Those black streaks are alive
The dark stains on many roofs are a hardy algae (Gloeocapsa magma), often with moss or lichen mixed in. Blasting a roof with a pressure washer tears up the shingle granules that protect it. Soft washing applies a low-pressure cleaning solution that kills the growth and lets it rinse and weather away — the method roofing groups recommend.
- Removes black streaks & algae
- Treats moss & lichen
- Low pressure — shingle-safe
- Asphalt, metal & tile roofs
- Free, no-pressure quotes
