How Do Spiders Get In My House? - Terminix

Content Updated: September 2, 2025

Spiders can be a common sight in many homes, especially during certain times of year. Most spiders are harmless and can actually help control other bugs, but seeing them inside might be a sign that small cracks or gaps are letting them in.

Understanding how spiders get in the house and whether seeing them is something to worry about can help you take the right steps to protect your home from them.

Where do spiders come from?

How do spiders get in the house? Spiders can get into your home in a few common ways:

• Through cracks and gaps around doors, windows, vents, or plumbing
• Hitchhiking on boxes, firewood, plants, outdoor toys, or other items brought indoors
• Open garage doors or pet doors
• Through damaged or poorly sealed screens on windows or vents

Where do spiders come from, and why are they in your home? They may enter on their own if they’re looking for:

• Food (insects and other pests)
• Shelter from cold or dry outdoor conditions
• Mates, especially during their active season

As they search for these attractants, you may see an increase in spider activity indoors around late summer and early fall (August–October). However, in warm or cluttered homes, they may be active year-round.

How can I keep spiders out of my house?

Now that you understand more about where spiders come from, it’s time to take steps to help reduce their populations indoors:

• Seal entry points – Use caulk to close cracks and gaps around windows, doors, pipes, and the foundation
• Repair screens – Fix or replace torn window and door screens
• Use door sweeps and weather stripping – Make sure doors and windows close tightly
• Declutter inside and out – Reduce hiding spots by keeping storage areas tidy, and remove piles of wood, leaves, or debris near the home
• Limit outdoor lighting – Lights can attract insects, which can attract spiders. Use yellow bulbs or motion-sensor lights when possible
• Inspect items before bringing them inside – Check boxes, plants, firewood, and outdoor gear for spiders
• Vacuum regularly – Remove webs, egg sacs, and hiding spiders from corners, ceilings, and behind furniture

Even with the best prevention, spiders can still find their way inside. Terminix offers professional spider control services that can help identify spider hotspots, treat infestations, and implement ongoing protection to help keep spiders and the insects they feed on out of your home.