I'm new to Seramas this year, too, and my coop is uninsulated and unheated, so the plan is to bring them inside when the temperature out starts to reach freezing - so pretty soon. (I have a spare room I brood chicks in, so they'll go in there for the winter.)
I'd like to say you could probably rig a heat lamp or something in the coop and they'd be ok, but I'd hate to make assumptions that are incorrect..
I'd like to say you could probably rig a heat lamp or something in the coop and they'd be ok, but I'd hate to make assumptions that are incorrect..