I'm not familiar with these boards that absorb water that would normally soak up the condensation.  I've used a regular inner cover with a regular outer cover, and found a fair amount of condensed moisture between the two.  But since it was not raining on the bees, I didn't worry about it.
   
  More and more I've been converting to a notched inner cover with a 3/8" tall x 1" wide notch cut on the under side (toward the hive) of the inner cover and pretty much eliminated the moisture build up.  And my equipment is not all that "tight."
   
  I've seen beekeepers that use duct tape over all the gaps between boxes.  In MN I used to wrap my hives with roofing paper, but more and more, I'm becoming an advocate of increased winter ventilation.  It's the cold I'm worried about.
   
  Grant
  Jackson, MO



  
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