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Black Streaks on Roof: What to Do About Them

10 min read
Black Streaks on Roof: What to Do About Them

Those dark streaks on your shingles usually come from Gloeocapsa magma, a blue-green algae—not dirt or old age. Here's how to handle it safely.

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The complete guide with detailed examples, photos, and recommendations is available on our main blog.

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