Currently, the database to which we subscribe for this type of information has current data for about 30 of the 50 states. Many different kinds of spiders live in and around buildings. Most spiders are harmless and in fact are beneficial because they prey upon flies, crickets and other insects. Rubber gloves should be worn if you suspect the area has brown recluse or black widow spiders. A vacuum cleaner or broom effectively removes spiders, webs and egg sacs.
Spiders prefer quiet, undisturbed areas such as closets, garages, basements and attics.
Reducing clutter in these areas makes them less attractive to spiders. Large numbers of spiders often congregate outdoors around the perimeter of structures. Migration indoors can be reduced by moving firewood, building materials and debris away from the foundation. Shrubs, vines and tree limbs should be clipped back from the side of the building. Install tight-fitting window screens and door sweeps to exclude spiders and other insects.