Hi Chevelier , welcome to BYC and the Michigan thread 

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Skip the insulation - as chickflick said, plenty of ventilation (up high) and no drafts that can blow on roosting birds is the most important thing.Alright Michigan friends, I have a question for you.
How do you prepare for winter?
Do you insulate your coop at all? What about temporarily walling off part of the run during winter?
I wrap my attached run with a clear tarp like this:Alright Michigan friends, I have a question for you.
How do you prepare for winter?
Do you insulate your coop at all? What about temporarily walling off part of the run during winter?
I don't have electricity in the coop. Water is in a vacuum-sealed, 3-quart bucket to keep it from freezing faster than 8 to 10 hours even when the temps drop below zero. But it is the same bucket that keeps the water cool in the summer.