Double stud wall with timber ceiling
I am designing and building a double-stud wall, single story house on a slab-on-grade foundation with a frost wall. As a dedicated timber framer, I have tried to hold on to some aspect of that approach while acknowledging that it adds cost and complications with air-sealing, etc. I devised a method where the outer wall supports the roof (cathedral) and the inner wall supports the ceiling assembly. My concerns are with the inner wall bearing the load from the floor to the edge of the slab. I have thought of putting a 2×12 plate under both walls to help bring the load to the frost wall and/or using an ICF frost wall. Any idea what the thermal penalty would be incurred by a full width bottom plate in cold, frosty (still!) northern VT? Also curious about how to best stiffen the inner wall…let-in diagonals perhaps?
Thank you for any advice!
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