Well here is a tidbit. I'm helping a new beekeeper build a KTBH in my area. A recent trip to the giant lumber store revealed 2” by 12” by 12’ (enough for a 48” hive) is around $18 and a 1” by 12” by 12’ is around $20! As of right now it is cheaper to go thicker if you are buying the stock to build a hive.