You're site is full of very useful information and much appreciated, so I know it's me but I get more confused on what I need the more I try to study it.
We have a 26x40 pole building with steel roof and siding that we want to turn into a conditioned space year around. We will have a vented attic and 12' tall walls. We plan on using hemp batt insulation in the walls and attic floor (ceiling of living space).
We live in Iowa in a county that has no code because we won't be living in this space.
I'm confused if I need a radiant, vapor or air barrier or all three.
Any guidance or help is very much appreciated!