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What's Causing Those Black Streaks on Your Roof?

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Those unsightly shadowy lines appearing on your roof aren't always a sign of problems. Most frequently, they're the result of algae growth, specifically a type called dark-colored algae. This fungus thrives in humid https://royalbookmarking.com/story22186737/what-s-causing-those-black-streaks-on-your-roof

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