Having been told several times by You Lot that our hives’ walls are too thin, we have made some wooden panels to clad the outside of the hives, painted them up and attached them thus-and-so:
I did wonder if the large black and yellow power screwdriver would be attacked as a wasp when it began vibrating the hive, but everyone was too happy in the sunshine to bother about it.
Measuring up and tweaking the panels was easy because we have an empty hive of the same make.
One tip: the panels, formed from simple tongue-and-groove lumber from a hardware shops glued together, were attached with 4 screws each. I originally chose screws which were just long enough that they wouldn’t quite penetrate the double layer of wood: I assumed the panels would lie flat against the hive wall. But, it turned out the hive has distorted quite a bit in the last two years: even if it were unseasoned wood it’s had a warm moist nest on one side all that time, and warped a bit. So I needed considerably longer screws than I’d expected.