How To Spider Proof Your House
Spiders are useful in the garden, but not everyone wants webs in the entryway, garage, or bedroom. Over years of home maintenance and late-night web-scraping, I’ve learned practical, humane, and effective ways to keep spiders out of living spaces. This guide walks you through everything you need to know to spider proof your house, from identifying entry points to long-term prevention.
Understand the Spiders First
Before you start sealing and spraying, it helps to know the enemy. Most spiders you see indoors are harmless house spiders that came in accidentally. A few species, like wolf spiders, seek shelter, while others follow prey into homes.
Common indoor spiders to recognize
- House spider — small webs in corners and basements.
- Wolf spider — ground-dwelling, larger, often in garages and sheds.
- Jumping spider — curious, small, often on walls and windows.
- Cellar spider — long legs, messy webs in dark corners.
Knowing what you’re dealing with changes your approach. For example, if you mostly see webs on the porch, prevention focuses on exterior entry points and outdoor lighting. If spiders are in the attic, insulation and ventilation gaps are the likely culprits.
Seal and Repair: The Foundation of Spider Proofing
Sealing entry points is the most effective long-term solution. Spiders slip in through tiny gaps. You don’t need to make your home airtight, but closing obvious pathways makes a big difference.
Key places to inspect and seal
- Doors: Install or replace door sweeps and repair gaps around frames.
- Windows: Replace torn screens and caulk gaps where frames meet siding.
- Vents and utility penetrations: Use mesh or foam backer rod and caulk to seal gaps around pipes, dryer vents, and electrical conduits.
- Foundation cracks: Use masonry sealant or hydraulic cement for visible cracks.
- Attic and eave vents: Cover with fine mesh to keep spiders and insects out while preserving airflow.
Tip from my own toolbox: I keep a tube of exterior-grade caulk and a roll of 1/8-inch hardware cloth on hand. I patched a gap behind a new exhaust fan with caulk, then backed the repair with hardware cloth—no more spiders on that wall.
Reduce Indoor Attractants
Spiders follow food, which means they follow insects. Reducing the insect population inside and just outside your house will naturally reduce spiders.
Daily habits and home adjustments that help
- Keep lights off near entrances at night or use yellow “bug” bulbs that attract fewer insects.
- Vacuum regularly, especially corners, under furniture, and along baseboards.
- Declutter storage areas like garages, basements, and attics where spiders like to build webs.
- Store firewood away from the house and raise it off the ground.
- Seal food containers and avoid leaving fruit or crumbs out.
Personal note: After moving my woodpile three feet away from the shed and elevating it on pallets, the number of spiders I found in the shed dropped dramatically within a month.
Natural and Chemical Options
If exclusion and sanitation aren’t enough, there are both natural repellents and chemical treatments that can help. I prefer starting with low-toxicity methods and moving up if necessary.
Natural remedies I’ve tried
- Essential oil sprays: A mix of water, a few drops of peppermint oil, and a little dish soap sprayed around windows and doorways can deter spiders temporarily.
- Vinegar solution: White vinegar diluted with water sprays away webs and discourages spiders from rebuilding in the same spot.
- Chestnuts or horse chestnuts: Some people swear by placing chestnuts in windowsills; opinions vary, but it’s harmless to try.
When to use chemical treatments
- Perimeter barrier sprays: Professional-grade perimeter insecticides can reduce insect prey and spider populations for months.
- Residual indoor sprays: Used sparingly by professionals in basements and attics if infestations persist.
- Sticky traps: Good for monitoring and catching wandering spiders without chemicals.
Quote: “I always try the gentlest method first; most years, a combination of sealing gaps and a few targeted natural sprays keeps my house spider-free.” — me, an enthusiastic gardener and weekend handyman
Outdoor Maintenance Makes a Big Difference
A well-maintained exterior keeps spiders from ever wanting to come inside. Landscaping choices and regular maintenance reduce hiding places and nearby insect populations.
Practical outdoor steps
- Trim vegetation away from the house and keep mulch a few inches from siding.
- Repair exterior damage and keep gutters clean to avoid humid areas where insects breed.
- Minimize outdoor clutter like old pots, corrugated roofing, and unused furniture.
- Change outdoor lighting to yellow bulbs and reduce unnecessary nighttime lighting.
When to Call a Professional
If you’ve tried sealing, cleaning, and DIY treatments but still find frequent or large spiders—especially if venomous species are suspected—call a pest control professional. They can identify species, treat nesting sites, and offer a targeted plan tailored to your home.
Final Thoughts and Long-Term Strategies
Spider proofing is a combination of smart home maintenance, reducing attractants, and targeted treatments when necessary. It doesn’t require dramatic measures—small, consistent actions yield big results.
- Inspect your home seasonally, especially in spring and fall.
- Keep a basic kit: caulk, door sweeps, fine mesh, a vacuum, and a natural spray.
- Be patient—once you reduce food sources and seal entry points, spider sightings usually drop over a few weeks.
Personal closing: I enjoy the balance of letting beneficial garden spiders do their job outside while keeping my living spaces comfortable and web-free. With a bit of diligence and the tips above, you can enjoy the same peace of mind in your home.
