Carpenter Ants do not need rotting wood but prefer it due to it’s pliable texture. They are also known to nest inside styrofoam insulation, under regular insulation, and even under old tarps sitting outside.You can find carpenter ants nesting just about any place in and around a structure. Examples are: old dying trees, tree stumps, and firewood. You also may be dealing with more then one colony. Carpenter Ants will will establish satellite colonies through out the area.The main colony is usually found outside in a tree. It takes approx. 3 months months in ideal conditions to form a colony.