The manufacturer-approved way to clean a roof: low pressure, smart chemistry, zero damage. Soft washing kills moss, algae, and lichen at the root — a pressure washer just blasts the surface and takes your shingle granules with it.
Soft washing uses water pressure similar to a garden hose combined with biodegradable cleaning agents. The solution does the work — breaking down moss, algae, and lichen and killing them at the root — instead of brute-force water pressure tearing growth (and shingle coating) off the roof.
Every major shingle manufacturer specifies low-pressure cleaning. The Asphalt Roofing Manufacturers Association warns against high-pressure washing because it strips protective granules, shortens roof life, and can void your warranty. When a company proposes pressure washing your asphalt roof, that's your cue to call someone else.
| Soft Washing (what we do) | Pressure Washing | |
|---|---|---|
| Water pressure | Garden-hose level | 1,500–3,000+ PSI |
| Shingle granules | ✓ Stay intact | ✗ Stripped off |
| Manufacturer warranty | ✓ Stays valid | ✗ Often voided |
| Kills growth at root | ✓ Yes — chemical action | ✗ Surface removal only |
| Regrowth speed | Slow — roots are dead | Fast — roots remain |
Free inspection. Soft wash only. Prevention included.
📞 Call (206) 555-0199