I have a couple of questions. Im planning on converting our lean to into a coop. Its metal siding on 2 sides, 1 side is obviously the old barn, and then as you can see an open side. Im trying to do this coop with as much salvageable stuff or as cheap as I can. I was planning to put plywood over the metal siding. Should I insulate in between? I have a large piece of carpet in my garage I was thinking about using for insulation between the plywood & metal siding. I dont want to encourage mice to nest in the walls either though. Im planning to build the lean to to stand alone so when we either tear down the barn or restore it, we wont have to bother the coop. I was thinking of using OSB to side the wall against the barn for now and then use smart siding for the front/ open side. Do you see any major flaws with my plans?