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<div class="moz-cite-prefix">Indeed.<br>
Or to understand more about Vapor Profiles & Vapor Barriers
and Vapor Retarders and which/where you want to use them, see
buildingscience.com<br>
search for <br>
Understanding_Drainage_Planes.pdf<br>
Understanding_Air_Barriers.pdf<br>
Understanding_Vapor_Barriers.pdf<br>
Understanding_Attic_Ventilation.pdf<br>
<br>
There's an awful lot of good information on this site.<br>
It's not rocket science, but is IS science.<br>
<br>
Joe<br>
<br>
On 3/17/2016 4:43 AM, Matt Dirksen wrote:<br>
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<div>Has the architect done a vapor profile to confirm that adding
the foam won't raise the risk of vapor hitting its dew point
inside the wall? It would sure suck if rotting occurred
somewhere in the assembly, due to adding the foam. Due to
hygrothermic analysis, it ain't just about R-value any more.</div>
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<div>Matt</div>
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