It gets pretty cold down there (I was using my IR temp gun down there yesterday and it was pretty cold even though it wasn't that cold outside.) Foam (I was thinking 2") has to be covered with drywall but apparently the whole assembly can't just be glued cause it could melt with a fire. What is the minimum needed to hold it on (supplementing the glue), goal being to minimize heat transmission. It's looking like a stud wall with maybe fiberglass is one way, but more material and I would think hassle, but would result in wall that things could be hung off of. I've looked at that Building Sciences site before. Sorry for nearly incomprehensible post.