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Full Version: Breather Material Between Wall and Polyiso
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Anyone considered using something like this cedar shingle underlayent - ( - between their outer wall and polyiso insulation? Seems it would allow air to move between wall and polyiso, thus avoiding trapping moisture.

100% unnecessary

Only time you could ever have that problem is with spray foam, or if you went to heroic efforts to (try to) create a 100% sealed vapor barrier.

Just make sure you ventilate the living space well at all times and you'll be fine.
^^^ Agree.

Allowing the interior to breath will avoid both the stale air smells and excess moisture.