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Can I put plastic between the insulation and finish wall in a new garage? Or would we gain anything by doing this?

We have some who told us to do this and others who say definitely do not.

There is already a weather protection sheet between the outer wall and the vinyl siding.

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It depends on your climate. Where are you at? – DMoore Aug 24 '13 at 19:26
Why do you want to? – wallyk Aug 24 '13 at 19:58
Is the space heated? – mikes Aug 24 '13 at 21:24
What kind of insulation do you have? – Niall C. Aug 25 '13 at 4:03

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