This has been discussed a little here but I am curious of the heating/cooling costs associated with heating a metal sided building with closed cell foam vs other insulation tyes, i.e foil or vinyl sided fiberglass. I decided againsted open cell insulation. The price diffence between the closed cell foam and fiberglass as we all know is substantial.
I have a 30x40 with 12ft walls I built ten years ago to store farm equipment and a long since gone boat. At the time I built it I decided not to insulate or put in a concrete floor. Now I am considering putting in a floor and turning the building into a shop. I have quotes of putting in 1 to 2 inches of close cell foam but I'm curious what it would actually cost me to heat the building. Ideally I would keep it between 50-60 most of the time. I haven't decided on the heating/cooling system yet either. It would not take much for me to dig a line for natural gas or I could go with electric unit.
Any thoughts?