Re: Did I do this right? - Winterization West Central IL
I'd remove the piece of wood and screen the hole with 1/8 so bees can not get to the styrofoam. Any condensation above the bees would be on the underside of the styrofoam and mostly drip onto the top side of the inner cover. Also add a popsicle width opening between shallow and inner cover so get some ventilation of any moisture out the small opening. Should raise the styroam off the inner cover by adding a strip of min 3/8 blocking.
Close off the screen bottom board.
Alternately, leave the inner cover hole open and cut cut a piece of plywood to protect the styrofaom from the bees. The piece of plywood is better in that it absorbs some moisture before any condensation drips. Raise it up from the inner cover by min of 3/8 and vent the back between shallow and and inner cover with a pop sicle width. Vent moisture to prevent dripping and any mold. Close off screen bottom.
I use 1 inch bottom entrance which is 1/2 by 3/8 on each side and 1 1/2 top notch in inner cover. A seasoned beekeep from my climate recommended a single 5/8 bottom entrance. I also have a 2 1/2 inch deep feeder rim above the top deep and have a 3/4 round hole in front of it.
Ventilation required is a regional thing and depends on bee population(give off moisture from metabalism) and humidity of the air. Check what other area beekeeps do for top and bottom opening size. Monitor your hive and adjust openings wider if condensation and mold become problems.
Zone 3b. If you always do what you always did, you'll always get what you always got!