Spiders are mostly harmless and even helpful — they eat other pests — but few people want them sharing the house. Getting rid of them for good means understanding why they're there in the first place.
Why Spiders Come Indoors
Spiders follow their food. If you have spiders, you usually have the insects they're hunting — flies, gnats, mosquitoes, roaches. They also seek shelter, moisture, and quiet, undisturbed spots: corners, basements, garages, closets, and around exterior lights that attract their prey at night.
Reduce What Attracts Them
The single best way to control spiders is to control the insects they eat. Beyond that: knock down webs regularly, declutter storage areas, seal cracks and gaps around windows and doors, switch exterior bulbs to yellow "bug" lights that draw fewer insects, and keep vegetation and mulch back from the foundation.
Treatment That Works
Because spiders are drawn by prey, effective control pairs direct spider treatment (web removal and residual application in harborage areas) with general pest control that removes their food source. Treating only the spiders — without addressing the insects — tends to give short-lived results.
Dangerous Spiders in the Carolinas
The vast majority of spiders here are harmless, but two warrant respect: the black widow (glossy black with a red hourglass) and the brown recluse (uncommon, with a violin-shaped marking). Both prefer dark, undisturbed spaces like woodpiles, garages, and boxes. If you find either indoors, or spiders keep returning, a professional treatment is the safe move.
Frequently Asked Questions
Control the insects they eat, knock down webs, declutter and seal gaps, use yellow exterior bug lights, and keep vegetation off the foundation. A professional treatment that also targets their food source gives the most lasting results.
The vast majority are harmless and actually helpful, eating other pests. The exceptions in the Carolinas are the black widow and brown recluse — both uncommon indoors and preferring dark, undisturbed spots.
Their prey — flies, gnats, mosquitoes, and roaches — plus shelter, moisture, and quiet corners. Exterior lights that draw insects at night also attract spiders to entry points.
Yes — especially when it pairs direct spider treatment with general pest control that removes the insects spiders feed on. Treating the food source is what keeps them from coming back.