New detached garage! – Questions on insulation plan
Finally built my detached garage (48×30)and working on the insulation plan. It will be drywalled and HVAC at some point. The trusses are on 19.2″ centers. The room trusses (32ft long) have a 2′ raised heel to give me a 10ft. ceiling on that side of the garage, while maintaining a 12ft wall for the scissor truss bay for a 10k car lift. The walls are 2×6. There is a pull down stairs to access the attic space from inside and there will be an outside staircase built for a gable end door eventually.
My initial thought is to us 1×2’s and attach them to the sides of the truss right under the deck and then use OSB, polyisio or something else to give me a air 1.5″ air channel from soffit to ridge vent. I would use caulking (polyurenthane?) to seal all the edges. Then use rock wool or pink to fill the cavities. I am in Richmond, VA (Zone 4).
For HVAC, I was thinking 2 mini-splits downstairs, but then the attic room would be unaccounted for. Wondering if a regular heat pump with traditional ductwork would be better?
Any thoughts or advice?
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