Bert Byfield wrote:
I've got some big black not-very-fuzzy bees hovering about two fee off
my rafter edges. Anyone know what that behavior means? They're quick,
too, they dodge the spray can pretty well.

These bees can be quite destructive to wood -- even treated lumber.
They will eventually hollow out the board. I would suggest a thick coat
of paint on the bottom surface of the wood to discourage them as they
always bore holes on the bottom side.