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Old 11-18-2011, 12:52 PM   #1
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Foamboard sheathing

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.


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Old 11-18-2011, 11:48 PM   #2
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Sounds good, as there is probably enough shear on each side of the door to pass inspection when initially built. Air seal the drywall:
Tape seal the Tyvek seams, add sill sealer or two rows of caulking under the bottom plate.



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