I have an external doorframe that I am closing up. I was wondering if I could use foamboard such as DOW SUPER TUFF R as the external sheathing. I do not plan on using osb or plywood in addition to this since the thickness would be more than the current sheathing.
From the studs to the outside: the layers would be stud, dow super tuff, tyvek, and hardboard siding.
from the inside, kraft faced insulation in the cavity and 1/2 inch gypsum.
Sounds good, as there is probably enough shear on each side of the door to pass inspection when initially built. Air seal the drywall: http://www.buildingscience.com/docum...wall-approach/
Tape seal the Tyvek seams, add sill sealer or two rows of caulking under the bottom plate.
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