I admit I did not read all the posts, but back in Missouri where there are millions of "pole buildings", they will use a very thin vapor barrier material before putting down the roof ( under the roo I a trying to say). Thats great if you are putting up a new building!!
That's the material the metal building supplier offers. The sales rep that I went through told me that its not the best, and if I were to go that route, buy it myself and not through the company since it would be cheaper.
