Every fall, the same thing happens. You walk outside on a cool morning and notice a cluster of brown, shield-shaped insects crawling across your siding, screen door, or window frame. They aren’t doing any damage. They’re not nesting. They’re just catching the last of the warm sun before temperatures drop for good. That’s the brown marmorated stink bug doing exactly what it’s built to do: find a warm place to wait out winter.
The problem isn’t what they’re doing outside. It’s what happens next. Once they find a gap around a window frame or a crack in your foundation sill, they move in. And if you’ve got kids or pets near those same doors and windows, you want to know that whatever you use to stop them is safe for your household. That’s something we take seriously at Fortified Pest Control.
If you’re in the Fort Wayne or Huntington area, here’s what you need to know about stopping stink bugs before they settle in for the season.
Why Stink Bugs Show Up Every Fall
The brown marmorated stink bug, or Halyomorpha halys, doesn’t come inside looking for food. It’s looking for a place to overwinter, a dormant state insects enter to survive cold months. Your attic, wall voids, and window casings are exactly what they’re after: sheltered, insulated, and dry.
Indiana residents have been dealing with this species since at least October 2010, when it was first collected in Elkhart County, according to the Indiana Department of Natural Resources, Division of Entomology and Plant Pathology. It’s now distributed statewide, and Purdue Extension notes that homeowners in northern Indiana are very familiar with this insect as a fall home invader. Fort Wayne and Huntington fall squarely in that pressure zone.
This fall carries an extra reason to act early. The National Pest Management Association’s Fall 2025 Bug Barometer specifically named the Great Lakes, Ohio Valley, and Midwest as regions likely to see increased stink bug encounters this season. Unseasonably warm and dry conditions could allow these invasive pests to survive longer outdoors before being driven inside when temperatures drop, meaning more activity at your entry points as the season progresses.
Where They’re Getting In
Stink bugs don’t need much space. A gap the width of a pencil around a door frame or a small tear in a window screen is enough. The most common entry points are gaps around window frames and sills, spaces under exterior doors, cracks where utility pipes and dryer vents pass through walls, and separations in siding near the roofline.
Light makes the problem worse after dark. Stink bugs are strongly attracted to bright sources, which means porch lights and the glow through uncovered windows pull them directly toward your entry points in the evening. Once one bug finds a suitable harborage site, others aggregate there in large numbers. What starts as a handful on your south-facing wall can become dozens if the right conditions are in place.
Fall Pest-Proofing Checklist
The window between late summer and early October is when exclusion work actually makes a difference. Once bugs are inside wall voids, sealing entry points just traps them in your home until spring. These steps are most effective before you start seeing large numbers indoors.
Entry point sealing is your first priority:
- Caulk gaps around window frames, siding seams, and foundation joints with silicone or silicone-latex caulk, which holds up better through freeze-thaw cycles than standard acrylic.
- Add door sweeps to all exterior doors, paying close attention to garage entry doors and back doors where gaps tend to be wider.
- Check where utilities enter the home, including dryer vents, A/C lines, and pipe penetrations, and seal any gaps larger than a pencil diameter.
Screens and vents need attention too:
- Inspect every window and door screen for tears, bent frames, or gaps where the screen meets the frame. Even a small hole is enough.
- Screen attic vents, crawl space openings, and ridge vents with fine mesh hardware cloth to close off harborage sites above and below your living space.
Manage what’s attracting them to your exterior:
- Swap bright white porch bulbs for yellow or sodium vapor bug lights, which are far less attractive to stink bugs and other insects after dark.
- Move firewood, leaf piles, and yard debris at least 20 feet from your foundation, since these materials hold warmth and moisture that make good temporary harborage.
If Stink Bugs Are Already Inside
The most important rule: don’t crush them. The odor a stink bug releases when threatened or killed is persistent, lingers on fabric and carpet for days, and can attract more bugs if others pick up on the scent.
The safest removal method is a vacuum. Pick them up, then immediately take the bag or canister outside and dispose of it. A bag left in your vacuum will keep smelling, and any live bugs can work their way back out. For overnight trapping, place a shallow pan of soapy water under a bright lamp in a darkened room. Stink bugs drawn to the light will fall in and can’t escape the surface tension. These methods work fine for a handful of bugs. If you’re finding them every day in multiple rooms, the problem is bigger than indoor removal can address.
When Sealing Alone Isn’t Enough
Pest exclusion (sealing entry points) is essential, but it’s only part of what works. If stink bugs have been overwintering in your home for more than one season, or if you’re seeing large numbers despite sealing efforts, a perimeter treatment applied at active entry points is what completes the picture.
Integrated pest management (IPM) combines exclusion with targeted treatment at the places bugs are actually entering, rather than broadcasting pesticide broadly. This approach is more precise, longer-lasting, and lets us use products that are safe for kids and pets while still being effective. It’s the difference between patching a screen and understanding the full path bugs are using to get into your home.
The Fort Wayne and Huntington area is in an active pressure zone this fall, which means now is the time to get ahead of the problem rather than waiting until you have bugs in your bedroom ceiling. We offer free estimates and same-day service using kid- and pet-safe products. Give us a call at (260) 529-5182 and we’ll take a look.