Reflectix experiment: I have frost on my windows! D***. Yesterday in the coop was 34 at roost time. I'm thinking this was contributing factor. I'll open windows today as we'll have similar temps. Shoot shoot shoot.
I was thinking of using old server or computer fans to keep my coop cool in the summer. I suppose they would work to dry it out a bit during the day in the winter when the chickens weren't there.
Some of my plastic looks a little frosty once in a while. But the window is good so far. I figure that is ok.
I think the reflectix idea is a good one. Maybe just a little more ventilation?