Riverbank, CA
Roof Cleaning in Riverbank, CA
We clean Riverbank roofs with soft washing only: low pressure and a sodium hypochlorite solution that kills the organisms causing black streaks and moss. High pressure never touches a roof we work on: it destroys shingles and cracks tile. The streaks die on contact and rinse away with the weather.
Those Black Streaks Are Alive
The dark stains running down Riverbank roofs are Gloeocapsa magma, a bacteria that feeds on the limestone filler in shingles. It spreads on the shaded, north-facing slopes first, and homes near the Stanislaus River see it sooner because of the extra moisture. Left alone, it shortens shingle life. It is not dirt, so pressure will not fix it. Detergent kills it.
Why We Never Blast a Roof
High pressure strips the granules that protect asphalt shingles and cracks or displaces concrete tile. Both mean leaks and early replacement. Our soft wash applies the cleaning solution at little more than garden-hose pressure, lets it do the killing, and rinses gently. The roof gets clean and stays structurally exactly as we found it.
Shingle and Tile, Old and New
Riverbank roofs split roughly by neighborhood age: composition shingle on the older homes around downtown, more tile in the newer subdivisions out toward Crossroads. We soft wash both. On tile we also knock down the moss and lichen that take hold in harvest dust that settles between the courses and holds moisture through the foggy winter months.
Questions We Actually Get
How long do roof cleaning results last?
Several years on most Riverbank homes. Shaded roofs near the river regrow faster than open, sunny ones. The soft wash kills growth at the root, so it does not come right back.
Do you walk on the roof?
As little as possible, and never on fragile tile. Most soft washing is done from ladders and edges, which is safer for the crew and the roof.
Will the streaks disappear the same day?
Most discoloration lifts during the wash. Heavier infestations die immediately but can take a few weeks of weather to rinse fully clean: that is normal and expected.
Ready to make it look new again?
Fast scheduling. Photo-documented results. A written quote before any work starts.