>
> Metal roofing does not fit airtight to a roof deck because it has ridges
> which give it strength and allow air to flow underneath it.
>
Yes, but plain air underneath is not "venting" and may not be enough in
volume, all depending on the size of covered area and the size and
position of openings.
still even if youŽd have a perfect vapor barrier, there may be
condensation as the metal can cool down significantly in clear nights.
yours, alex
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