Insulation in 2x4 walls
Wondering if i can buffer the insulated interior walls by puting 2 inch xps on the exterior.
Currently i am down to the studs, 2x4 as mentioned, and was thinking sound proofing batts (higher r value) on the inside with the xps on the exterior. The sheathing is shiplap board.
I was concerened this would hold the mosture in.
Short of that i thought i could add 2 inch strips to the 2x4 to makeshift 2x6 but would not prefer it as the interior is small enough.
What the options are there for 2x4?