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Mouse & Rat Extermination

A rodent entering a building never does so by accident: it follows an opening, a source of warmth, and a smell. That is why rodent control turns on reconnaissance rather than product. Our technicians first locate entry points and travel corridors, then place bait where activity actually occurs and seal the building. Without that last step, the population rebuilds within weeks no matter how many individuals were eliminated.

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Mouse or rat: identification changes the whole protocol

A mouse passes through a six-millimetre opening; a rat needs twenty. That single difference determines where to look, what to seal, and with which material. Mice nest high and low alike, inside partitions, floor voids, and insulation; they gnaw in a scattered way and leave three-to-six-millimetre droppings with tapered ends. Rats occupy the bottom of the building — basement, crawl space, drains — and leave two-centimetre droppings with blunt ends. Their routes are fixed and leave grease marks along walls, which makes trap placement easier but also signals an older population. Confusing the two means setting equipment on the wrong floor and sealing openings that were never the right ones.

Sealing: the only part that prevents a return

Baiting settles the population present; sealing settles the problem. We systematically inspect the same zones because they are the ones that fail: service penetrations (water supply, gas, wiring, dryer vent), the joint between foundation and siding, garage door thresholds, ventilation and soffit grilles, and the surround of window wells. Each opening is closed with a material the rodent cannot gnaw through — stainless steel wool, metal mesh, mortar — never expanding foam alone, which is breached in one night. On a typical Greater Montreal home we find between six and fifteen usable entry points, half of them invisible from inside.

Safe baiting, mechanical traps, and sensitive environments

The choice between bait and trap is not ideological, it depends on the location. Outdoors and around the perimeter we use locked, anchored bait stations, inaccessible to children and pets. Inside an occupied dwelling we favour mechanical traps: the rodent dies where it is caught and can be removed, whereas a poisoned rodent often dies inside a closed cavity and makes the space unusable for three to six weeks. In commercial kitchens, daycares, and seniors' residences the protocol is exclusively mechanical and documented. We never place rodenticide bait inside a wall void, whatever the client's pressure.

Real structural damage and health risks

A rodent's incisors grow continuously, forcing it to gnaw constantly. Electrical wiring bears the cost: the sheathing is an ideal material for tooth wear, and exposed conductors inside a closed cavity are a documented fire risk factor. Other common damage includes the compaction of blown-in insulation, which loses its R-value across nesting zones, and leaks caused by gnawed PEX piping. On the health side, urine and droppings contaminate surfaces and food; inhaling them during dry cleaning is the main exposure route. We provide the decontamination protocol — wetting, disinfectant, respiratory protection — because sweeping an infested attic is more dangerous than the infestation itself.

How an intervention unfolds

Free on-site inspection

A certified technician comes on site, identifies the exact species, measures the extent of the infestation, and locates entry points. No obligation, and no price quoted before seeing the site.

Written quote and treatment plan

You receive a document setting out the chosen method, the products used, the number of visits planned, the schedule, and the scope of the guarantee. The price is firm, not indicative.

Treatment and preparation instructions

Preparation instructions are given to you in advance: this is the most underestimated part and the one that decides the outcome. Treatment is then applied with Health Canada-approved products.

Follow-up visit and guarantee

One or two check visits verify the outcome, scheduled against the species' reproductive cycle rather than on a fixed date. If activity resumes within the covered period, we return at no charge.

Mouse & Rat Extermination by area

We work across Greater Montreal. Choose your area to see local specifics and lead times.

Identification Guide — 21 pages, free

Five actual-size plates to print and set beside what you found: droppings (mouse, rat, squirrel, bat, cockroaches), eleven insects, and the full bed bug life cycle from egg to engorged adult. Plus an identification key, the twelve inspection points of a building, and the Greater Montreal seasonal calendar.

Download the PDF No sign-up required · PDF, 21 pages

Worth reading before you call

June 9, 2026

Noises in the Walls at Night: Mouse, Rat, Squirrel, or Something Else?

The time of the noise, its height in the wall, and its rhythm are almost always enough to identify the animal. Here is how to read those three clues.

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July 21, 2026

Preparing Your Home for a Bed Bug Treatment: the Complete Checklist

Preparation determines the outcome more reliably than the product used. Here is what to do, in what order, and the three mistakes that sink a correct treatment.

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July 7, 2026

Cockroaches in an Apartment Building: Who Does What, and Why Treating One Unit Fails

In a plex or a block, a cockroach is never an individual problem. Here is the real division of responsibilities and the only protocol that produces lasting results.

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Frequently Asked Questions

How long does it take to eliminate a mouse infestation?

Seven to fourteen days for active elimination in a typical home, with a check visit two to three weeks later. Sealing is done during that period. A longer timeline almost always indicates a missed entry point rather than an ineffective product.

Does a cat solve the problem?

No. A cat takes a few individuals at the edges but never reaches nests inside partitions and closes no entry point. In several cases its food left on the floor becomes an attraction source that stabilizes the population.

Is sealing included in the price?

Locating entry points always is. The sealing itself is quoted separately based on the number of openings and their accessibility, and it appears on the quote before any work begins. We never bill for sealing that was not discussed beforehand.

What about dead rodents in the walls?

That is exactly the scenario our protocol avoids by favouring mechanical traps indoors. If the situation already exists, we locate the source by odour and thermal survey and make a targeted opening, as small as possible, followed by disinfection and repair.

Need mouse & Rat Extermination?

Free inspection, response in under 2 hours.

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