@oseiler Those hives look super nice! What have you got hanging down from the bottom? I would assume there is a metal mesh and then you seem to have a wooden cover on a hinge, right?
@raphadue not really - often when they make new comb on a bar they stick it to the sides (window or not) and I need to cut it off, but once done they tend to leave it as is. The windows aren't any better or worse that the wooden hive walls