What should I do if mice have infested the insulation? - briefly
Seal all gaps and set traps to eliminate the rodents, then remove and replace any contaminated insulation while thoroughly cleaning the area. Inspect the space regularly afterward to prevent a recurrence.
What should I do if mice have infested the insulation? - in detail
Mice nesting in wall or attic insulation create health hazards, damage to wiring, and reduced thermal efficiency. Prompt action prevents escalation.
First, confirm the presence of rodents by looking for droppings, gnaw marks, shredded material, and audible activity. Use a flashlight to inspect cavities, especially near entry points such as vents, gaps around pipes, and foundation cracks.
Remove contaminated insulation promptly. Wear disposable gloves, a mask, and protective clothing. Cut out affected sections with a utility knife, place the material in sealed bags, and dispose of it according to local regulations. Clean the exposed area with a disinfectant solution to eliminate pathogens.
Seal all possible entry routes before reinstalling new insulation. Apply steel wool or copper mesh to small holes, then cover with expanding foam or cement. For larger openings, install metal flashing or hardware cloth. Ensure doors, windows, and vents have tight-fitting screens.
Replace insulation with a mouse‑resistant type, such as mineral wool or foam board, which is less attractive for nesting. Fit the new material tightly to eliminate voids where rodents could hide.
Implement preventive measures: keep outdoor vegetation trimmed away from the building, store firewood at least two feet from the foundation, and eliminate food sources by securing garbage cans and cleaning crumbs. Regularly inspect the exterior for new gaps after storms or renovations.
If the infestation is extensive, if wiring has been compromised, or if you lack the tools for safe removal, contact a licensed pest‑control professional. They can perform thorough eradication, verify structural integrity, and provide a long‑term exclusion plan.