Garage under bedroom
I have read the article by Lstiburek: BSI-009: New Light in Crawlspaces. Very informative!
Figure 7 shows a detail for Cavity Insulation with Vapor Barrier (see attached image below).
My question is this: Since the room is over a closed garage, I would like the fire rating of the garage ceiling to be at least one hour. My assumption is that this would be achieved using drywall in addition to foil-faced isocyanurate. If this is true, what would be the best way to layer these products. Or, do you have another suggestion. I am in Eastern TN that has cold winters and humid summers. Thanks in advance.
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