>You've missed the point. What works well one year may have the opposite result the next year. What works here may not work there. To me, the only information of value is what works here the most reliably.

I do believe I understand the sentiment. The problem is, I am not aware of any studies that suggest what works one year won't work the next in terms of cavity resistance- what data we do have appear to suggest is confers a net benefit across a wide range of climates.

And as to what works- in my home yard I have a mix of standard Langstroths, polys, thick-walled Warres and even a few Apimayes - and they all work.

The question at hand is not whether one can successfully overwinter in uninsulated cavities in temperate climates or not.

The question is- does insulation reduce clustering- and does this (repeatably) afford a measurable benefit in overwintering compared to the alternative?

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