Growing up in Maine where it stays -25 to -30 from about Dec to March I can tell ya we never put a light or a heater in the chicken coop. It was not insulated either. The chickens body heat was enough to keep them warm. In the winter we had roughly about 30 to 40 birds in an 8X10 coop. We had mostly Australorps, Sussex, RIR and Light Brahmas with a few misc breeds thrown in for uniqueness. We kept the water and feed inside the coop and rarely had to break it up from the cold just because again the body heat from the hens being in the coop was enough to keep the water warm enough not to freeze.
I think Ron's idea with the sun roof is pretty ingenious as it allows the heat from the sun to get in there during the winter time and will help during the summer time with drying out the wetness that builds up from lack of sun light to dry it out. Pure genius.
I agree with Sunny though, there are a ton of different theories out there. I am not worried about the cold weather as much as I am about the heat.
I know how to deal with the cold weather but I am concerned that during the summer it is going to get super hot in that coop. Do any of you put a fan in your coop during the summer?
Of course I would need a coop to be worried about to start with...
I think Ron's idea with the sun roof is pretty ingenious as it allows the heat from the sun to get in there during the winter time and will help during the summer time with drying out the wetness that builds up from lack of sun light to dry it out. Pure genius.
I agree with Sunny though, there are a ton of different theories out there. I am not worried about the cold weather as much as I am about the heat.

Of course I would need a coop to be worried about to start with...
