Polyiso and ZIP
We are looking to build next year, and have to build with a certain builder, wife wants a certain subdivision. We are in Prince Edward Island, Can. on the border of Cold/Very Cold zones probably around 4500 HDD. They will build with 1″ foam on exterior. I’m looking to maybe consider ZIP sheathing with hopefully 3″ polyiso (1.5″ over 1.5″) over top then blown-in in 2×6 wall. Will the ZIP system plus ridgid foam allow me to not have interior vapor barrier. Any ideas to help steer this ship.
Thanks in advance, Marty
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