When rats die in the walls of a house, this will usually mean the only way to remove the scent is to tear into the walls to remove the corpse(s). This should be done with the upmost care and once the decaying animal has been removed, it should be placed into a sealable bag for disposal.
Unfortunately it may take three weeks or more to completely decompose. A professional may be contacted to break through and rebuild affected walls. This can be costly and not a viable option. Even after elimination of the source of dead rodent smell, the unsettling scent may linger for up to two weeks.
It may take days or weeks for the carcass to dry out and the odor to naturally and completely disappear. Humidity can affect the process and make the nauseating odor even more intense. So, if a rat dies near steam pipes or other moist areas in your home or car, it may be "ripe" for a long time.
On average, a rat takes roughly 2-3 weeks to decompose; however, lower temperatures will increase this time period significantly. Once the body has decomposed, the smell won't instantly leave your home. Instead, the foul smell will still be lingering in your home roughly two weeks later.
Typically, a dead rodent — mouse, rat, squirrel or other — will emit a foul odor for a week to a couple of weeks.
A dead mouse should not be left to rot inside your wall, because its corpse could soon attract fleas. With an electronic borescope, you can locate the corpse's whereabouts by drilling a coin-sized hole, a few inches off the ground, into the drywall of the cavity that seems to be emitting the smell.
Try deodorizing with baking soda, charcoal, or pet odor enzymatic sprays. You may also use a combination of deodorizing and sanitizing solutions. Create a 10/90 bleach/water mixture. Vinegar or commercial disinfectants are also good choices.
Dead rats present a high risk of dangerous diseases and bacteria that affect the air you breathe and could cause health complications.
Mouse and rat carcasses release a potent odor that can penetrate through air ducts, walls and floors. The stench is so strong that it can cause headaches, nausea, and vomiting. As it turns out, there are two main culprits: decomposition and bacteria.
Rats are social creatures, which means that if you find one dead rat, there are likely more living rats somewhere nearby.
Baking Soda
Household kitchen ingredients are great for removing such a foul scent. Mixing baking soda with water and placing the solution into a spray bottle that you can spray the area where the dead rodent was found is your best bet.
Not only will that corpse smell horrific enough to make people sick, but it can also attract more pests, including other rats.
'To smell a rat' is a phrase which means to suspect that something is wrong in a particular situation. E.g. They called in the police for the murder case who soon smelt a rat.
The smell of a dead rat can be harmful to a person's health due to the toxic gases and microscopic compounds of the dead animal that are constantly being released into the indoor air. Since most homes are not consistently ventilated, the gases permeate into the respiratory tract and can potentially cause illness.
Dead Rats Will Attract Maggots and Flies
One of the most obvious and disgusting side effects of dead rats is the proliferation of maggots and flies. Maggots are the larval form of a fly, and they will feast on rotting flesh. If you have a dead rat in your home, you can expect to see an influx of these pests.
Rodents such as rats and mice are associated with a number of health risks. In fact, rats and mice are known to spread more than 35 diseases. These diseases can be spread to humans directly through handling of live or dead rodents, contact with rodent feces, urine, or saliva, as well as rodent bites.
Rats will eat pretty much anything that they come across - including carcasses.
The underlying principle is as follows: Certain species of flies lay their eggs in the tissue of a corpse as early as one to two hours after death. A few days later, maggots hatch and grow in size with each passing day.
Start by opening all windows and placing bowls of odor-absorbing coffee grinds, baking soda, or charcoal briquets throughout the house. Replace materials in bowls every one to two days until the odor is gone.
Step 1: Wear rubber or plastic gloves. Step 2: Spray the dead rodent, nest, and surrounding area with a disinfectant. Let it soak for 5 minutes or according to instructions on the disinfectant label.
Rat Sorb is an odor-neutralizing product used mainly to eliminate dead rat or mouse smells which may be coming from inside walls, attics and other hard to reach areas.
Rats and rodents in general are very sensitive to sound, since it's one of their main tools for survival. Any new or unexpected noise will frighten them and send them scurrying. However, once rodents get used to a sound, they will no longer fear it.
Stick your nose on the drywall, and go back and forth, narrowing it down. When your nose gets within a foot of the carcass, the odor will change - it will be obvious. Use a drill and drywall or keyhole saw to cut a hole in the wall. Wear gloves, and bag the rat carcass and throw out!