@George the original one - They dont come with much of any insulation, but with the right materials insulation is easy to add. Right now it has 1" plywood covering the floor and ceiling and nothing along the walls. Not that it needs any for its current use, but I would be adding insulation on all sides, especially on the roof (I'm in FL, the sun really bakes things). Right now it sits under the oaks on old bridge pilings we scavenged when the road crews were rebuilding our road. They were more than wiling to load them onto our trailer and let us drive off with them. Im thinking to use this one to learn on, and keep it at my parents for a "guest cottage" then take that experience into making what I really want.... When I have the time... after FI!