Ants generally become a problem in houses and other buildings when their nests have become disturbed by rain, or conversely, during dry weather to look for water, or a nesting place.  Poor hygiene and and pet bowls also draw them indoors.

Outside conditions such as sandy areas, pavers and garden pots also are favorable conditions for ants. Major colonies may be found under insulation batts in the roof and in the wall cavities

Control methods