> I live in southern coastal Maine (zone 5 if you garden) and have 6 or 
> 7 single 10 frame boxes that I am thinking of stacking with a double 
> screens between. Or instead of stacking putting them over stronger hives.
  I would advise not using the double screens between them. They don't 
need any additional moisture from below. I have good success in stacking 
singles on stronger colonies' inner covers, adding 2" foam above 
singles' inner cover, and wrapping the entire stack.
Mike

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