A quick fix is to make a crude rectangle from insulation - Kingspan , Celetox and cover the hive body - with a hole for the entrance.. And a layer under the roof. one 2 meter length will easily do a hive. (or two)
Cuts easily by hand with a knife, gaffer tape and away you go.. Pre-assemble in warm, roof off, cylinder on, insulate other roof in warm and swap roof.. 2 minute job.
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