- Aug 16, 2023
- Reaction score
2.5" thick rigid styrofoam insulation. I make panels and screw them to the outside of my hives. The hives are homebuilt, not meant to move and are made of 2.5" thick lumber. I put a 10" deep box on the top and fill it with styrofoam insulation and then a down pillow, so I have 10" of upper insulation.
The bees do great even in -40C, they come thru the winter with strong clusters.
I would be hesitant to use a heater in my hives, IMO when the outside temps. are very cold and the bees are unable to go out for cleansing flights for months at a time, a too warm interior allows them to consume more stores. This increases their need to defecate which they will not be able to do in our cold climate. A tight cluster is desirable in winter IMHO.
Your calculations out there makes no sense.
Polystyre hives have 4 cm thick wall.
20 years ago the poly wall was 2 cm in Nacca hive Sweden.
I think that you have never seen -40C in Britain. Such temps are very rare in Finland.