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I overwintered 24 colonies on open mesh bottom boards with no stickey boards in and had one loss, and that was due to varroa immigration in November. My winter temps drop into the low 20s with highs in the high 40s or mid 50s, and the bees are as active on screen bottoms as they are on solid bottoms.

Both types of bottom boards work, what we see on the forums is influenced more by personal preference than by solid studies. Studies done on both types of bottom boards show that the bees survive just as well on one style as the do on the other, and they make as much honey on one style as they do the other.

Don't worry about your colony chilling, they will do fine.
 
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