Thanks to each who have responded.
By insulating, (I should have made clear) I mean more than wrapping with
roofing felt, which has much less than R-1 insulation value. I meant to
ask, has anyone had experience wintering colonies in R-4 to R-16 insulation
of some kind? Wood is R-1 per inch thickness. Polystyrene is about R-4
per inch. I am under the impression that bees don't get the shelter they
deserve in cold climates.
Cheers,
Kyle