Metal Building

[Ramper]

I have the Prodex (I bought it before I found this place) and am looking at buying some 2" foam boards from CL. Should I just cut the foam to fit place it up next to the metal and then leave a gap and install the Prodex? I live in MN and would like to heat and maybe cool the building. The building is 30 x 40

 

[Ramper]

I can get 2" foam (beadboard) for $500 - 600 to have enough for all the walls and the ceiling. My thought is foam up against the outside metal, then an air space, then the prodex and then the interior metal (I plan to use it instead of OSB) or spacers and then osb

 

[green.bubbly]

Does the foam board have a radiant barrier on one side? The stuff I am using does and for full R value, you are supposed to leave about a one inch gap.

I could be wrong but the power of the Prodex is its ability to reflect radiant heat. It would seem logical to me to put that first against the outside metal to reflect the radiant heat and then the foam board but I never used the stuff.