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Professional Exterminator – Extermi Pro in Montreal
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Ants Chomedey (LavalLocal prevention and sustainable solutions without recurrence

For Extermi Pro Team · April 6, 2026 · Updated: April 14, 2026
Professional Extermination Service Montreal – Extermi Pro

Controlling an ant infestation in Laval isn't enough – you need to prevent their return. Local conditions (climate, building type, environment) play a decisive role in recurring infestations. Sustainable prevention relies on simple yet essential actions.

In short: Ant prevention in Laval involves sealing entry points, managing moisture, proper food storage, and seasonal preventative treatment for at-risk areas.


Laval: why are the ants are frequent here

The Laval neighborhood has characteristics that encourage the presence of ants. The density of housing, the age of the buildings, and the proximity to green spaces or water bodies create a favorable environment. Duplexes built before the 1980s often have gaps in their foundations and around plumbing that pests exploit.

Our certified technicians regularly work in Laval and are familiar with the specific characteristics of local buildings. This on-site knowledge allows us to adapt each intervention to the real conditions of your home.


What our technicians observant in Laval

During our regular interventions in Laval, our certified technicians observe recurring situations related to ants:

  • Buildings constructed before 1980 systematically have multiple entry points at the foundation and plumbing levels.
  • Recently renovated buildings are not immune—the work sometimes creates new openings that are overlooked
  • The proximity of green spaces, alleys, or food stores significantly increases the risk of infestation.
  • Partially treated infestations (without sealing) return in 80% of cases within the following 3 months

Measures of prevention effective

To protect your home in Laval from ants, take these preventive measures recommended by our technicians:

Clogging: Seal all openings larger than 6 mm around plumbing, foundations, and window frames with steel wool and caulk.

✅ Food Storage: Store all food in airtight glass or rigid plastic containers

Waste Management: Take out the trash regularly and use containers with airtight lids

Humidity control: Repair leaks, ventilate bathrooms, and use a dehumidifier in the basement if necessary.

✅ Seasonal Inspection: Check entry points before each fall, especially after renovations.


When to call a professional certified

Certain situations in Laval absolutely require the intervention of a certified pest control professional:

  • Recurring signs: The ants are back despite your prevention efforts — the source has not been identified
  • Multi-unit building A coordinated approach is needed to handle multiple units simultaneously.
  • Presence of children or animals: Only professional products approved by Health Canada guarantee safe application.
  • Structural damage: Ants that damage wood, insulation, or wiring require thorough diagnosis.

Our certified technicians provide service in Laval and surrounding areas with methods adapted to each type of building. Consult our page Laval to learn more.


People are asking also

The carpenter ants Does it eat wood?

No, unlike termites. They tunnel into damp wood to build their galleries and nests. The fine sawdust (frass) you find is excavated, undigested wood.

How to differentiate carpenter ants and pavement ants?

Carpenter ants are large (6-13 mm), black, and leave sawdust. Pavement ants are small (3-4 mm), dark brown, and nest outside in concrete cracks.


Resources for your neighborhood

Check out our page Pest control services in Laval for more information on interventions in your sector.

We also operate in Villeray, Rosemont, Plateau Mont-Royal, Hochelaga-Maisonneuve, NDG.

Related articles about ants

  • Carpenter Ants in Saint-Laurent: May Swarming and Complete Action Plan
  • Ant spray on the plateau: why it often worsens the problem
  • Carpenter ants in wood in Ahuntsic: recognizing structural damage

Frequently asked questions

When should you take action against ants in Chomedey?
From the first traces in spring or indoors, especially near baseboards and windows. Prompt action prevents infestation in walls.
How to recognize ants in the walls?
Repeated presence at the same entry points, activity along baseboards, and possible debris accumulation near moldings.
Are carpenter ants common in Laval?
Yes, especially in damp wooden structures. They benefit from leaks and old woodwork.
Here are some things you can do to prevent an infestation in a plex building: **General Prevention:** * **Maintain Cleanliness:** Regularly clean and vacuum all common areas and individual units. Pay attention to kitchens and bathrooms, where food crumbs and moisture can attract pests. * **Proper Waste Management:** Use sealed trash cans and ensure they are emptied regularly. Keep dumpster areas clean and well-maintained. * **Inspect Incoming Items:** Check delivered packages, furniture, and groceries for any signs of pests before bringing them inside. * **Seal Entry Points:** Seal cracks and crevices in walls, foundations, and around pipes and windows with caulk or sealant. Pests can squeeze through tiny openings. * **Address Moisture Issues:** Repair leaky pipes, faucets, and roofs promptly. Pests are attracted to water sources. Ensure good ventilation in bathrooms and kitchens. * **Educate Tenants:** Inform tenants about the importance of cleanliness, proper food storage, and reporting any pest sightings immediately. Provide them with a clear point of contact for pest concerns. **Specific to Multi-Unit Buildings (Plex):** * **Integrated Pest Management (IPM) Program:** Implement a proactive IPM strategy. This involves regular inspections by pest control professionals to identify and address potential problems before they become major infestations. * **Regular Inspections:** Schedule routine inspections of common areas, basements, attics, and around the exterior of the building. * **Communication with Tenants:** Encourage tenants to report any signs of pests (droppings, gnaw marks, live insects or rodents) immediately to management. This early detection is crucial. * **Rodent Proofing:** Ensure that dumpster lids are secure, and that any openings in the building's exterior are sealed. Consider rodent-resistant materials for repairs. * **Insect Proofing:** Seal gaps around doors and windows. Use weather stripping. Consider keeping vegetation trimmed around the building's foundation. * **Storage Areas:** Keep storage areas clean, organized, and free of clutter. Regular inspections of these areas are important. * **Coordinate Treatments:** If a pest problem is identified in one unit, it's crucial to coordinate treatment with neighboring units to prevent pests from simply moving to another location. **If You Suspect a Problem:** * **Act Quickly:** Do not delay in addressing any suspected pest activity. The sooner you act, the easier and less expensive it will be to resolve. * **Contact a Professional:** For any signs of an infestation, it's best to call a licensed pest control professional. They have the expertise and tools to identify the pest, determine the extent of the infestation, and implement effective treatment strategies. By implementing these preventative measures, you can significantly reduce the risk of a pest infestation in your plex building.
Seal cracks, reduce moisture, clean food sources, and coordinate maintenance between neighbors and management.
Are household products enough?
They can disperse ants without eliminating the colony. Targeted treatment and structural prevention are more effective.
When should you contact a professional?
If the infestations persist for several days, if multiple rooms are affected, or if the colony seems to be in the walls.

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