Basement Perimeter Framing
I'm at the point in my basement remodel where I'm starting the framing (after nighmarish floor levelling!). My question is what is appropriate for a walk-out basement - let me explain further.
3 out of the 4 sides of my basement are half concrete foundation walls on the bottom half and wood stud framing on top (common for walk-out), but the walk-out wall that has the sliding glass door is completely wood stud framed from ceiling to floor (load-bearing wall with no above-ground foundation) with brick exterior on other side of studs and insulation.
For the half concrete foundating/half framed wall, I plan to simply build stud walls in front of the current foundation wall with a 1/2" gap (as seems to be common). However, for the fully framed current wall, what should i do?
It seems like a serious waste of space to build a new stud wall in front of this wall (losing 4.5" from the wall), but I also feel like I can't just drywall this as-is either (or could I?). I was thinking of maybe adding 1" or 2" of furring strips to the existing studs, put in a higher R-value insulation (thicker, like would go between 2x6s) and drywall over the furring strips (after electrical, etc.).
What do people do in a situaiton like this?! Is there any reason to add another studwall?
Thanks for any advice...