Frank asks "I am looking seriously at using screened bottom boards starting next year.
I have read here in the past that 6 mesh is the perfect size, but that it is
hard to find.  I understand that 1/4" and 1/8" mesh are easier to find, but
1/4" will not keep out the wasps."

I would not use 1/4", but not because of wasps.  Honey bees can readily pass through 1/4 inch.  Sooner or later you will want to move the hive with the bottom screen on, and doing so with 1/4" would not be pleasant!  You are correct, 6 mesh is very hard to find.  However, 7 mesh is available from several dealers including Betterbee (800-632-3379).  I also sell 7 mesh, but only in full rolls (36" X 100').  While I always have 7 mesh around (I use it to build the Sundance pollen traps), I use 8 mesh (1/8") for screened boards just because it is less expensive.  I "think" it works fine, but undoubtely 7 mesh would be better.


Lloyd
Lloyd Spear, Owner of Ross Rounds, Inc.
Manufacturer of round comb honey equipment and Sundance pollen traps