Here's a frost bitten comb and wattles. Notice the tips are black, and there's almost a definite "barrier" between the healthy tissue and the damaged tissue. It's caused by moisture clinging to the comb during the tissue. The black is dead, and will fall off. The purple can still go either way...
Give me am hour or so
I'll show you frostbite combs (one of my boys already is pretty bad thanks to a water bowl incident) and a nor at all perfect coop that still works
Right now, what ever is easiest for you to do quickly to give them more coop room. If that's a basic hoop coop, or a pallet tractor, that doesn't matter. Just whatever you can do fast and good.