Quote:
Just food for thought: if you use a heat lamp, you will spend less and use less electricity if the coop is insulated. And if you don't use a heat lamp, it is not just the chickens' body heat that you want to retain, it is daytime heat in general, which can be nontrivial. Really it is not on winter DAYS that you're concerned about them being cold, it's winter NIGHTS, so better the coop holds its daytime warmth (relatively speaking) the less frigid it will get before the sun rises again. Honest.
So while you don't 'have' to insulate, especially if you want to run a lamp, there really ARE good practical benefits to be gained from it.
You might want to post a thread under the management section of the forum entitled something like "Anyone have bantams at -40F?" and see what info you can get?
Good luck, have fun,
Pat