Soft-Wash Roof Cleaning in Greater Sacramento
Those black streaks running down a roof are not dirt — they are living algae, and the moss behind them lifts shingles and holds moisture. PROSPR clears both with a low-pressure soft wash that protects the roof, the warranty, and the look of the whole home.
Why roofs are never pressure-washed
High pressure tears the protective granules off asphalt shingles, cracks tile, and voids most manufacturer warranties. It is one of the fastest ways to shorten a roof's life. Every reputable roofing manufacturer specifies low-pressure, solution-based cleaning instead — which is exactly what we do.
How PROSPR cleans a roof
We apply a roof-safe cleaning solution at low pressure that kills the algae (the Gloeocapsa magma responsible for black streaking) and the moss at the root. As with any soft wash, the staining continues to clear over the following weeks as the dead growth weathers and rinses off in the rain. We protect landscaping below and rinse surrounding surfaces so nothing downstream is affected.
We do not walk a brittle or steep roof unnecessarily, and we are honest about what soft washing can and cannot do — it removes the organic staining and growth, but it does not repair physical damage or restore a roof that is simply at the end of its service life.
The problem it solves
Roof algae and moss are not just cosmetic. Moss holds water against the roof and works under shingles, and algae slowly degrades the surface. Clearing them protects the most expensive exterior system on your home — and removes the streaking that drags down the look of an otherwise pristine property.
Part of Year-Round Coverage
A roof wash is included in the deep-maintenance rotation under PROSPR Black, so growth is cleared on a schedule before it can take hold. For roofs we have sealed with Simix, the nano coat and ongoing coverage keep them performing far longer.
Explore PROSPR BlackRelated Services
- Roof Coating (Simix + ThermaCels)Ceramic Simix coating with ThermaCels for roofs, stucco, and decorative concrete — protection plus a thermal, reflective barrier.
- Gutter CleaningFull hand-clearing and flush of gutters and downspouts to protect your fascia, foundation, and roofline.
- House / Siding Soft WashLow-pressure soft washing that safely cleans siding and stucco and kills algae and mildew at the root.
