<<I think top ventilation is the most important thing.>>
So Michael, if I put a piece of R16 wrapped in plastic bags in the roof like another utube video taught me, there will be no ventilation there correct? Maybe small screened in hole(s) under the bars and behind the fowler board and feeder? I heard leave 2 holes open. 1 on top for the workers and 1 on the bottom for the drones to get out. Maybe 1 top and bottom to match those. The drones are gone soon enough. I can shut them right off then having only one on top? I may be way off on this also. If I am please forgive me.
Hive #1 has only a slit on the bottom in the end. I am putting a mouse guard on that which gives me the same ventilation problem.