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Keeping algae off Atlas shingles: My quick hack

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(@kennethsummit184)
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I get where you're coming from, but I'd push back a little on the idea that coatings are just a temporary fix. If you prep the shingles right—gentle wash, let them dry, then apply a quality algaecide sealant—it can actually buy you more time between cleanings. I’ve seen some homes go four or five years without major streaks after a proper treatment. It’s not magic, especially under heavy shade, but it’s less work than hauling out the ladder every spring. Just gotta be careful with runoff and pick something that won’t mess with your landscaping.


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