I was out in my coop yesterday and noticed there are no drafts but it's **** cold! We've been dropping into single digits over night, with 20s for the highs during the day. The coop was here when we bought the house so it's not my design or anything. The boards are barebacked, and I was wondering if I could use cardboard as a makeshift insulation until it's warm enough to get out there and work on the coop. (Yes, I'm a total ninny when it comes to cold, icy, snowy weather) Has anyone tried cardboard as insulation?