Insulation and Vapor Membrane for a Conditioned Attic
I’m in the process of plans on a 900 sqr foot ADU (small house) in Southern California. The roof is going to be a simple shed roof. The only equipment in the attic is going to be a ducted mini-split air handler. The space between the ceiling joists and the rafters the top end of the roof is just under 5′.
The plan is make the attic part of the conditioned space. We’d like to use fiberglass batts or Rockwool for the insulation. The rafters will be at least 10″. I suppose I could leave a channel behind them and the roof?
Also, considering adding a strip of vapor permeable membrane near the high side of the roof to cover a 4″gap across the width of the roof in the sheathing.
Looking for any insight from you great folks. Also is it better to go with the Rockwool?
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