I am over-thinking insulating the pole barn now that we are getting some of the house stuff out of it. Metal skin, wood framing. Want to heat in the winter, likely just a big-ass fan or similar for summer use. Walls are 6" thick, my plan is to build out a 4" wall flush with the post fronts and use R-13 kraft faced batt in that. This will leave about 1.5"-2" to wall girts and then another 1.5" to metal skin. Question, should I install a vapor barrier/retarder on the face of the girts? From reading, keeping air from moving from cold to hot seems to be key to preventing condensation and that is what I am really worrying myself over. I don't want to trap moisture, or create a place for moisture to condense inside the wall assembly, but I want to stop air movement.
Do any of these look right?
Option 1:
Metal skin -- wall girts -- 6mil poly or tyvek -- air space -- R-13 -- wall covering
Option 2:
Metal skin -- wall girts -- air space -- R-13 -- wall covering
Option 3:
Metal skin -- wall girts -- air space -- R-13 -- 6mil poly -- wall covering
Other???
Do any of these look right?
Option 1:
Metal skin -- wall girts -- 6mil poly or tyvek -- air space -- R-13 -- wall covering
Option 2:
Metal skin -- wall girts -- air space -- R-13 -- wall covering
Option 3:
Metal skin -- wall girts -- air space -- R-13 -- 6mil poly -- wall covering
Other???