My regime for ants (carpenter, in my case) is as follows:
1) Heat gun. Get the entire area hot. This among other things will dry out any moisture which might be attracting them.
2) Boric acid + Diatomaceous earth, blown into any cracks.
3) Traps made up of Boric Acid, Diatomaceous earth and sugar syrup.
4) Fix any water problems.
5) Plant ant hated stuff around the outside of the house.