It may be funny, but its 4000 gallons per 15 seconds, so it cleans in a real hurry. Not sure about the psi, but I'm guessing about 968.9 from 200 feet above the roof. Landscaping will lean toward flight direction, all concrete surfaces 'no charge' (built into the price of course)
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Ada Mobile Wash
2694 Ashville Dr. NE
Grand Rapids, MI 49525
616-285-8115
kennethpaul@vzw.blackberry.net
Roof Washing Exterior House Cleaning Grand Rapids, MI