What should I do if mice appear in the cellar? - briefly
Identify and seal all openings that allow rodents to enter, then deploy snap traps or humane catch‑and‑release devices and keep the cellar dry and free of food debris.
What should I do if mice appear in the cellar? - in detail
If you discover rodents in the basement, begin with a thorough inspection. Walk the area and note all visible signs—droppings, gnaw marks, gnawed food packaging, and nesting material. Identify every possible entry point: gaps around pipes, cracks in foundation walls, gaps under doors, and openings around utility penetrations. Measure each opening; any gap larger than ¼ inch can admit a mouse.
Next, eliminate access. Use steel wool, copper mesh, or expanding foam to seal small holes; apply concrete or masonry sealant for larger cracks. Install a door sweep on any basement entry door and ensure the threshold is tight. Repair damaged vents with metal flashing and cover vent openings with hardware cloth of ¼‑inch mesh.
After sealing, reduce attractants. Store food in airtight containers, clean up spills immediately, and remove debris or cardboard boxes that can serve as nesting sites. Keep the basement dry; fix leaks, improve ventilation, and use a dehumidifier if humidity remains above 50 %.
Implement control measures. Choose a method that matches the infestation level:
- Snap traps – place along walls, behind objects, and in active runways; use bait such as peanut butter or chocolate.
- Live‑capture traps – set in the same locations; release captured rodents at least 2 miles from the property.
- Electronic traps – deliver a quick, humane kill; position as with snap traps.
- Bait stations – use only where children and pets cannot access; follow label instructions and monitor regularly.
Check traps daily, dispose of dead rodents with gloves, and reset devices until no further activity is observed for at least three consecutive nights.
If activity persists despite sealing and trapping, or if the infestation appears extensive, contact a licensed pest‑control professional. Experts can perform a detailed audit, apply rodenticides safely, and provide a long‑term management plan.
Finally, maintain vigilance. Conduct quarterly inspections of the basement’s perimeter, keep the area clean and dry, and promptly repair any new openings. Consistent preventive actions will keep the space free of future rodent incursions.