I moved earlier this year and went from a garage shop to a basement shop. Granted it is a slightly larger area about 21x40 and has double doors with a ramp so moving equipment in was not an issue. It was a big mess up until now because I had to dump everything from my shed in there too. I just finished building a shed and now starting to get my shop set back up, but 3 of the walls are just the concrete foundation. I have thought about framing this out and would put 1-1/2" foam first then 2x4 wall. Any thoughts on pros and con on doing this. One big con is I see is I would loose about 32 sq/ft. Any advice from other basement shop people?