Lloyd Spear says concerning screened btm boards::
>I don't know about "everyone", but I leave them on all year, and
>personally know of two others who do likewise. Between us, many hundreds
>of hives are so involved (I have 75). With temperatures of -20F, and
>sometimes snow completely covering the hives, there is no noticeable
>damage. All hives have generous upper entrances.
Lloyd, don't you also wedge the inner cover so that the front has a 3/8"
opening so that air flows through the hive? I remember you demonstrating
this system at the Beekeeping Seminar held last March in Beaver, PA.
Jim
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