather off over the following weeks. We tell you what to expect based on your roof's buildup.
Can you clean the moss near my roof valleys?
Yes. Moss around shaded valleys and under tree canopy dies with the same treatment, then gets gently cleared once dead so no granules or tile edges are disturbed.
Ready to make it look new again?
Fast scheduling. Photo-documented results. A written quote before any work starts.