The Tiny Gaps Around Your Fishkill Home That Become Pest Highways in the Fall

Many of the pests that end up inside Fishkill homes in the fall get in through openings no wider than a pencil: a gap where a cable line passes through the siding, a crack along the foundation, or a worn seal under a door. As temperatures drop in October and November, mice, spiders, stink bugs, and other insects move along the outside of the house looking for shelter, and these small gaps lead them into wall voids, basements, and attics. At Hollenbeck Pest Control, finding these openings is a regular part of our pest control service in Fishkill, because treating pests inside the house works best when you also know how they got there.

Why Fall Brings Pests to Your Walls

Through the summer, most of these pests live outdoors in lawns, gardens, leaf litter, woodpiles, and wooded areas. Once nights turn cold, they need protection from freezing temperatures. Insects that survive the winter as adults look for sheltered spaces, and rodents look for warmth, food, and a place to nest.

Many Fishkill neighborhoods sit close to wooded areas, open fields, and the slopes of Fishkill Ridge and the Hudson Highlands. Homes near that kind of land have more pests living close to the foundation when the weather changes. Mice tend to travel along walls and edges, so they follow the foundation of a house until they reach an opening. Insects are drawn to the warmth coming off sunlit walls and escaping through gaps around the house.

The Gaps Pests Use Most Often

Most homes have at least a few of these openings. Many are small enough that homeowners never notice them.

• Utility openings: Cable lines, phone lines, air conditioning lines, gas lines, and outdoor faucets all pass through the walls of the house. The holes around them are often sealed with caulk that dries and cracks over time, or they were never fully sealed in the first place.
• Window and door frames: Exterior trim can pull away from the siding, and caulk around frames breaks down with years of weather. Door sweeps wear thin and leave a gap at the threshold.
• Garage doors: The rubber seal along the bottom of the garage door cracks and flattens, and the weatherstripping along the sides can loosen.
• The foundation and sill plate: Small cracks in the foundation and gaps where the wooden frame of the house rests on the foundation give mice and insects a way in at ground level.
• Dryer and exhaust vents: Vent flaps that no longer close fully, or vents with missing or damaged covers, leave an open path into the wall.
• The roofline: Gaps in soffits and fascia boards, gable vents without intact screens, and openings around chimneys give insects, squirrels, and bats access to the attic.
• Siding: Gaps where siding meets trim boards, corners, or the roof can lead straight into the space behind the wall.

Which Pests Use Which Openings

The size and location of a gap affect what can use it. A house mouse can fit through an opening about the width of a dime, so gaps around pipes, garage doors, and the foundation are common entry points for mice. Stink bugs, cluster flies, and lady beetles can crawl through cracks that are barely visible, especially around window frames, siding, and the roofline. Spiders, crickets, and millipedes usually enter at ground level under doors and through foundation cracks.

Larger animals work differently. Squirrels can chew the edge of a small opening at the roofline until it is large enough to fit through. Bats can enter through narrow gaps near the roof. If you are hearing noises in the attic, our post on securing Hudson Valley attics against bats, chipmunks, and squirrels explains what to look for.

Why These Gaps Are Hard to Find and Close

Many of the most important openings are difficult to see. Some are at the roofline, where they cannot be checked from the ground. Others are hidden behind shrubs, under decks, or within the overlap of siding boards. Finding them takes a careful look around the entire house, from the foundation to the roof.

Closing a gap also takes the right material. Mice can chew through expanding foam and some sealants, so openings used by rodents need materials they cannot chew through. Some openings, such as vents, need to stay open for airflow and should be covered with screening instead of sealed shut. Sealing an opening while an animal is still inside the attic can trap it there, which creates a different problem.

Replacing a worn door sweep, trimming shrubs back from the siding, and keeping firewood away from the house all help. A professional inspection is still the way to find the openings you cannot see from the ground and to deal with the pests that have already gotten in.

How Hollenbeck Handles Fall Entry Points

When we inspect a Fishkill home, our technicians look at the exterior from the foundation to the roofline. They identify which pests are active, where those pests are getting in, and how they are moving through the house. From there, we treat the pests that are present and recommend which openings should be closed and how. Depending on the service, Hollenbeck backs its work with warranties ranging from 30 days to one year. For more on preparing your home before winter, read our fall pest-proofing guide for the Hudson Valley.

The gaps that let pests into a Fishkill home in the fall are usually small and spread around the entire house. Request a free quote from Hollenbeck Pest Control to have our technicians find them before colder weather sends more pests inside.