Insulating a beehive for winter
Bees seem to need our help more and more these days. They do not hibernate, but cluster together to create warmth, and subsequently create moisture by breathing. That can turn deadly unless there is a little ventilation. Therefore, there are openings top and bottom for ventilation and for bee flights on nice days. Traditional hive wraps are black roofing felt (tarpaper), or a black plastic covered fiberglass blanket “wrap,” or my current 1″ silver foil-faced rigid foam. I like the idea of 2″ foam (strapped like a box around the hive) but wonder what will happen in the elements. What I have seen is not foil faced, and I have concern about rain, freezing, etc. Evenness of temp fluctuations and gaining warmth from the sun are also worthy goals here. What would you suggest to insulate these hives for winter? Thanks!
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Brownew,
Somewhere on the web, there must be a forum for beekeepers. For your sake, I hope there is -- because that's where you should post your question.
It's true that 2 inches of rigid foam has a higher R-value than asphalt felt or 1 inch of rigid foam. But I have no idea whether that's good for the bees.
I also know that asphalt felt is a smart vapor retarder with variable vapor permeance -- unlike foil-faced foam.
In other words, there are lots of variables here, and lots of ways to screw things up. Bees are living creatures.
Good luck.
Thanks for the information, Martin. All information is helpful. Actually, we have many forums and resources for beekeepers. Like many specialty areas, with 3 beekeepers you often get 4 or 5 opinions, some of which contradict each other. I have found that consulting expert sources often provides a key component for understanding, such as your vapor explanation. Thank you for your response and your time.