Keeping algae off Atlas shingles: My quick hack

cyclist16 · 2026-01-20T10:31:27Z

If you’ve got Atlas shingles and live somewhere humid (I’m in Georgia, so yeah, algae is basically a neighbor), here’s something that’s worked for me: Scotchgard. I know, sounds like something for your couch, but the version for roofing actually helps keep those ugly black streaks away. I had my roof done two years ago with the Scotchgard protection, and honestly, it still looks way cleaner than my neighbor’s—he skipped it and now his roof looks like a science experiment. It wasn’t a huge upcharge either, which surprised me. I just made sure to ask the installer for the Scotchgard option when picking out my shingles. Not saying it’s magic or anything, but it does seem to slow down the grossness. Anyone else tried this or found other ways to keep algae at bay? I’ve heard copper strips work too, but haven’t tested that myself. Curious what’s working for folks in other climates.

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Tamko & Atlas Roofing Shingles

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Yeah, I hear you on the copper strips. I tried the zinc ones once since they’re a bit cheaper, but honestly, didn’t see much difference. The sprays just made my shingles look streaky and weird. At this point, I’m convinced the algae’s just part of the roof’s “character”...

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Keeping algae off Atlas shingles: My quick hack

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