How Do You Know If You Have Mice?
Mice are nocturnal and discreet animals. They can live in your home for weeks before you notice their presence. Here are the most common signs of a mouse infestation in Montreal:
- 1.Mouse droppings — Small black droppings, 3 to 8 mm, rice-shaped. Often found along walls, under sinks, in kitchen cabinets, and near food sources. A single mouse can produce 50 to 75 droppings per day.
- 2.Scratching noises — Scratching, scurrying, or gnawing sounds in walls, ceilings, or under floors, especially at night. Mice are most active between midnight and dawn.
- 3.Gnaw marks — Mice must constantly gnaw to wear down their continuously growing teeth. You will find marks on electrical wires, wood, plastic, cardboard, and even aluminum. Damage to electrical wiring poses a real fire hazard.
- 4.Musky smell — Mice produce strong, musky-smelling urine. This odor intensifies with colony size and can permeate insulation materials in walls and attics.
- 5.Rub marks — Mice always follow the same paths, leaving dark, greasy marks along baseboards and walls. These marks are caused by the natural oils in their fur.
Important: If you see a mouse during the day, it is generally a sign of an advanced infestation. Mice only come out during daylight when the population is too large and they are forced to search for food outside their usual hours.
What Is the Difference Between a Rat and a Mouse?
Although often confused, rats and mice are distinct species that require different extermination approaches. In Montreal, the two most common species are the house mouse (Mus musculus) and the Norway rat (Rattus norvegicus).
| Characteristic | Mouse | Rat |
|---|---|---|
| Size | 5 to 10 cm (body) | 20 to 25 cm (body) |
| Weight | 15 to 30 g | 200 to 500 g |
| Droppings | 3-8 mm, rice-shaped | 15-20 mm, capsule-shaped |
| Reproduction | 6-10 litters/year, 5-6 pups | 4-6 litters/year, 8-12 pups |
| Behavior | Curious, exploratory | Cautious, avoids novelty |
This behavioral difference is crucial for treatment. Mice, curious by nature, readily approach new traps. Rats, neophobic, avoid any new object in their environment for several days. A professional exterminator adapts their strategy accordingly.
Think you have rodents in your home?
Do not wait for the infestation to worsen. A single mouse can give birth to over 60 pups per year. Contact us for a free inspection.
Why Do Rodents Enter Your Home?
Rodents do not settle in your home by chance. Three factors attract them: food, warmth, and a safe shelter for reproduction. In Montreal, fall and winter are the most critical seasons as mice and rats seek to escape the cold.
Most Common Entry Points
A mouse can squeeze through a hole as small as a dime (6 mm). A rat needs an opening of about 20 mm. Here are the areas to monitor:
- Joints between the foundation and exterior siding
- Openings around plumbing pipes and electrical conduits
- Cracks in concrete foundations
- Damaged door thresholds and window frames
- Unscreened vents
- Holes around gas meters and AC fittings
- Worn garage door seals
Health Risks
Rodents carry numerous diseases transmissible to humans. The house mouse contaminates surfaces with its urine and droppings, potentially transmitting salmonellosis, hantavirus, and leptospirosis. Additionally, rodents can carry fleas, ticks, and mites that pose additional risks to your family and pets.
Property damage is also considerable. Rodents gnaw on electrical wires (fire risk), pipes (water damage risk), insulation, and wooden structures. Repairs can cost thousands of dollars if the infestation is not treated promptly.
How to Get Rid of Mice Permanently?
Getting rid of mice requires more than setting a few traps. Temporary solutions like snap traps or over-the-counter baits do not solve the root problem. For permanent elimination, you need to combine three approaches: identifying entry points, professional sealing, and an adapted trapping or baiting program.
Traps: Advantages and Limitations
Snap traps and glue traps catch individual mice but do not solve the root problem. If entry points remain open, new mice will continue to enter. Moreover, trap placement is an art: they must be placed perpendicular to walls, in mouse travel paths, with the right bait in the right location.
Why DIY Solutions Are Not Enough
Ultrasonic repellers, peppermint oil, and natural solutions sold at hardware stores have very limited effectiveness according to scientific studies. Mice quickly adapt to ultrasonics, and essential oils evaporate within hours. Only a professional approach combining exclusion and active treatment provides permanent results.
Our Rodent Extermination Methods
Our rodent extermination protocol has been developed and refined over years of experience in Montreal. Each intervention follows a rigorous five-step process that guarantees complete elimination and return prevention.
Complete Inspection
Our technician inspects your entire property, from basement to attic. We identify travel paths, nests, food sources, and all potential entry points. We use smoke tests to detect openings invisible to the naked eye in walls and foundations.
Entry Point Sealing
We seal all identified entry points with rodent-resistant materials: steel wool, metal mesh, cement, metal-reinforced expandable foam. Each opening is permanently sealed to prevent any return.
Trapping and Baiting Devices
We install a strategic network of traps and secured bait stations to eliminate rodents already inside. Bait stations are locked and secured, inaccessible to children and household pets. Products used are Health Canada-approved.
Cleaning and Disinfection
We clean and disinfect areas contaminated by rodent droppings and urine. This step is essential to eliminate health risks and the pheromones that attract other rodents.
Follow-Up and Guarantee
We perform one or more post-treatment follow-ups to verify the effectiveness of the intervention. All our treatments are covered by a written 60 to 90-day guarantee. If rodents return during the warranty period, we intervene again at no charge.
Ready to eliminate rodents for good?
Free quote, fast response, written guarantee. Our certified technicians are available 7 days a week.
Why Hire a Professional Exterminator?
Hiring a professional exterminator like 514 Extermination offers significant advantages over DIY solutions:
Accurate Diagnosis
Our technicians identify the exact species, infestation severity, and all entry points through training and professional tools like smoke tests.
Professional Products
We use products and equipment not available to the public, Health Canada-approved, more effective and safer.
Written Guarantee
Each treatment is covered by a written 60 to 90-day guarantee. If rodents return, we come back at no extra charge.
Regulatory Compliance
We hold all permits required by Quebec's Ministry of Environment and are members of the AQGP (Quebec Pest Management Association).
Rodent Prevention Tips
After treatment, here are the best practices to prevent rodent return:
- Store food in airtight glass or metal containers
- Do not leave pet food accessible at night
- Keep your kitchen clean and wipe surfaces every evening
- Take out garbage regularly and use bins with lids
- Eliminate clutter in the basement, garage, and attic
- Trim vegetation at least 30 cm from house walls
- Inspect the exterior of your home every fall to detect new openings
- Store firewood away from the house and elevate it off the ground
Indicative Pricing
350$ — 1 200$
Depending on infestation severity and property size. Free on-site quote.