We had a frame at our shop that was left behind by a renter, I strapped it out, sheathed the sides & back, wrapped it, then put a door in. Works well, but is very moist which I expected. Won't be good for glass work with the moisture, I just laid down 3 inches of gravel to try and mitigate it. But it was mostly built to contain the dirty work of grinding, sanding, cutting, etc.
It will be impossible to heat for any extended period of time here in Eastern Canada. I can do the temperature and moisture sentsative work inside the main shop.
