If these guys are the black face hornets, then the nest will be one of those paper nests. HOPE, I SURE HOPE it is on a branch. Last time I had to do it, I took my time and trimmed branches as far back as I could get Waited till dark Took one of those industrial 100 gallon plastic bags, put over the nest and branch, dropped a flying inset bomb in the bag and sealed it up.
Haven't had to deal with one on the edge of building yet.
These critters just confused me. Never seen them with these markings. I've seen all kinds of bald face and Japanese hornets, but these guys were new to me.