I can see where a hive would freeze with ice on the inside. Condensation. I live where we have sustained winds over +35 mph with temperatures of -15 F for days on end. Even a proper vented hive can experience unusual drafts within the hive, swirling snow or high hive humidity.
My approach is more extreme perhaps. I have 10 frame Langstroth, that I wrap in 6 mm mylar backed bubble wrap, 2-deeps (+90 lbs stores), 1-small super filled with honey (+30 lbs), the pollen patty layer, and the sawdust quilt layer are placed inside a 2 inch rigid insulation box, with 2 inch annular space between the hive, and wrapped in black tar paper. The annular space between the hive and pink box is to shed condensation, or collect and freeze condensation in the proper environmental conditions. I have three vent points in the pink box, two bottom, one top. My hives are positioned that in the winter solstice, they can obtain 3.5 hours of direct daylight, with the entrance oriented true south.
I understand Finski's approach. My next test will be to put my bees in a man made cave without insulation for the winter. I have a river bank I can make into a cave (by bury a CONEX).
Lazy Mountain, AK