Sealed attic with vented roof?
I am currently finishing of an unfinished space above our garage and master bed room. I want to get the areas and efficient as possible and am doing all the air sealing and insulation myself. We are using Mitsubishi mini splits as well. I am also using all stone wool insulation. My question is, would adding foam board above the insulation and sealing all seams be beneficial or more work than it’s worth? In other words a sealed attic space, unconditioned, with a ventilated roofline. A sealed unconditioned space above ceiling insulation I have attached pics to show what I am referring to. Any advice would be appreciated.
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