Quote:
Originally Posted by upthesaukee
I am having a new roof put on starting tomorrow. Old roof had mega moss, looked like a forest floor.
Roofer said zinc strips would help, rain water hits the zinc, washes down the roof and kills the moss.
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Most new shingles have "algae-inhibiting granules" to prevent growth, see:
http://www.iko.com/shared/residentia...30AR-EngFr.pdf
They are granules of either copper or zinc; make sure the new shingles are so treated.