Insulating the roof deck with both closed-cell and open-cell foam?
I am consulting on a home where the HO wants to have the insulation at the roof deck. They are thinking 2” of closed cell followed by 6” of open cell.
The HO put forward this idea.
2" closed cell at the roof first to provide the vapor barrier then followed by 6" of open cell which will be enough to encapsulate the top chord of the roof truss and minimize thermal conduction.
Does anyone have any experience with this type system?
Is there any concern of the two layers of foam de-bonding from one another?
Posted Sat, 03/29/2014 - 14:12
Edited Sun, 03/30/2014 - 06:07
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