/ 20x20 Pole Barn Project #31
You know, I never even considered it. The barn could become my doghouse someday if my wife ever kicks me out, so that might not be a bad idea....
I saw 1/2" R-3 styrofoam sheet, which I could use without affecting the slab height too much, but would that make much difference? The thicker R-5 sheets wouldn't work without taking gravel out, and I'm not too keen to do that at this point.
That would work. Although I do prefer atleast a 1" thick rigid foam board for this. I know it would mean regrading but you can't wish it in later. I also prefer rigid foam to styrofoam. Once you work with both you will know why. And tape your joints.