How much cold can silkies take?

[mountaintopchicken]

I would really like to get some silkies to use as living incubators, but I live in a really cold climate. It's nothing for it to be below 20 F and stay that way forever, and for it to be below 0 with the wind chill.
Here's the weather we're talking about, only a little worse because of our exposed location. Can a silky take this kind of climate in a nice draft free coop, but with no added heat?

 

[AK Michelle]

My silkies are in a coop but the outdoor temps get to -35F. Inside the coop did get -3F, which made the girls all huddle together and rather unhappy

I added insulation and a lamp and now the coop is staying about 10 above

The silkies seem to be perfectly happy with anything above zero but they have elected not to go outside.

 

[Bantimna]

I would suggest that you put a heat source in rember silkies dont have close feathers like other breeds they have silk feathers that don't keep heat in or out.

 

[kees]

My silkies were pretty good until the temperature hit the teens. It was the summers that were really rough on them.

Suzy:/