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What's Causing Those Black Streaks on Your Roof?

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Those unsightly dark marks appearing on your roof aren't usually a sign of damage. Most commonly, they're the result of algae growth, specifically a type called Gloeocapsa magma. This substance thrives in moist https://mirrorbookmarks.com/story22125433/what-s-causing-those-black-streaks-on-your-roof

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