The dangers of rats in Montreal: protect your home

Rodent reports are climbing sharply in Quebec’s largest city. Calls to the 311 line about the presence of rats topped 1,700 in 2024, a worrying increase compared with previous years. Faced with the dangers of rats in Montreal and this urban spread, contacting a Rat Exterminator in Montreal has become an essential step to keep your household safe.

Why is our city so vulnerable? The answer lies in a combination of urban factors. Aging infrastructure offers these animals an ideal playground. On top of that, massive construction sites disturb the sewers and underground conduits. Rodents are then forced back up to the surface to look for new shelter. Your basements, the walls of your duplexes and the attics of your triplexes become warm refuges with abundant food sources.

This article explores the silent threat hanging over homes in very dense neighbourhoods such as Plateau-Mont-Royal, Rosemont and Hochelaga-Maisonneuve. You will discover the species prowling near your home, the real risks to your health and your property, as well as the professional methods used to get rid of them for good.

Know your enemy: the types of rats in Montreal

To fight a pest effectively, you first have to know it. Two main species share Montreal’s urban territory, each with very distinct behaviours.

The brown rat (sewer rat)

Also known as the Norway rat, the brown rat is the most common specimen in Quebec. It has a stocky body, greyish-brown fur and a tail shorter than its body. This rodent prefers to stay close to the ground. It digs burrows under foundations, travels through the sewers and often gets in through damp basements.

The black rat (roof rat)

Slimmer and more agile than the brown rat, the black rat stands out for its dark fur and its very long tail. It is an excellent climber. It usually gets in through the high points of buildings, such as cornices, roofs and trees overhanging houses. It tends to nest in attics and crawl spaces.

The real dangers of rats in Montreal

These animals are not simply unwanted visitors. Their presence leads to serious consequences on several fronts.

Health risks

Rats are formidable carriers of pathogens. They transmit many diseases to humans through their droppings, their urine or direct contact. Salmonellosis is commonly spread when rodents touch our kitchen surfaces. Leptospirosis, a serious bacterial infection, can also be contracted from rat urine.

Major property damage

A rat’s teeth grow continuously. To file them down, it has to gnaw on everything it finds. This physiological need is devastating for a home. These rodents attack wood, plastic, plumbing pipes and insulation. Worse still, they chew through the electrical wires hidden inside your walls. This causes short circuits and is a major cause of unexplained house fires.

Food contamination

A rat visits dozens of filthy places before making its way into your pantry. By piercing packaging with their teeth, they soil your food supplies. A small family of rodents can destroy your provisions in just a few nights, leading to financial losses and significant waste.

Recognizing the signs of an infestation

Rodents are nocturnal and discreet creatures. You will often notice the traces they leave behind long before you ever come face to face with the animal. Watch for the following clues:

• Droppings: Small dark pellets, shaped like an elongated grain of rice, clustered along walls or under sinks.
• Night-time noises: Scratching, quick scurrying or squeaking coming from your walls or your ceiling during the night.
• Gnaw marks: Fresh tooth marks on baseboards, exposed wires or food boxes.
• Lingering odours: A strong ammonia smell caused by urine building up in confined spaces.
• Nests: Piles of shredded materials (paper, cardboard, mineral wool) in the dark corners of the basement or the crawl space.

Why do-it-yourself solutions are not enough

At the first signs, the instinctive reaction is often to buy traps or poisons at the local hardware store. Unfortunately, this approach has serious limits.

Traditional traps never solve the problem at its source. They catch one or two isolated individuals while the colony keeps growing out of sight. A rat’s reproduction rate is staggering. A single female can give birth to several dozen young every year. A minor infestation gets out of control in just a few months.

Using commercial poisons without any training also poses an immense safety risk. Poorly placed bait can be swallowed by your pets or by young children. On top of that, a poisoned rat will go and die inside an inaccessible wall, releasing a foul smell for weeks.

The SOS Extermination professional approach

To solve the problem for good, experts use proven, safe and regulated methods. The SOS Extermination team follows a rigorous process to eliminate the threat.

A state-of-the-art inspection

Before setting a single trap, the technicians carry out a complete analysis of the building. They use thermal cameras to detect the body heat of rodents hiding behind the drywall or under the floors. This step makes it possible to target the nests precisely without damaging your home.

Tailored and compliant treatments

Every home requires a unique action plan. The experts deploy strategies combining secured bait, strategically placed mechanical traps and products approved by Health Canada. The treatment is designed to protect the occupants of the home, whether they are infants or pets.

Exclusion and long-term prevention

Killing the rats that are present is only part of the job. If the openings stay accessible, new specimens will take over. Professionals identify and seal the access routes, closing up foundation cracks and securing air ducts.

Preventing future intrusions

You can adopt simple habits to make your home less attractive to urban wildlife.

• Block access points: Seal the holes around plumbing and install sturdy screens over air vents.
• Manage your waste: Use garbage bins with airtight lids. Do not leave garbage bags sitting outside before collection day.
• Protect your food: Transfer your dry goods into glass or rigid plastic containers. Do not leave your pets’ food in bowls overnight.
• Eliminate moisture: Repair plumbing leaks and dehumidify your basement. Rats need constant access to water to survive.

When should you contact an exterminator?

Do not wait until you see a rat running across the middle of your living room in broad daylight. When that happens, it usually means the colony has grown so large that individuals are running out of space or food in their hiding places.

As soon as you hear repeated scratching inside the walls or you find fresh droppings, it is time to act. A quick intervention costs far less than the electrical or structural repairs caused by months of gnawing.

Secure your Montreal home for the long term

Living alongside rodents is not a viable option. The risk of bacterial disease transmission, combined with the danger of electrical fires, calls for an immediate and decisive response. The makeshift solutions sold in stores often provide a false sense of security.

If you suspect the presence of rodents in your home, call on qualified specialists. With more than 20 years of experience, modern technology and environmentally responsible methods, SOS Extermination is equipped to solve your problem for good. Take back control of your home today and ensure a healthy environment for your family.