Most Carpenter ant species establish their first nest in decayed wood and later expand or enlarge this into sound wood. Inside, nest are located in wood (preferably softened by fungus rot, in insulations, and or in wall voids. Workers are a nuisance when out searching for food. Outside nests are typically located in rotting fence posts, stumps, old firewood, dead portions of standing trees, and under stones or fallen logs.
Carpenter ants feed primarily on insect honeydew, plant and fruit juices, insects and other arthropods. Inside they will also feed on sweets, eggs, meats, cakes, and grease. Workers will forage for distances of up to 300 feet from the nest. They typically enter buildings around door and window frames, eaves, plumbing and utility lines, and shrubs and tree branches in contact with the building.
Inside pavement ants will occasionally nest in walls, in insulations, and under floors. The most likely place is in ground-level masonry walls of the foundation and especially near some heat source in the winter. They often follow pipes which come through slabs for access to upper floors of buildings.
Outside these ants typically nest under stones, in cracks in pavement, and next to buildings. They enter buildings through cracks in the slab and walls, slab expansion, joints and the natural openings of buildings. Although not aggressive, workers can bite and sting. These ants feed on almost anything including insects, honeydew, seeds, plant sap and household foods such as meats, nuts, cheese, honey, and bread, but show a preference for meats and grease. they forage for distances of up to 30 feet (9m).