Metal strips on roof

[tgreenwald (Tom Greenwald)]

I found metal strips along the top of the roof. It is not flashing. Its about 2 inches wide. I have never seen this before. Is there a reason.

[tglaze (Thomas Glaze)]

Zinc strips that help deter moss growth.
https://www.homearchitects.com/zinc-strips-on-your-roof-keep-it-looking-new

[rlewis5 (Roy Lewis, CERTIFIED MASTER INSPECTOR RETIRED)]

If it is zinc it is for fungi control.

[tgreenwald (Tom Greenwald)]

I see…They sure could use a LOT MORE. There was a lot of moss in many of the areas with out them.

Thanks for your guys help.

[jjonas (Jeffrey Jonas)]

Master Flow 2.67 in. x 50 ft. Zinc Moss and Mildew Preventer Strip-NMM50 -...

[acunningham2 (Alan Cunningham, TREC# 22302)]

Sounds like a gimmick to charge more for the install!

[tglaze (Thomas Glaze)]

Sort of like “gutter guards” ? Does it, or does it not work?

[bcawhern1 (Brian Cawhern, CMI)]

https://www.homearchitects.com/zinc-strips-on-your-roof-keep-it-looking-new