Mike Lamb Posted July 8, 2020 Report Share Posted July 8, 2020 What do you think would cause the black streaking on this roof cover? It reminds me of black algae on the north side of the shingles roof but I don't think I've seen this before. The roof was in good condition and I would estimate around 10 years old or so. Quote Link to comment Share on other sites More sharing options...
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