Typically I like to start at the top,some people start at the bottom,imho when you start at the bottom you have more run-off. I start at the top so we can control run-off better.The John Blue pumps spray faster than we can walk. I spray until it starts running than I move to a different spot. I don't like to make the chemical run. A good technician and good surfactants go a long way.
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Mel Everett
Vero Under Pressure LLC
772-299-5949
Commercial and Residential
Low Pressure Roof Cleaning
www.verounderpressure.com
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