The Science
Why Soft Wash (And Not Pressure Wash)
Pressure washing a roof is one of the worst things a homeowner can do. High-pressure water blasts away the protective granules on asphalt shingles, cracks clay tile, and dulls metal paint finishes. Most manufacturer warranties — GAF, Owens Corning, Eagle Tile, McElroy Metal — are voided by high-pressure cleaning.
Soft wash uses chemistry instead of force. Low-pressure (under 100 PSI) applies biodegradable cleaning solutions that kill Gloeocapsa magma — the black algae feeding on your shingles — at the molecular level. Algae dies, washes away in the next rain, doesn't come back for 3–5 years.
Soft wash is the ONLY method approved by:
- GAF (asphalt shingle manufacturer)
- Owens Corning (asphalt shingle manufacturer)
- ARMA — Asphalt Roofing Manufacturers Association
- RCIA — Roof Cleaning Institute of America
Sandbar Soft Wash is fully insured with 15+ years on Tampa Bay roofs — and warranty-safe soft wash is all we do.