I use screen bottom boards and an empty 4-6 inch tall box about the size of
a shallow super drilled with screened ventilation holes above the inner covers
 to keep out beetles and moths.  Have never experienced bee beards and the
summer temperature in Atlanta, GA frequently reaches between 90-100 F with
very high humidity.  Spraying the bees lightly with water will  usually put any
bees on the entrance back in the hive for moving  purposes.  I have several
hives with very large populations ( 1 produced in  excess of 200 lb) and the
empty box above really does a good job of ventilating  excess moisture during
spring buildup with hi/low temps and  moderates the hive temp in 90+ F summer
heat.  If empty  box is overrun with bees during nectar flow, usually means more
supers are  needed.

Jerry Wallace
Atlanta, GA

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