Black Streaks on Your Roof? Here's What They Are
Published on: 20/04/2026
Those dark stains on your roof aren't just dirt -- they're algae eating your shingles. Learn what causes black streaks and the only safe way to remove them.
Pressure washing

Those dark stains on your roof aren't just dirt -- they're algae eating your shingles. Learn what causes black streaks and the only safe way to remove them.

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Not sure whether you need soft washing or pressure washing? Learn which method is right for your home's siding, roof, and concrete -- and why it matters.

Those dark stains on your roof aren't just dirt -- they're algae eating your shingles. Learn what causes black streaks and the only safe way to remove them.