How to get rid of the smell when a mouse has died under the floor? - briefly
Locate and remove the carcass by probing the floorboards, then clean the affected area with an enzymatic or odor‑neutralising cleaner and ventilate the space until the smell dissipates.
How to get rid of the smell when a mouse has died under the floor? - in detail
A dead rodent hidden beneath floorboards releases volatile compounds that quickly become unpleasant. The first step is to locate the source. Look for discoloration, damp spots, or a concentrated odor near a specific area of the floor. If the floor can be lifted, carefully pry up a board to confirm the presence of the carcass.
Once identified, follow these actions:
- Wear disposable gloves and a mask to avoid direct contact with decomposition fluids and airborne particles.
- Remove the animal with a sealed plastic bag; seal the bag tightly and discard it in an outdoor trash container.
- Clean the cavity with an enzymatic cleaner designed for organic waste. Apply the solution, let it sit according to the product instructions, then wipe the area with a clean cloth.
- Sprinkle a thin layer of baking soda over the exposed surface; let it absorb residual odors for several hours, then vacuum or sweep it away.
- Apply a charcoal or activated carbon filter near the affected spot to absorb lingering smells.
- Increase ventilation by opening windows and using fans to circulate fresh air for at least 24 hours.
- If the odor persists, repeat the enzymatic cleaning and baking‑soda treatment, then consider a commercial odor‑neutralizing spray that contains oxidizing agents such as hydrogen peroxide or ozone‑generating devices used briefly in a well‑ventilated space.
After the area is dry, inspect the surrounding floorboards for signs of mold or rot caused by the decomposition fluids. Replace any damaged boards to prevent future odor issues. Finally, seal the floor with an appropriate sealant or paint to create a barrier that reduces the likelihood of odor penetration should another incident occur.