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So, how can the shingles be cleaned without causing damage to the roof?

April 26, 2017causing cleaned damage roof Shingles

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So, how can the shingles be cleaned without causing damage to the roof?

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By using the low pressure methods recommended by the shingle manufacturers themselves. The Asphalt Roofing Manufacturers Association, GAF, and Owens Corning have all suggested roof cleaning methods and solutions to clean Florida area roofs suffering from roof algae. They recommend using a low pressure chemical roof cleaning application followed by a low pressure rinse.