I'm looking for advice on doing a cutout from behind a plaster wall. The bees are coming into a crack in between bricks on a second story building, at about the level of the floor. Getting to them from the outside won't be possible. From the inside, prying up some of the old floorboards right next to the wall, and pushing aside the insulation in that floor, I was able to see the bottom of the hive, it is surely in the wall. The owner is okay with me cutting up his wall but I would like to minimize the mess and damage done.
The house is about 90 years old I reckon, and I am pretty sure the lathe is wood. It looks like the electricity was actually added later. . . there is a socket which was clearly installed afterwards. I understand I should cut the electricity off but any tips for not accidentally cutting through any wires? Also, can I use the location of this socket to locate the wall studs? There is also a dryer exhaust vent going plumb through the wall, if that matters. Next, where do I determine the top of this hive? Is there likely to be some kind of cross bar? Maybe under the window? Anyway of locating the top of the hive easily?
Finally, what should I actually use to cut the plaster away? I was thinking circular saw set just deep enough to get through the plaster, and then a second pass to go through the lathe, with a shop vac right behind the cut to suck up the dust. . . am I going to fill the bee cavity with plaster dust using a circular saw? Any tips, stories, advice, anecdotes to share about getting bees out from behind plaster walls? Thanks yall!