Mouse Control for Kitchens and Wall Voids

Mouse Control

The house mouse is the rodent most homeowners in our region actually meet. It is small, gray or brown, and it lives closer to people than any other rodent. A mouse can pass through a gap about the width of a pencil, which is why a house that looks tight from the driveway can still have a steady mouse problem.

Mice do not travel far once they are inside. A house mouse tends to live within a short distance of its food, so the kitchen is where the signs usually show first: small dark droppings along the back of a counter, inside a pantry or under the sink, a gnawed corner on a cereal box or a bag of pet food, and a faint musky odor in a closed cabinet. From the kitchen they move through wall voids, following plumbing and wiring, and nest in insulation, behind appliances and inside stored boxes.

The entry points are the same ones we find for other rodents, only smaller. Gaps where pipes and cables pass through the sill plate and the exterior wall, the corners of a garage door, a crawl space vent with a bent screen and the joint where siding meets the foundation are the common ones here. Mice also come up from the crawl space through openings around plumbing and ductwork, so a house with a damp, open crawl space often has a mouse population underneath that feeds the one in the kitchen.

Our approach follows the signs rather than the assumptions. The inspection traces droppings, gnaw marks and rub marks back toward the openings mice are using. From there the work takes one of three shapes. Tamper resistant bait stations along the runways reduce a population that is already inside. One time exclusion seals the openings with materials a mouse cannot chew through. The rodent prevention program is for properties where mice arrive every fall.

We are honest about the limits. Mice live in fields, woodpiles and outbuildings around almost every home in southern Virginia and northern North Carolina, and they move toward warm structures when nights cool. What we can do is reduce the animals inside, close the openings they are using, and hold the population at the lowest practical level.