What should be done if mice are behind drywall? - briefly
Locate and seal all entry points, then install appropriate traps inside the wall cavity and check them regularly. If the problem continues, engage a licensed pest‑control professional to eradicate the rodents and repair any damage.
What should be done if mice are behind drywall? - in detail
Mice hidden inside wall cavities create structural damage, fire‑hazard risks, and health concerns. Address the problem with a systematic approach.
First, locate the infestation. Listen for scratching or scurrying noises, especially at night. Look for droppings, gnaw marks, or shredded insulation near baseboards, vents, and electrical outlets. Use a flashlight to inspect any accessible openings in the drywall.
Second, identify and block entry points. Examine the exterior of the building for gaps around utility lines, vents, and foundation cracks. Seal openings with steel wool, copper mesh, or concrete, then cover with caulk or expanding foam. Inside, install steel‑wool‑filled foam strips around pipes and wiring that pass through walls.
Third, choose an elimination method. For immediate control, set snap traps or electronic traps directly in the wall cavity if an access panel exists. Bait with peanut butter, chocolate, or commercial rodent attractant. Position traps perpendicular to the wall, with the trigger end facing the expected travel path. For larger infestations, consider hiring a licensed pest‑control professional who can apply bait stations or conduct targeted rodenticide placement while complying with safety regulations.
Fourth, remove dead rodents and debris. Wear disposable gloves and a mask, then collect carcasses and droppings in sealed bags. Disinfect the area with a solution of 1 part bleach to 10 parts water, allowing the surface to remain wet for at least 10 minutes before wiping clean. Replace any damaged insulation or drywall sections after thorough drying.
Fifth, implement long‑term prevention. Maintain a clean environment by storing food in sealed containers and promptly cleaning spills. Trim vegetation and remove debris within two feet of the building to eliminate shelter. Schedule periodic inspections of the exterior and interior for new gnaw marks or entry points, and repair any damage immediately.
By following these steps—detection, sealing, trapping or professional treatment, sanitation, and preventive maintenance—rodent activity behind interior walls can be eliminated and future incursions prevented.