While powderpost beetles frequently breed in dead and dried hardwoods like tree limbs and branches. They get indoors when lumber is stored improperly, prior to being made into hardwood floors, cabinetry, or structural timbers. Adult beetles deposit their eggs in the pores and exit holes of lumber, most frequently in the springtime. The mature larvae are small, white grubs just a fraction of an inch long that remain in the wood through the winter and reach their adulthood in the spring. These beetles then do additional damage trying to exit the wood that they were born into. Life cycles are long, lasting anywhere from one to five years, depending on species—so infestations are not immediately noticed.
Powderpost beetles attack all types of woods, including hardwood, softwood or bamboo. They can be found in wooden floors, timbers and crates, antiques and other objects made of wood.