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Dealing with Algae on Your Roof

Dealing with Algae on Your Roof

Dark discolorations on asphalt shingles are common, and they can appear in blotches or in streaks. That’s algae, a particular kind of algae that spreads through airborne spores and often takes hold on shingles because of the moisture and calcium found there. Such algae won’t compromise your shingles physically, but it does ruin curbside appeal and often require the attention of a roofing professional.

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