Black Carpenter ants are different from pharaoh ants, in their appearance and habits. They prefer dead, damp wood in which to build nests. They do not eat it, unlike termites. Sometimes carpenter ants will hollow out sections of trees. Certain parts of a house, such as around and under windows, roof eaves, decks and porches, are more likely to be infested by Carpenter Ants because these areas are most vulnerable to moisture. Carpenter ants can damage wood used in the construction of buildings. They can leave behind a sawdust-like material called frass that provides clues to their nesting location. Carpenter ant galleries are smooth and very different from termite-damaged areas, which have mud packed into the hollowed-out areas.