What to do if there are mice behind the walls? - briefly
Identify and block all gaps where rodents can enter (using steel wool, caulk, or mesh), then place snap or live traps in reachable spots near the suspected area; if activity continues, contact a pest‑control professional for thorough removal and prevention.
What to do if there are mice behind the walls? - in detail
Rodents nesting inside wall cavities create noise, damage, and health risks. Identify the infestation by listening for scratching or scurrying sounds, spotting droppings near baseboards, or noticing gnaw marks on insulation and wiring. Use a flashlight and a small inspection hole to confirm activity without disturbing the animals.
First, isolate the affected area. Turn off electricity to prevent accidental contact with exposed wires. Seal any obvious openings with steel wool or copper mesh, then cover them with caulk or expandable foam. This blocks further entry while allowing a safe environment for removal.
Next, choose an appropriate control method. Snap traps positioned against interior walls capture mice efficiently; place them perpendicular to the wall surface, baited with peanut butter or cheese. For less visible infestations, consider live‑catch traps placed in wall voids, checking them frequently to prevent suffering. Avoid poison in enclosed spaces, as it may contaminate insulation or create dead‑animal hazards.
After capture, clean the cavity thoroughly. Remove shredded insulation, debris, and droppings using disposable gloves and a HEPA‑filtered vacuum. Disinfect surfaces with a solution of one part bleach to nine parts water, allowing contact time of at least ten minutes before wiping dry.
Finally, implement long‑term barriers. Inspect exterior siding, foundation cracks, and utility penetrations for gaps larger than ¼ inch; seal them with cement, metal flashing, or weatherstripping. Maintain a tidy interior by storing food in sealed containers, regularly disposing of trash, and keeping clutter away from walls. Periodic inspections will detect new activity early, preventing recurrence.