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Do you see large black ants, sawdust, or galleries in your walls, ceilings, or joists? A carpenter ant infestation can cause costly structural damage.
Contact a carpenter ant exterminator in Montreal for a prompt inspection and guaranteed professional treatment.
Pest control specialist carpenter ants
The carpenter ants (Camponotus) are the most destructive ant species found in Quebec. Unlike termites, they do not eat wood – they hollow it out to build their galleries and satellite nests, which can weaken joists, beams, frames, and your entire house structure in Montreal, Laval and on the North Shore.
Our technicians identify the main nest and satellite nests, treat the colony at its source with delayed-action baits that reach the queen, and apply a peripheral treatment to prevent re-infestation. The goal is not just to kill visible workers, but to destroy the entire colony and protect your wood long-term.
✅ Thorough inspection – ✅ Queen-targeted baiting – ✅ Professional written guarantee
Why are carpenter ants the most dangerous in Quebec
Carpenter ants are the most destructive wood-damaging insects to residential homes in Quebec. A mature colony can number up to 50,000 individuals, exist for 3 to 6 years before being detected, and cause between $5,000 $ and $15,000 $ in structural damage in less than a decade.
A colony of Camponotus never be solved with an aerosol insecticide. Spraying visible workers could even fragment the colony the ants move, create new satellite nests, and the infestation becomes harder to eliminate.
Our professional approach is based on three principles:
1. Locate the main nest (often in damp wood outdoors—stumps, porches, decks, foundation walls) and satellite nests indoors (walls, ceilings, insulation).
2. Use slow-acting lures. that the worker ants bring back to the queen. That's the only way to destroy the entire colony.
3. Apply a peripheral treatment around the foundations, windows, and entry points to block any re-infestation.
Each intervention is adapted to your building's configuration: single-family home, condo, duplex/triplex, rental building, or commercial property.
Insecticide gel treatment
Professional insecticidal gel is one of the most effective methods against pharaoh ants and pavement ants. Thanks to its slow-acting effect, ants carry the product back to the nest, which contaminates the colony and reaches the queen.
Preventive inspection and sealing
Our technicians inspect cracks, entry points, wet areas and nesting sites. Where possible, we recommend sealing access points to greatly reduce the risk of reinfestation.
Targeted spraying and spot treatment
We apply professional products approved by Health Canada to strategic areas such as baseboards, cracks, garages, foundations, windowsills and other points of activity. Treatment is targeted to maximize effectiveness while limiting unnecessary exposure.
Long-lasting professional baits
Professional baits are used for many types of ant infestations in homes, businesses and buildings. They provide long-lasting control by targeting ants' feeding behavior and their movement towards the colony.
Why choose us
Why choose a carpenter specialist ?
A pest control professional specializing in carpenter ants is essential to protect your property's value in Montreal. An untreated infestation can reach 50,000 individuals and cause thousands of dollars in wood damage. An untreated infestation can cause several thousand dollars in structural wood damage in just a few years.
Our objective is simple: eliminate the entire colony, protect the building structure, and guarantee the result in writing.
Our advantages:
👨🔬 Certified pest control technicians
Specific training on Black carpenter ant (black carpenter ant) and other species found in Quebec. Thermal and visual inspection to locate nests hidden in walls and ceilings.🎯 Targeted slow-acting queen bait
We do not use aerosols that disperse the colony. Our professional baits are carried back to the nest by the workers and reach the queen within 24 to 72 hours.🪵 Comprehensive structural inspection
We identify areas of damp wood, galleries, frass (sawdust), and entry points to treat the cause of the infestation, not just the symptoms.💯 Professional written guarantee
Post-treatment follow-up included. If the colony reappears within the guaranteed period, we will return at no additional cost.
Our method in 4 steps
Our carpenter ant extermination method is based on 4 steps: structural inspection, species identification, targeted treatment of the queen, and long-term prevention. An active colony is rarely visible in its entirety. When you see a few ants in the kitchen or basement, the main nest often contains several thousand individuals and can exist for 3 to 6 years in a damp wooded area outside the house.
Our extermination method relies on four essential steps: Comprehensive inspection, species identification, targeted treatment of the queen, and sustainable prevention. against re-infestation.
Recognize a 1 Carpenter ant 2 Large ant with mandibles 3 Nests in wood 4 Can damage structures 5 Often black or reddish
Physical characteristics and behavior
The black carpenter ant (Black carpenter ant) is the most common species in Quebec. Here's how to recognize it:
- Size 6 to 13 mm - this is one of the largest ants found in residential areas.
- Color : black or reddish-black, with sometimes matte reflections.
- Shape Slender waist, elbowed antennae, rounded thorax without points.
- Wings The breeding females have wings in the spring (swarming in May-June).
- Activity : especially at night. If you see ants at night or early in the morning, that's a strong clue.
Carpenter ants are looking for Damp or rotten wood to dig their galleries. They favor wood affected by a leak, infiltration, water damage, or lack of ventilation. Once the main nest is established, they create dry satellite nests inside the house.
Signs of an active infestation
- Fine wood shavings (frass) at the base of walls, in basements, or near ceilings. Resembles sand or fine shavings, sometimes mixed with insect fragments.
- Scratch or crackling noise in the walls or ceilings, especially at night, a sign of wood-boring activity.
- Clean and smooth galleries visible in exposed wood (different from coarse, mud-filled termite galleries).
- Presence of large black ants isolated far from any food source (pantry, bathroom, garage).
- Swarming winged ants in the house in spring — a critical sign of a mature nest.
- Limp or saggy wood around the windows, roof, joists, porch, or deck.
What damage can Carpenter ants
Contrary to popular belief, carpenter ants they don't eat wood. They dig into it to nest. But the structural damage they cause can rival that of termites if the infestation is ignored for several years.
A mature colony can have up to 50,000 individuals and create several satellite nests on the same property. The most affected areas are:
- the floor joists above the basement; ;
- the main beams and rafters of the roof; ;
- poorly sealed window and door frames ;
- wood foundation walls or door sills ;
- treated wood decks, porches, and galleries ;
- rigid foam insulation glued to the foundation.
The cost of repairs can easily exceed 5,000 to 15,000 $ in advanced cases. Prompt intervention by a carpenter ant exterminator avoids these major expenses.
Why a treatment professionalism is essential
Over-the-counter insecticides only eliminate visible worker ants, which are less than 5 % of the colony. The queen, nymphs, satellite nests, and the main nest remain intact. Worse: spraying workers can trigger a defense mechanism where the colony fragments and creates new nests elsewhere in the house.
A specialist uses Non-repellent slow-acting baits which the worker ants accept as food and bring back to the queen. The entire colony dies in 1 to 3 weeks, without spreading.
Our typical intervention includes:
- Full interior and exterior inspection (including basement, crawl space, roof); ;
- identification of the exact species and location of the nests ;
- Professional bait application in strategic locations; ;
- peripheral treatment of the foundation and entry points ;
- Recommendations on humidity, wood, and ventilation; ;
- Post-treatment follow-up and written warranty.
Prevent a recurrence carpenter ant infestation
Carpenter ant prevention relies mainly on eliminating damp wood and managing moisture around the house. After treatment, several measures can prevent a new colony from establishing itself. As these ants actively seek out damp wood, prevention primarily involves managing water and humidity.
Recommended measures:
- quickly repair any plumbing leak, roof leak, or condensation; ;
- Improve ventilation in basements, crawl spaces, and attics; ;
- replace rotten or damaged wood around windows, doors, porches, and decks; ;
- trim tree branches that touch the house or roof; ;
- Keep firewood piles at least 5 meters away from the house and elevate them. ;
- remove dead tree stumps near the foundation; ;
- Seal foundation cracks, pipe joints, and electrical penetrations; ;
- maintain a 30 cm clear strip around the foundation (no soil, mulch, or vegetation against the wall).
An annual preventive inspection helps identify favorable conditions before a new colony settles in.
What what our customers say of our interventions
Areas carpenter ant services
Our specialized technicians operate throughout the Greater Montreal area for single-family homes, condos, plexes, rental buildings, and businesses affected by Black carpenter ant.
Montreal: Ahuntsic, Villeray, Rosemont, Plateau Mont-Royal, Saint-Léonard, Saint-Laurent, Hochelaga-Maisonneuve, Notre-Dame-de-Grâce, Pierrefonds, West Island and surrounding areas.
Laval and the North Shore: Chomedey, Sainte-Rose, Sainte-Dorothée, Fabreville, Auteuil, Pont-Viau, Terrebonne, Blainville, Mascouche, Boisbriand.
South Shore Longueuil, Brossard, Saint-Hubert, Boucherville and related sectors.
Fast, discreet, and professional service for any carpenter ant infestation.
Written guarantee against carpenter ants
We eliminate the entire colony and permanently protect your property's structure. Depending on the type of infestation and the treatment performed, our carpenter ant interventions include written guarantee from professional.
Our comprehensive approach:
- structural inspection of affected areas (interior + exterior); ;
- Canada Health approved professional baiting application ;
- perimeter foundation treatment and entry points ;
- Recommendations on moisture management and prevention; ;
- Post-treatment follow-up and free return in case of re-infestation during the warranty period.
A transparent, professional approach tailored to the reality of your building.
Others pests we treat
In addition to carpenter ant extermination, we offer professional treatments for several other pests in Montreal, Laval, the North Shore, and the South Shore.
Our services include
🪳 Bedbugs – Complete treatment with professional insecticides and a 6-month guarantee.
🐭 Mice and rats – Inspection, sealing, and safe rodent control.
🪰 Mosquitoes and flying insects – Exterior spraying and environmentally friendly treatment.
🐜 Carpenter ants and pharaoh ants – Targeted treatment with gel and professional insecticide.
🐝 Wasps and hornets – Nest destruction and safety prevention.
🪲 Termites – Thorough inspection and long-term treatment.
🕷️ Spiders – Exterior and interior treatment to remove webs.
How much does a Control of carpenter bees?
The price of an intervention usually ranges between 250 $ and 650 $ based on several factors:
- the size of the building (single-family home, condo, duplex/triplex, apartment building); ;
- the extent of the infestation and the number of satellite nests identified. ;
- accessibility of the affected areas (basement, crawl space, roof); ;
- the need for interior treatment alone or interior + exterior peripheral treatment; ;
- The desired warranty period.
A pre-inspection allows for an accurate assessment of the situation and the provision of a tailored quote. We never charge hidden fees, and all our services include post-treatment follow-up.
For a severe infestation affecting the structure, a multi-visit treatment plan may be recommended. Request your free estimate at (438) 835-8401.
Fair questions about carpenter ants
Carpenter ant (Black carpenter ant) is a big ant Black or reddish-black, measuring between 6 and 13 mm. She has a narrow waist, elbowed antennae, and a rounded thorax without spines. In the spring, reproductive females have wings. If you observe these ants especially at night or early in the morning, it is a strong sign of an active infestation.
Yes, very dangerous in the long term. Although they don't eat wood, they hollow it out to build their galleries. A mature colony can weaken the Joists, beams, and frames from your house. Without intervention, the structural damage can exceed 5,000 to 15,000 $ in a few years. The earlier the infestation is treated, the more limited the repair costs will be.
The price usually ranges between 250 $ and 650 $ depending on the size of the building, the extent of the infestation, the number of satellite nests, and the accessibility of the affected areas. An initial inspection allows for an accurate estimate. We offer a professional inspection and a written professional guarantee.
The main nest is almost always found outside in Damp or rotten wood Tree stump, porch, deck, foundation wall, firewood. Inside, satellite nests are often in walls, ceilings, insulation, or joists above damp areas (bathroom, kitchen, basement). A professional exterminator uses visual and thermal inspection to locate these hidden nests.
No, it's even counterproductive. Aerosol insecticides only eliminate the visible workers (less than 5% % of the colony) and can shatter the nest, which worsens the infestation. The queen remains protected in the main nest and continues to lay eggs. Only professional slow-acting baits, carried back to the nest by the workers, can reach the queen and destroy the entire colony.
With professional bait treatment with a delayed effect, the entire colony dies in 1 to 3 weeks. Visible activity decreases in the first few days. For severe infestations affecting multiple satellite nests, a multi-visit plan may be recommended. Our post-treatment monitoring confirms complete elimination.
Yes ✅ All our products are approved by Health Canada and applied in a targeted manner by our certified technicians. Gel baits are placed in areas inaccessible to children and pets (cracks, foundation perimeters, behind appliances). Liquid treatments dry quickly and pose no residual risk.
The carpenter ants burrow into wood to nest (clean, smooth galleries, visible sawdust) but do not eat it. The termites The wood is eaten and their galleries are filled with mud. In Quebec, termites are rare in residential areas, unlike carpenter ants, which are very common. The distinction is important because the treatments are completely different.
If the ants come back, it's almost always because a Favorable conditions persist Damp, unrepaired wood, active water leaks, unsealed foundation cracks, or satellite nests missed during a previous treatment. Our approach includes a comprehensive analysis of structural conditions and precise recommendations to definitively eliminate the risk of reinfestation.
