Decontamination service following an extermination of insects or rodents
As a pest decontamination company, we know that it is essential to carry out the complete decontamination of your home or business after an extermination, to protect yourself against diseases.
Because even if all the insects are dead, their droppings and germs remain on your surfaces. The same goes for mice and rats, which leave germs in their urine and feces that can transmit very dangerous diseases.
Decontamination, an essential and too often neglected step for exterminators
To protect yourself against diseases transmitted to humans by insects and rodents, it is important to disinfect places infested by intruders such as rats, mice or other unwanted species that have infested your home or business.
Too often forgotten by exterminators, parasite decontamination is nevertheless crucial in any extermination process.
All species of wild animals, rodents or insects are potential carriers of diseases, viruses or parasites. Their droppings also pollute the air, which can cause serious health problems for the occupants of your home in the medium term.
Mice, rats, and bats carry diseases such as hantavirus, a condition that causes serious lung problems. Simply sweeping or vacuuming after extermination is not enough to remove harmful particles from the ambient air.
This is why it is essential that the premises be restored to their initial state, sanitary and free of all contaminants. Our decontamination company is the solution.
Scope of action for post-infestation decontamination
The decontamination protocols require sustained work on the entire immediate South Shore and the Richelieu Valley. In Longueuil and the South Shore, we mainly decontaminate the attics of triplexes in Old Longueuil contaminated by bat or raccoon droppings. Our service in Brossard mainly treats finished basements affected by prolonged mouse infestations. South Shore decontamination mobilizes our technicians in complete Tyvek equipment on sites of a minimum of one day. In Boucherville, the heritage building on De Montarville Street concentrates histoplasmosis interventions. To the east, we frequently work in Saint-Jean-sur-Richelieu and surrounding areas on buildings in downtown and the former Iberville district. In Saint-Hyacinthe (Maskoutains), regional agri-food plants and CHSLDs ask us for HACCP protocols for post-rodents.
Post-Infestation Decontamination Protocol: Targeted Phases and Pathogens
Decontamination after infestation follows a five-phase protocol, governed by INSPQ recommendations and CNESST standards on bioaerosols. The first phase is the physical containment of the affected area with 6 mil plastic barriers and HEPA negative pressure, which is essential as soon as rodent or bat excrement is treated. The second phase is the HEPA suction of solids with absolute filtration of 0.3 microns, without any sweeping or blowing that would suspend pathogenic particles. The third phase is the application of a virucidal and fungicidal disinfectant registered by Health Canada (DIN active), with a minimum contact time of 10 minutes. The fourth phase is the removal, double bagging and disposal of contaminated materials according to MELCC’s HHW protocols. The fifth phase is the final decontamination of the surfaces with ATP-meter for validation.
The pathogens targeted vary according to the contaminating species. Bat droppings carry Histoplasma capsulatum, a fungus responsible for pulmonary histoplasmosis, which can be serious. Raccoon droppings concentrate the eggs of Baylisascaris procyonis, a zoonotic roundworm that can cause irreversible neurological damage if ingested. The excrement of rodents (mice, rats, field mice) carries hantavirus, salmonellosis, leptospirosis and haemorrhagic fever. The nests of pigeons and starlings concentrate Cryptococcus neoformans and Chlamydophila psittaci. Bird and rodent nest mites persist for several months and can cause dermatitis and asthma. That’s why our technicians wear full protective equipment: class 2 Tyvek suit, P100 half mask, goggles, lined nitrile gloves.
Pathogens by species: health risks and decontamination requirements
| Species | Main | pathogenRoute of transmission | Minimum | PPEValidated disinfectant |
|---|---|---|---|---|
| Bat | Histoplasma capsulatum | Inhalation dust | P100 + Tyvek class 2 | Phenol 5%, hypochlorite 1% |
| Raccoon | Baylisascaris procyonis | Ingestion Resistant Eggs | P100 + Nitrile Gloves Lined | Steam 80°C, Propane Burning |
| Mice, rats, | Hantavirus, Salmonella | inhalation, mucosal contact | P100 + goggles | Hypochlorite 1%, ammonium quat. |
| Pigeons, Starlings | Cryptococcus, Chlamydophila | Inhalation, Skin Contact | P100 + | Glutaraldehyde 2% Dry Suit, Hypochlorite |
| Field mice, voles, | Leptospira, Borrelia | , Urine contact, bite, | P100 ticks + waterproof gloves | Hypochlorite 1%, alcohol 70% |
Decontamination: pricing and deadlines
In Quebec, residential decontamination after infestation is based on an evaluation, depending on the area affected, the pathogen involved and the accessibility of the area. An attic decontamination after a bat colony (10 to 30 m²) varies on evaluation, due to the histoplasmosis requirement and the complete removal of the contaminated insulation. A finished basement after prolonged infestation of mice (30 to 80 m²) is estimated to be high. A crawl space with a raccoon’s nest (5 to 15 m²) is a matter of evaluation, due to the risk of Baylisascaris. The procedure typically lasts between 1 and 4 days depending on the extent. We provide a detailed decontamination report with before/after photos, validation ATP-meter and certificate of compliance that can be used with home insurance companies, which often cover these costs under the heading of vermin damage.
Did you know?
If there have been animals in your home and the place has not been contaminated, all the other animals can sense their former presence and return to the premises.
Smell problem?
Sometimes people call us with an odour problem. Indeed, the passage of a skunk or the smell of putrefaction due to an unresolved extermination problem, can permeate a house for a long time. And this can be excessively unpleasant.

So we have created our own deodorization technique: we use specialized products and install air exchanger systems. Our decontamination company does not leave you with odor problems. We can solve all your problems following a rodent or skunk infestation.
AFTER THE EXTERMINATION AND CAULKING? DECONTAMINATION
Once all the undesirables have been exterminated from the house, and all the entrances have been caulked, it’s time to clean up. Our exterminator technicians have the knowledge and tools necessary to carry out the decontamination effectively and safely. We are able to decontaminate all the rooms in your home, including those that are more difficult to access. We use specialized products, approved techniques, quality tools, all orchestrated by certified technicians!

Our company holds all the necessary permits, licenses and insurance for the professional extermination and decontamination of insects, mice and rats. Our pest decontamination techniques comply with the regulations of the Ministry of the Environment.
Contact us for more information
Contact Nova Extermination, a pest decontamination company on the South Shore that will decontaminate your home or business, if your previous service provider did not do so.
The pest decontamination service will still be offered by our exterminators after all our extermination and caulking work. Contact us to benefit from the services of a decontamination company on the South Shore of Montreal that offers you more.
Contact us at 1-844-880-6682 for quick pest decontamination services, or at 514-MON-NOVA to contact the emergency service or send us an email explaining your situation.
Frequently Asked Questions: Decontamination
What does Nova Extermination’s decontamination service consist of?
Decontamination includes the removal of soiled materials, sanitation and disinfection of premises affected by an animal presence or infestation. It aims to eliminate feces, urine, nests and contaminants that threaten health. Our technicians offer it for attics, crawl spaces and other spaces on the South Shore and in Montérégie.
When is decontamination necessary?
It is necessary after a rodent infestation, occupation by wild animals or an accumulation of excrement in an inhabited or technical space. Traces of urine, persistent odors, and soiled insulation are clear signals. An inspection determines the scope of work in Longueuil or Brossard.
What steps does a complete decontamination entail?
It typically includes removing soiled materials and materials, vacuuming excrement, disinfecting surfaces with approved products, and often closing entry points. Depending on the case, the insulation removed is replaced to restore the building’s performance. Each project is tailored to the nature of the contamination.
Does decontamination really clean the air and surfaces?
The treatment significantly reduces contaminants, allergens and odours on surfaces and in the ambient air. The magnitude of the result depends on the degree of contamination and whether or not the unrecoverable material is removed. Our technicians target the areas to be treated on a case-by-case basis.
Do you offer a warranty on decontamination?
We aim for sustainable results evaluated according to each situation, without promising absolute guarantees on all our treatments. We do not take care of the insalubrity or general dilapidation of a poorly maintained building beyond the treated areas. Our technicians specify the exact scope of the intervention.
How much does a decontamination service cost?
The price is established on the basis of an evaluation, depending on the surface area, the volume of material to be removed and the degree of contamination. An inspection in Montérégie allows for a fair estimate. It is a paid service carried out by RBQ certified technicians.