Nice pictures!
My main concern is the fiberglass insulation on the steel?
Will the insulation have mositure and mildew issues since it it contacting the steel?
That's how I did my shed, but it's not fully heated yet.
The idea here, looking from the top down is:
/\/\/\/\/\/\/\/\/\/\/ outside tin
============== outside horizontal purlin 1.5" (A)
[] .............. [] 6x6 posts (5.5") with bats (..) between them
------------------ vapor barrior
============== inside horizontal "purlin" or "stringer" 1.5" (B)
xxxxxxxxxxxxxxxxxx osb or tin (inside wall covering)
So clearly on the inside the bats only contact the vapor barrier.
On the outside, there is a theoretical 1.5" gap between the posts and the outside tin because of the outside horizontal purlin (A). So the bats may touch the tin in places, but in general there is an air gap there where air can circulate, so the condensation that forms on the tin won't be pressed tightly to the bats, and the air can dry it out.
I did it this way because I checked out how someone else's shop in the area did it and they had the builder do it (a big name, FBI,Morton,or Cleary), so I figure that's a proper way to go.
The R19 fiberglass is ~6"+ and you're fitting it in a 5.5+1.5=7" cavity between the vapor barrier and tin. So it does work out about right and as I installed it it all seemed to fit.
