Hi All,
I seem to have a large ant population living somewhere under the front of
the house. They are throwing out quite large amounts of sand / soil.
Can they cause structural damage to the house? They ventured into the house
earlier this year, but some ant stop spray stopped them right away. Now I'm
just worried about them damaging the house.
On the front yard (paved) they seem to appear by making holes surrounded by
sand/earth from the edges of the paving.

let me know if there's anything I should do. How much would an exterminator
cost?

Thanks,
Matthew