The garage is the most overlooked pest entry point in residential pest control. Most homeowners focus on sealing foundation cracks and installing door sweeps on exterior doors while ignoring the 16-foot-wide opening that connects directly to their home. Garage doors leave gaps at the bottom, sides, and weatherstripping that mice, spiders, earwigs, crickets, and even rats exploit nightly.
Making it worse: garages are often filled with the things pests love — stored pet food, birdseed, cardboard boxes, firewood, and undisturbed clutter that provides perfect harborage.
The bottom of your garage door is the biggest pest entry point on your entire property. Check the rubber weatherstripping seal — if you can see daylight underneath when the door is closed, pests can enter. Replace cracked, compressed, or missing bottom seals ($15–30 for a universal replacement).
Side and top seals matter too. The gaps between the door panels and the frame on each side and across the top allow insects and even mice to squeeze through. Brush-style or rubber weatherstripping for the sides ($10–15 per side) closes these gaps.
The interior door: The door from your garage into your house should have a tight-fitting door sweep and weatherstripping. This is your last line of defense — if pests get into the garage, this door determines whether they reach your kitchen.
Eliminate cardboard. Cardboard boxes are cockroach habitat, silverfish food, and mouse nesting material. Replace all cardboard storage with sealed plastic bins. This single change dramatically reduces pest harborage.
Seal all food. Pet food, birdseed, grass seed, and fertilizer should be stored in hard-sided, sealed containers (metal or thick plastic with locking lids). A bag of dog food on the garage floor is a mouse buffet and recruitment beacon.
Elevate storage. Keep items off the floor on shelving. This eliminates ground-level harborage, makes inspection easier, and reduces contact with moisture that seeps through concrete floors.
Move firewood out. Firewood stored in the garage brings in spiders, beetles, carpenter ants, termites, and centipedes. Store firewood at least 20 feet from the house, elevated off the ground on a rack.
Perimeter spray — apply bifenthrin around the interior perimeter of the garage floor, focusing on the garage door threshold and along walls where they meet the floor. Reapply every 60–90 days.
CimeXa dust — puff into gaps around the interior door frame, behind electrical panels, and into any visible wall void access points. Lasts years in dry conditions.
Snap traps — place mouse snap traps along walls, behind storage, and near the interior door. Garages are where mice first establish before moving into the house. Catching them here prevents kitchen infestations.
Glue boards — place along walls to monitor what's entering. Check monthly — what you catch guides your prevention priorities.