What do you guys have done for doors? I bought extra blanket just in case so I have a lot left overto make a door with. I was thinking of sandwiching 3-4" of insulation inbetween two piece of SS, would that work? I'm going to have a wooden door made so I'll put that on the back side. I have anothe idea but I'll wait to see what you guys say, I wanna be able to keep as much heat inside as possible.