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Answers from contractors near Columbus, OH

black spots on the roof. can you tell me what is the cause of this? have lived in this house 12 years and have had no problems. what can you do to clean this?
Oct 13, 2014
Using the information you have provided and not visually inspecting the roof, the black spots on your roof are more than likely algae.  Most shingle manufacturers use copper or zinc coated granules t ... read more
Last edited Oct 13, 2014 3:27pm

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