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09-06-2013, 01:32 PM #1
09-06-2013, 05:39 PM #2
Re: Duplex 1hr Separation Wall (Yes or No)
I won't go into elaborate detail, but taping & mudding at seams and mudding fasteners both layers both sides of stud separation wall is always a part of a one-hour assembly, exposed framing of the structural wall is never a part of same, stopping and blocking is always a part of same.
You made no mention of the roof structure, etc. Nor reference to your access to the attic area (perm. access ladder or scuttle) its protection/separation from living space, nor presence of mechanicals, etc.
Insulated separation wall as exterior wall quite impossible as you described as well.
2-family homes are not necessarily duplexes.