Hindsight is 20-20.. I have a post frame building that was built in 2003 on a concrete slab. Looking to create an "office" inside that will be heated/air conditioned If i knew then what i know now i would have had Tyvek and foam put on the exterior before the steel went on, but that is not the case...
Soooo my plan is to install rigid XPS foam on the inside of the exterior wall, then frame next to that and fill wall cavity with R19, cover with Visqueen vapor barrier and then/drywall
My question is do i place the and seal the rigid foam between the 2x6 girts, or put them on top of the girts then build my conventional wall system? Either way there will be an air space between the exterior wall and conventional wall system.
Spray foam is not an option....
Thanks..