So were urban chicken owners, and dont want everyone to know were raising chickens. So were planning on building a Cluckenham palace (https://www.backyardchickens.com/web/viewblog.php?id=14375). So my issue is were living in Michigan. In the winter we get down to -20 at least once a month. What sort of inslatuion can we use in our coop to mantain heat in the winter but not overheat our chickens in the summer? In the winter our chicks will be moving into the garage, where its warmer (but not heated). Any advice?