As I make my own telescoping covers, I started making them so as to
incorporate 1" of the blue foam. After a very short trial period I
discovered the bees love to "disturb" the material. I had on hand a thin
plywood of about 1/8" thick. I fit and glued this material in place. With my
limited experience handling bees, I can't say how this might affect the
survivability and health of the winter cluster. I just thought it might be a
good idea.
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