Lancaster’s cold winters send mice into homes for warmth and food. Mice don’t hibernate; as temperatures dip below freezing, they actively seek sheltered spots, such as attics, basements, and wall voids. Older homes in Lancaster with cracks in foundations and walls provide easy entry points for mice, and our rural surroundings mean rodents from barns or fields may wander indoors. In winter, mice enter homes to nest and breed.
Signs of a Mouse Infestation
Watch for these warning signs that mice are already in your home:
- Droppings: Tiny dark pellets (about the size of black rice) found near food packages, in drawers, or along baseboards.
- Gnaw marks: Chewed cardboard, plastic, or wood on food boxes, bags, or furniture.
- Nests: Shredded paper, fabric, or insulation wads hidden in quiet spots. These are commonly found behind appliances, in attics, or in stored boxes.
- Noises: Scratching or scampering sounds inside walls, ceilings, or under floors are usually heard at night.
- Pet behavior: Cats or dogs pawing/scratching at walls or cupboards.
- Strange odor: A strong musty or ammonia-like smell can indicate a nest behind walls.
If you notice any of these signs, act quickly, as mice reproduce fast; a few can turn into dozens in one season.
Seal Entry Points
To keep mice out, thoroughly inspect and seal your home:
- Check for small gaps: Mice can squeeze through holes as small as ¼ inch (the thickness of a pencil). Check around the foundation, plumbing or cable entry points, dryer vents, attic and roof edges, and gaps under doors.
- Secure doors and windows: Install or repair weather-stripping on exterior doors (including garage doors) and repair torn screens. Don’t leave your doors propped open – a short period of time with the door open can let a mouse inside.
- Inspect older construction: Lancaster’s historic brick and stone homes often have cracks. Pay special attention to any gaps around stone foundations or between bricks.
- Have your home professionally sealed: Contact a professional animal removal technician for a thorough inspection to find any openings. Post inspection, we’ll seal any potential entry points.
Humane Trapping and Removal
If you still have mice indoors, we recommend using trapping removal methods rather than poisons. Poisons can cause mice to die in walls, leading to odors and costly repairs. Using traps is generally the most effective and humane way to eliminate existing mice.
Once the mice are removed, we offer repair and remediation services for sealing up any potential entry points, repairing damages, and cleaning up any hazardous droppings or nesting materials.
Lancaster’s Winter and Homes
Local factors matter. Lancaster’s winter weather brings frequent freezes, which makes outdoor life perilous for mice, so they press indoors for shelter. Many Lancaster homes are older brick or stone constructions, which often have small cracks and gaps that allow mice to slip through. Additionally, Lancaster County’s large amount of rural and agricultural surroundings can host field mice that move into houses when snow covers the ground. Understanding these specifics – cold weather, historic foundations, and nearby farmland – helps you know where to look first when proofing your home.
When to Call a Professional
If your mouse problem persists despite your best efforts, it’s time to call a Lancaster-area pest control service. Animal removal technicians have the training and tools to professionally catch hidden mice and seal entry points. We use targeted traps and exclusion methods, offering customized plans to protect your home. Signs like hearing scampering or finding droppings are the time to call an expert. Getting professional help early can save on long-term damage; every week mice stay in your walls, they contaminate insulation, chew wiring, and breed more offspring.
In summary, Lancaster homeowners can outsmart winter mice by acting proactively: seal up any entry points, keep things clean, use traps, and call for help if needed. With these steps, you can successfully get rid of mice in Lancaster and keep them out all winter long.

