There's something uniquely unsettling about walking into a room and spotting a spider dangling from the ceiling or scurrying across the floor. While most household spiders are harmless and even helpful at controlling other insects, that knowledge rarely brings comfort when you're the one who has to deal with them. The good news? Keeping spiders out of your house doesn't require harsh chemicals or constant vigilance—just a smart, consistent approach that addresses why they're coming inside in the first place.
How to Keep Spiders Out of Your House by Removing Their Food Source
Spiders don't wander into your home for shelter alone—they follow their prey. If your house has a steady population of flies, mosquitoes, ants, or other small insects, spiders will treat it like an all-you-can-eat buffet. This is the single most overlooked factor in spider prevention.
Start by addressing outdoor lighting. Insects swarm to bright white lights at night, and spiders follow close behind. Swap standard bulbs for yellow or amber LED bulbs, which are far less attractive to flying insects. Motion-sensor lights are even better, since they only illuminate when needed.
Inside, keep kitchens and dining areas meticulously clean. Wipe counters nightly, store food in sealed containers, and don't let dirty dishes sit in the sink. Take garbage out regularly and use bins with tight-fitting lids. Even small crumbs can sustain insect populations that sustain spiders.
Consider whether you have moisture issues attracting pests. Leaky pipes, damp basements, and clogged drains create ideal conditions for the insects spiders love to eat. A dehumidifier in chronically damp spaces can break this chain by making the environment inhospitable for both insects and the spiders hunting them.
Seal Every Entry Point Spiders Could Use
Spiders are remarkably adept at squeezing through tiny gaps—some species can fit through openings no thicker than a credit card. A thorough inspection and sealing of your home's exterior creates a physical barrier that's highly effective at keeping spiders out of your house.
Begin with doors and windows. Replace worn weatherstripping, install door sweeps, and repair torn screens. Check the frames themselves; gaps between the frame and wall often develop as houses settle. Caulk these generously with a high-quality silicone or acrylic latex caulk.
Move to your foundation and exterior walls. Look for cracks in concrete, gaps around utility penetrations (where pipes, cables, and vents enter), and spaces under siding. Use expanding foam for larger gaps, but trim it flush once cured—spiders can actually crawl across rough foam surfaces if they're not sealed with caulk afterward.
Don't forget your attic, basement, and crawl space. These areas often have unsealed vents, gaps around chimney flues, or openings where joists meet the foundation. Cover vents with fine mesh screens (20 mesh or finer) that allow airflow but block spiders and their prey.
Finally, examine your roofline. Soffit vents, gaps in fascia boards, and damaged roofing materials can all provide access. These higher entry points are especially relevant for orb-weavers and other spiders that naturally live at elevation outdoors.
Key Tips for a Spider-Resistant Home
Beyond the fundamentals of food elimination and sealing, several targeted strategies make your home genuinely unappealing to spiders.
Declutter relentlessly. Spiders need harborage—quiet, undisturbed places to build webs and lay egg sacs. Cardboard boxes, piles of newspapers, unused clothing in heaps, and storage items pushed against walls all provide ideal spider real estate. Switch to plastic storage bins with tight lids, keep items off the floor on shelving, and maintain space between stored goods and walls for inspection and cleaning access.
Manage your landscape strategically. Vegetation touching your home's exterior acts as a bridge for spiders. Trim shrubs, tree branches, and ornamental grasses to maintain at least a foot of clearance from walls and rooflines. Move firewood, compost bins, and rock piles away from the foundation—these are prime spider habitat. Consider replacing dense ground covers like ivy with something less hospitable near your home's perimeter.
Vacuum with purpose. Regular vacuuming removes spider webs, egg sacs, and the insects spiders eat. Use a wand attachment for corners, ceiling joints, behind furniture, and under appliances. Immediately dispose of the vacuum bag or empty the canister outside, as spiders can survive and escape from collected debris.
Use essential oils cautiously. Peppermint, tea tree, and eucalyptus oils are frequently cited as spider repellents. While evidence of their effectiveness is mixed, they may provide modest supplementary benefit. Mix 15-20 drops with water in a spray bottle and apply to known entry points and corners, refreshing weekly. Never use undiluted oils, which can damage surfaces and irritate skin.
Address garage and shed connections. These transitional spaces often harbor spiders that eventually migrate indoors. Treat them with the same sealing and cleanliness standards as your main living space, and avoid leaving garage doors open for extended periods, especially at dusk when many spiders become active.
Final Thoughts
Learning how to keep spiders out of your house effectively comes down to understanding spider behavior and systematically removing what attracts them. No single tactic works in isolation. The homes with the fewest spider problems combine diligent exclusion (sealing), environmental management (reducing prey and harborage), and consistent maintenance habits.
Be patient with the process. If you've had spiders established in your home, it may take several weeks of consistent effort before you notice significant reduction, as you're disrupting established populations and waiting for outdoor migration pressure to decrease. The investment pays off in a home that feels genuinely yours—not shared with eight-legged roommates you never invited in.
If despite your best efforts you're seeing numerous spiders, particularly in basements or undisturbed areas, a professional inspection can identify hidden moisture problems, structural entry points, or pest issues that DIY efforts haven't resolved. Sometimes an outside perspective catches what familiarity misses.