ICFs and a walk-out basement
As I am firming up my design, we will have a walk-out basement. The plan is to use an ICF basement, with 12″ double stud walls for the upper part of the house.
My original thought was to do the ICFs on the 3 “below grade” sides, and then change to the double stud wall on the walk-out side to save cost and make for easier construction of windows, doors, etc. (plus if a RO gets framed wrong or something changes, we are fixing wood and not concrete…).
Besides that, the other reason is it is a long (60′) exposed wall on the north face. I was thinking the r-40+ double stud would be a much better option then the r-25ish ICF wall.
Are there any thoughts on this? Would it still make a better/stronger basement ‘system’ if all the walls were ICF? I realize the length is quite long, which is why I am curious if it would even help make any difference or not.