Carpenter ants live both outdoors and indoors. They make their nest in or near moist, decaying or hollow wood. Chewing into the timber, they will carve tunnels through which they will travel and nest. This makes them a renowned pest due to the amount of damage they can cause to property. The parts of houses often targeted are under windows, roof eaves, decks and porches. They leave behind sawdust from their exploits in the same way that termites do.