Over the past few days I have noticed ants crawling up the outside wall of the house. If our house was painted dark, I would never have spotted them, but on the cream colored stucco the ants are easy to see.
I haven’t noticed ants around inside the house, and these large black ants are different than the little brown ones that can show up when the fruit basket on the counter gets a little too ripe. Unlike those critters, these ants are not coming into the house looking for food, they are leaving the house empty-mandibled and return with bits of food in their jaws. Whatever they are building or feeding, I don’t want it in my house.
From what I’ve seen, the ants are gathering at a small gap where the wall of the rear addition meets the original rafters. The clearance there is only half an inch, so it’s hard to know how well sealed the wall is there.
For right now, I have put out some ant baits that should take care of the current colony, but the long-term solution will be to make sure there isn’t a point of entry for insects at this place in the wall/roof. The gap is a bit too large for caulk, so I will try to fashion a shim to fit between the rafter and the wall. Then I can caulk any remaining gap.