>>Make a hive which have ALL sides made from mesh
>>(screen), also bottom and top.

> They can't fit their heads through 8-mesh, so they filled
> up the "cracks".
>
Anybody remember the hive covers that were sold -Oh, about 50
years ago-   They had glass fiber insulation with a wire mesh
toward the bees. Several holes (abt quarter inch) in the rim,
slanted down to keep moisture out, and to vent.
Bees "filled up the cracks." I took the insulation and mesh out
and used them for a while.

Leland Hubbell