Breather Material Between Wall and Polyiso

[Kevin H]

Anyone considered using something like this cedar shingle underlayent - (http://www.benjaminobdyke.com/products/cedar-breather-ventilated-underlayment/) - between their outer wall and polyiso insulation? Seems it would allow air to move between wall and polyiso, thus avoiding trapping moisture.

Thoughts????

 

[John61CT]

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.

 

[Matlock]

^^^ Agree.

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