re: Bees keep coming back under my siding and hive in my subfloor

Once you get a hive building in a spot, that spot is kind of "marked" and it is hard to keep scouts from finding it the next couple of years.

Since you mentioned sealing up the spot, I'll give you the benefit of the doubt and not preach about finding every nook and cranny to fill in. I don't know if this is an option for you in this particular spot, but expanding foam really helps with this.

I will say that my first recommendation would be to do what the poster above poster mentioned and have a local beekeeper put a swarm trap or 2 out there as a first line of defense. This could be enough to redirect the scout bees from that particular spot. If you don't like the idea of inviting someone else to your property (completely understandable), setting traps out is pretty easy and would take a couple minutes of youtube research to figure out.

I hate this last suggestion but I also understand your perspective as a property owner who doesn't want their camp damaged by unwanted wildlife trying to move in. Talstar P has a residual effect and if applied at the end of January/beginning of February, should last through most of swarming season. Note that this stuff will kill anything so do not go around spraying all over your landscape. The people who say they do that here really have no clue on the damage they are doing.

Again, I would suggest you exhaust all other possibilities first, but as a last resort, Talstar P applied only to the problem area will fix your issue.