Fall Invaders: How to Keep Stink Bugs, Spiders, and Rodents Out as Temperatures Drop

Fall’s not just for foliage, it’s also prime time for pests. Crisp air, colorful leaves, cozy sweaters—fall has a lot going for it. Unfortunately, it also signals something else: pests on the move. As temperatures drop, insects, rodents, and even wildlife start looking for warm, sheltered spots to ride out the winter. Too often, that spot ends up being inside your home.

The good news? A little prevention now goes a long way toward keeping your home pest-free through the cold months ahead.

What Pests Are Looking for This Time of Year

No matter the species, most fall pests are after the same three things as humans:

• Shelter: A protected place away from the cold.
• Food: Easy access to crumbs, pantry goods, or even pet food.
• Moisture: Leaks, standing water, and damp basements are pest magnets.

Here’s the catch: by the time you notice activity, there’s a good chance pests have already settled in. What looks like “just one mouse” or “just a couple of stink bugs” can quickly turn into a full-blown infestation. Over-the-counter sprays or traps might provide temporary relief, but they rarely solve the root of the problem.

Top Fall Invaders to Watch Out For

• Stink Bugs & Other Overwintering Pests (boxelder bugs, cluster flies, lady beetles): Congregate on sun-warmed walls, then slip indoors through cracks and crevices.
• Spiders: Follow their food sources (other insects) inside and settle in quiet corners.
• Rodents (Mice & Rats): Can squeeze through gaps as small as a dime to nest in walls, attics, and basements.
• Additional Invaders–Squirrels & Bats: Larger wildlife pests that can exploit rooflines, chimneys, and attic vents.

5 Ways to Keep Fall Pests Outside Where They Belong

• Seal Entry Points Before It Gets Cold

Inspect your foundation, siding, and roofline for cracks, gaps, or broken seals. Caulk, weatherstripping, and professional sealing make a huge difference.

• Install or Repair Door Sweeps and Screens

Even the tiniest gaps under doors or around window units act like “welcome” signs for pests.

• Declutter Your Yard and Foundation Perimeter

Move firewood away from the house, clear leaf litter, and trim shrubs so they don’t touch your siding.

• Reduce Indoor Attractants

Fix leaky faucets, store food in airtight containers, and organize attics or basements with sturdy plastic bins instead of cardboard boxes.

• Schedule a Fall Preventative Treatment

A professional treatment with Thomas Pest Services creates a protective barrier around your home before pests move in.

Why Fall Is the Most Critical Time for Pest Prevention

The truth is a little prevention goes a long way. Once pests get in, they’re tough to get out. Rodents multiply quickly, and overwintering insects hide in wall voids you can’t reach with a vacuum or spray. Preventing access now means fewer headaches during the holidays, less stress in early spring, and long-term protection for your home and family.

Lock Down Your Home Before Pests Settle In

At Thomas Pest Services, our Fall Pest Prevention Services are designed to stop invaders in their tracks. Services include:

• Barrier treatments tailored to your property
• Full exterior inspections
• Rodent prevention and control
• Expert sealing recommendations for vulnerable areas

Fall pests are persistent, but with the right preparation, your home can stay protected all season long. Don’t wait until you spot them—take action before they get in.

Act now to avoid long-term infestations—book your fall pest inspection today. Our Complete Care Plan offers year-round peace of mind with proactive service.