Does this wall assembly make sense?
I need some expert advice. Here is what I am considering for exterior walls:
siding (wood lap, LP, or fiber cement)
Furring strips (oc to match studs)
4″-8″ XPS or Polyiso foam
2×4 or 2×6 studs (16″ or 24″ oc)
1″-2″ closed-cell spray foam in cavities
Does this make sense for a cold/mixed climate (Omaha NE)? Is fiber cement to heavy for the furring strips? Is it worth fighting the battle with my local builder’s on going 24″ oc vs 16″ oc? With the exterior foam, do 2×6 studs make sense or are 2×4 studs a better choice because of less material? Is the spray foam necessary? Is this wall allowable by building codes?
I am posting this knowing that my assembly could very well be “full of holes”, but I will gladly swallow any pride in exchange for good advice. I really do appreciate people providing feedback. This site has been a tremendous resource for me.
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