Detached insulated garage with unvented roof assembly
Hello all. I’m detailing out a detached insulated garage with an unvented roof. Curious if this would be a place to use an interior barrier like intello-plus and possibly use mineral wool insulation? Not a fan of spray foams. Asphalt shingle roof, no overhangs, monopoly framed, sitting on existing un-insulated slab, unconditioned (I think). No RCP yet, so I’m not sure how many interior penetrations the architect will be asking for, but I do know they want either collar ties or rafter ties exposed with the ceiling vaulted. I’m assuming I’ll want a service cavity inboard of the interior barrier. In this assembly, any additional reasons to use one or the other, CDX vs OSB, for both the walls and/or the roof deck? Not sure what we’ll use for WRB or roof underlayment. Thanks for any insight and advise you may have.
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