Mixed roof insulation methods
We are building a home near Ann Arbor, MI and would like some advice on how to approach a specific portion of our building section.
The majority of the home will have R60 blown in cellulose (blue areas) with Intello Plus underneath. The vaulted (red) area will be R60 closed cell foam. The walls will be EIFS, 2x6 R20 Roxul with 4" EPS exterior foam.
Our concern is the clerestory wall (green and purple).
We will continue the EIFS on the exterior portion of the wall (green), but are a little unsure what to do on the vented ceiling/interior wall (purple) section.
We were thinking closed cell spray foam this area inside the attic and do Roxul on the interior. The IntelloPlus would then be tied into the spray foam to seal the whole section.
The other area of concern was the top of the clerestory wall where the closed cell spray (red) and the EIFS (green) come together. We don't want to trap the sheathing between the closed cell foam and the rigid foam. Could someone make a recommendation?
Eric & Ryann
Posted Jan 11, 2017 8:18 AM ET
Edited Jan 11, 2017 9:29 AM ET
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