So far no it's been pretty good. The garage door insulation kit made a pretty big difference. It was in the 30s the other morning outside and 60s in the garage outside of the box. I have a smith machine out of view and when I work out in there I'm in shorts and a t shirt and am comfortable. I do have a tarp though to throw over the top to keep heat from getting out more but I don't think I'll need that until the temps get into the single digits outside. I might move the pig blanket down below though, since summer has ended they do stay on the lower level more but before that they were almost always up top.
