Sounds like you have a good starting point with a wooden 6x8. Your breeds should be fine in winter.
Insulating is really not necessary but a personal choice. I am in NJ and do not in-sulate. Just make sure the coop is as draft free as you can. Small seams are OK. The important thing is keeping drinking water from freezing.
Insulating is really not necessary but a personal choice. I am in NJ and do not in-sulate. Just make sure the coop is as draft free as you can. Small seams are OK. The important thing is keeping drinking water from freezing.