We built our coop in the spring and used some fencing we found at a great price. Although the boards were really close when we built it, apparently as they have dried out over the summer, there are some pretty big gaps between the boards. Not big enough for predators, but I worry about drafts with winter coming. We are in NC where temps will definitely fall into the 20's or 30's and stay there for a few weeks at a time. I was thinking of using corrugated plastic to line the inside walls of the coop. It would block the wind - and I can get a whole bunch free since most of these election signs are made of it and after Nov. they will be thrown away... What do you think? Do I need to fix the gaps or will my girls be ok? Will the plastic work? Here are a few pictures showing the gaps between the boards. I do have windows that swing shut to block the big holes.