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Maxx ECO Wash About Us San Francisco Bay Area Request a FREE Quote! About Us: Maxx ECO Wash―San Francisco Bay Area's Roof Washing & Exterior Cleaning Contractor Maxx ECO Wash is a family-owned, CSLB Licensed Contractor (#1148003) specializing in professional low-pressure roof cleaning, soft wash roofing treatment, detergent-based house washing, exterior maintenance building cleaning, and pure water exterior window washing in the San Francisco Bay Area, CA.