I’m noticing a small dirt pile against my foundation and under the side of the house that was recently repaired for rot. It looks like ants are making their way in between the shell thing patch price under the siding. Is the debris in the dirt pile from the sheathing or dirt under the pavement? Is there a caulking, spray foam, stuffing and or spray I should use here. It only is happening in one spot around my foundation. Thank you kindly. Eastern Passage.

Expanding foam (see for an example) can be used as a barrier to ant entry, but be sure to clear away any loose material (soil, etc.) from around the opening to be sealed before applying the foam. There are foams available that also incorporate an insecticide – see for an example.