Hi! The website has been very helpful, but I need a little more specific help. I've built several coops in the past, but now I am living in a much colder area & have to re-think my previous designs. It will get over 100 degrees for a week or two in the summer, & overnight lows in winter can get 10 or more degrees below zero. I'm starting here with 8 Buff Orpington pullets, so they should be pretty winter-hardy. The henhouse & run (5' x 17') will be positioned between my unheated detatched garage & my neighbor's - 6 inches of clearance on each side to allow for some side ventilation of the henhouse. The garages have cinderblock foundations & will provide a mostly shaded area - the henhouse & most of the run will also be roofed. 1). Insulation - would you agree that we need it for such a cold climate? Is insulating the roof enough, or should the walls be done too? Mice could be a big problem - ideas? 2). What do you use for heating & cooling the henhouse? I'm thinking of a thermostat & greenhouse heater/fan - has anyone tried this? Is it worth the expense? If not, what do you use? 3). I've never used lights for wintertime laying (Barred Rocks have aways done me proud with winter laying) - does anyone know if the Buffs will need lights? (My impression is that they probably won't...) 4). I'm thinking that a concrete henhouse floor will probably work best to keep out rodents/snakes/wildlife (we have quite a bit!) & allow cleaning in the winter without having to use a hose. I'd leave the run floor as dirt. Any thoughts? Thank you so much for any input you can give us! We are clearing the area now & hope to start sinking posts/pouring the henhouse cement floor in the next couple of days. My husband wants me to hurry up & make up my mind on the details of the henhouse so we can get moving!