While sitting on the patio today I saw a huge carpenter bee checking out the overhang. I've had some issues with them in the past boring holes in that overhang as well as in a deck rail but I came across something interesting that I'm going to try.
Since I try to use pesticides very sparingly I was pleasantly surprised to run across this, hopefully it will work for me too.
https://www.pinterest.com/pin/123356477270340098/