>>I don't provide an upper entrance, but I've been considering it...drilling a hole near the top of the box. Is it because you've seen condensation and would like to bring the moisture out? >>I winter my nucs on top of production colonies... Do you place 2 nucs, side by side, over a full size colony? (One could cover both nucs with a single [oversized] cover.) >>I do top insulate with foam...directly on the nuc's inner cover(which is a grain bag)... Do you use a grain bag to absorb moisture? Doesn't a grain bag sit directly on the top bars preventing bees from crossing over the frame tops? Waldemar -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---