Rodent Exclusion and Sealing in Overland Park

Trapping takes care of the mice already in the house. Sealing keeps the next batch out. If you've had mice two or three winters running, the gaps are still open, simple as that. Exclusion goes hand in hand with trapping the mice inside and, where it's needed, rat work around the yard.

Houses around here also move. Johnson County clay swells when it's wet and shrinks in a dry August, and over the years that opens hairline gaps at the foundation and pulls caulk away from pipes. The job is a careful walk around the house, low and high, finding every opening a mouse could use. Then each one gets closed with something they can't chew: copper or steel mesh packed in tight, hardware cloth, metal flashing, sealant over the top. Spray foam by itself doesn't cut it. A determined mouse goes right through it in a night.

Signs the House Still Has an Open Door

You don't need a ladder to figure out whether your house leaks. A few things tell you pretty plainly:

• Mice come back every fall even though you trapped last year
• Daylight shows under the garage door at the corners
• Droppings turn up in the same basement room each winter
• Chewed foam or caulk around an outside pipe
• A dryer vent flap that's stuck open or missing

Sill Plates in North OP, Rooflines in Blue Valley

Overland Park has two kinds of houses, and they leak in different places. The ranches and split-levels from the 1950s through the '70s have had decades to settle, and the older streets north of I-435 show it at the sill plate, where the wood frame sits on the foundation, and around every pipe somebody ran through the wall since. In Prairie Village the seam where an addition meets the original house is a regular culprit.

The big two-stories in Blue Valley and south OP are newer, but there's a lot of house to cover. Techs spend most of their time on the roofline (soffits, roof returns, the spot where the garage roof meets the main house) and on the three-car garage. Walkout basements put a whole wall of doors, windows and lines right at ground level. Older crawl-space homes, like the ones near the square in Olathe, need screened vents and a tight access door.

• Sill plate gaps and old utility holes
• AC line set and gas meter penetrations
• Garage door corners and bottom seals
• Soffits, roof returns and gable vents
• Sump discharge pipes and window wells

Sealing in August Beats Sealing in November

Timing matters more than people think. In late summer the mice are still living outside and most gaps are empty, so whatever gets closed then stays closed when the first cold snap hits in October. Sealing in winter still helps. It just means some mice are already inside, and the tech may trap first and seal once activity drops so nobody gets shut in a wall. Our guide on the fall mouse push explains the timing.

The inspection is thorough, often with a flashlight and a mirror. Inside, they'll check the basement rim joist, the furnace room and under the sinks. Mice in a finished basement shows the rim joist gaps they look for. Afterward you should get a list of what they found and what they'd use on each gap. Some companies seal the same day, others schedule it. If the attic's been lived in, the plan might add cleanup up there, and a tight garage is a big part of most jobs, which is covered on the garage and shed page.

Two houses on the same street can need very different amounts of work, so the quote comes after the walk-around. It mostly depends on the number of gaps, how high up they are and how many garage doors need new seals. Ask what their work covers and how long they expect it to hold.

Related: Mouse Control, Rat Control, Attic and Crawl Space Cleanup

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