Thanks guys, I have silkies so yes they have a harder time insulating themself with their fur like feathering but I read they are still hardy in winter and should be ok. I just keep getting such mixed messages from ppl who say they still need heat, and that they tried it without and there birds got sick with colds or died. If I still have my chicks come winter then i'll be very attached to them and if I loose any i'll be very sad. I will bring their coop inside our little barn also and that will eliminate any snow/rain collecting on the coop, and any wind yet its still very open so it will be ventilated still. I want to do whatever is best for them. It would be nice not to worry about a fire or anything out there by adding a lamp. I'll add a heater for the water though. And no I dont care about eggs so much in winter. I think it would be a nice break for them to not have to lay any. I just want to make sure they are warm and happy and that none of them will freeze to death.
Your profile doesn't say where you live (I see Utah in a prior post, add it to your profile so people won't keep asking
). If you got them as day olds a week ago, yes, they will need heat and a LOT more heat than even those that THINK they need to heat their coops would provide. But that is a different matter, it is called a brooder
I presume you've already got this covered or they would be dead by now. If they are already fully feathered babies (like ~4 weeks old) they shouldn't need heat but you could give them access to heat for a while since they aren't acclimating from warm summer through fall into winter but from hot brooder temps into fall temps.
If you are concerned, I suggest you NOT put heat in the coop but create a somewhat enclosed space (to keep the heat in) in the run where you can put a heat lamp. Turn it on when it is cold and see if the birds hang out there. If Silkies are not sufficiently self insulating for 0F in the winter (I have no idea, I have no Silkies), they will go to the heat. But I propose you have a place to hang up the unused heat lamp when you find out the birds not only don't go to it but stay away from it. You are more likely to get sick birds by over insulating and heating without proper ventilation than letting them take care of themselves in a ventilated but NOT DRAFTY unheated coop.
Another thought regarding insulation and vapor barriers. The purpose of a vapor barrier is to keep the water vapor from getting into the insulation (fiberglass, there is foam insulation that is not be damaged by moisture and IS a vapor barrier). What you WANT for your chickens is for the water vapor to
GET OUT OF THE COOP. I can't think of a better way to damage the birds' health than to have a high humidity problem in the winter.
I'm sure there are Silkie threads in the forums on BYC, maybe you can find out just how cold tolerant they are in one of them.
Bruce