What should you do if a mouse is scratching under the floor? - briefly
Identify the exact location of the activity and seal any openings in the floor. Deploy appropriate traps or contact a pest‑control professional, then repair the area to prevent further intrusion.
What should you do if a mouse is scratching under the floor? - in detail
If you detect a rodent moving beneath the flooring, take immediate, systematic action to eliminate the infestation and prevent damage.
First, locate the source. Listen for consistent scratching or scurrying noises, then inspect visible gaps, vent openings, and any access points around the perimeter of the room. Use a flashlight to examine baseboards, under cabinets, and the space behind removable panels. Mark every opening that could permit entry.
Second, seal entryways. Apply steel wool or copper mesh to small cracks, then cover with expanding foam or caulk. For larger openings, install hardware cloth (¼‑inch mesh) secured with screws. Ensure doors and windows close tightly; fit weather‑stripping where needed.
Third, set traps. Choose a combination of snap traps and live‑capture traps positioned along walls, behind furniture, and near identified pathways. Bait with peanut butter, chocolate, or dried fruit for maximum attraction. Check traps daily, dispose of dead rodents according to local regulations, and release captured live animals far from the property.
Fourth, employ deterrents. Place ultrasonic repellers in the affected area; these emit frequencies uncomfortable to rodents but inaudible to humans. Sprinkle peppermint oil or mothballs in concealed corners; both emit strong odors that rodents avoid.
Fifth, clean and sanitize. Remove food residues, crumbs, and pet feed from the floor and countertops. Store dry goods in sealed containers. Vacuum thoroughly to eliminate droppings, urine, and scent trails that may encourage further activity. Disinfect surfaces with a bleach solution (1 part bleach to 9 parts water) after removal of debris.
Sixth, monitor progress. Maintain traps for at least two weeks after the last capture to confirm that activity has ceased. Re‑inspect sealed openings weekly for any new breaches.
Finally, consider professional assistance if the problem persists beyond a month, if damage to structural components is evident, or if you encounter signs of disease (e.g., large droppings, nesting material). A licensed pest‑control operator can provide comprehensive removal, advanced sealing techniques, and ongoing prevention plans.