>> bees build burr comb on top of the frames in the 3/4" hollow space of the shim. OF COURSE THE BEES WILL DO THAT, if there is not ENOUGH drawn comb super space available! Gosh, the bees are trying hard to tell the beekeeper that they need MORE super space to deposit their nectar, or they might swarm! You know a little burr comb is not all that bad. And it does not nessicarily mean there is not enough space. I like to see a little bur comb at the top of my supers. It tells me that the entire super is full drawn and fully filled with honey. It is more efficient use of time and equipment extracting full boxes/frames of honey. But it means that extra space is needed, so I add another super, helps me gauge the flow and supers needed. I never seem to have enough supers for my hives Ian :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::