My boyfriend and I have been talking about what to do when we build our chicken coop and I've been trying to research online what we'd need to do to make sure that we have a solid coop, so either a shed we build ourselves or a shed or baby barn we buy and convert. What concerned us though, was that either we we build it, we were wondering if we'd have to add some insulation. I was thinking perhaps a sheet of foam insulation all around (except the ceiling and perhaps the floor), as we don't think a sheet of plywood would be enough for the cold Canadian winters where a -10c or 14f is considered a warmish day in January/February/March. I know a lot of people say you don't need it, but I just wonder if I need to because as I said earlier, I'll be getting a decent sized coop for perhaps a dozen chickens, as I want to be able to get inside the coop to clean, and I'd like to have enough space for them to do their thing on days when I can't let them out during blizzard or thunderstorm conditions. Any tips would be appreciated!