Hive insulation

[Erichalfbee]

I make my roofs deep enough to accommodate 50mm PIr insulation, left in place year round. If I judge hives could be too hot, bees bearding or fanning entrances, in summer then I place 1/4 inch strips on top of disc vented crownboard

I've seen that in the poly hives with solid UFE floors. I lift the brood box off the floor in a similar way, rather than the crown board