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How long will it take for roof stains to disappear using the no rinse application method?

April 26, 2017application disappear method rinse roof stains

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How long will it take for roof stains to disappear using the no rinse application method?

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The stains will disappear in 6-9 months, on average, using 9 gallons water to one gallon of Spray & Forget mixture. A stronger concentration can be used to expedite the process. For example, a 5:1 mix will remove the stains in about 3-6 months on average. The removal time is also dependent on rainfall and the severity of the infestation.