Bee space is the crawl space the bees maintain between and around the comb.
The dimensions of bee space are between 3/16 inch and 3/8 inch.
If the space is narrower than 3/16 inch, the bees seal it with propolis,
a caulking material consisting of resins, wax, and plant fibers.
If the space is larger than 3/8 inch, the bees build comb across it.
By keeping all designed spaces between the frames and hive walls within the
limits of bee space, we prevent the bees from locking all of our equipment
into a solid block of wax, honey and wood.