I define the inner envelope of my tiny house as everything between the Zip panel (with its own vapor barrier) and the inner siding.
Walls: Total R Value 18
For rigidity of the structure, in the corners and key areas (about 20% of the entire structure) of my advanced framing, I placed a combo of 1 inch Owens Corning Foamular 250 (R Value 5) and 2 inch Bonded Logic recycled cotton jean insulation (R value 8). The last .5 inch is an air layer between the layer of stapled Ecofoil radiant barrier and my interior walls.
In all remaining walls I have 3.5 inch of Bonded Logic (R value 13) slightly pressed in with stapled Ecofoil and .5 inch airspace.
Dormer and Cathedral Ceiling: Total R Value 18
I have 3.5 inch of Bonded Logic (R value 13) slightly pressed in with stapled Ecofoil and .5 inch airspace.
Floor: Total R Value 33
Two layers of 1.5 inch Owens Corning (R Value 15), 3.5 inch Bonded Logic (R Value 13) and Ecofoil (R Value 5).
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