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How to spider proof your home
Prevent spiders from entering your home through doors.
Make sure spiders can't get through any gaps in your exterior doors. Install door sweeps on all of your exterior doors; spiders can squeeze through an opening that is 1/16 " (mm) tall.
Use caulk to seal the outside edges of your doors, but use foam weather-stripping to line the bottom track of sliding glass doors. Stop spiders from gaining entry to your house through utility openings.