German and Oriental cockroaches spreading through your kitchen? Blackline Pest Control uses targeted gel bait and residual spray to eliminate colonies at the source — with a 100-day guarantee.
Montreal's dense urban housing, aging plumbing infrastructure, and cold winters that drive pests indoors make it a prime environment for cockroach infestations. The German cockroach (Blattella germanica) is by far the most common species found in Montreal apartments, restaurants, and commercial kitchens — and it is one of the most difficult pests to eliminate without professional intervention.
A single female German cockroach can produce up to 400 offspring in her lifetime. They reproduce so rapidly that a small infestation can become a full-scale crisis within weeks. They hide in the warmth of kitchen appliances, inside cabinet hinges, behind refrigerators, and within wall voids — places that household sprays simply cannot reach.
Beyond the psychological distress, cockroaches pose serious health risks. They carry Salmonella, E. coli, and Listeria on their bodies and in their droppings, contaminating food preparation surfaces. Their shed skins and droppings are a leading trigger of asthma attacks and allergic reactions, particularly in children. In Montreal's multi-unit buildings, an infestation in one unit can spread to an entire floor within months.
Blackline Pest Control uses professional-grade gel bait formulations that cockroaches carry back to their harborage sites, eliminating the entire colony — including individuals that never come into direct contact with the bait. Combined with residual spray treatments and crack-and-crevice applications, our approach achieves results that no over-the-counter product can match.
A multi-stage protocol that targets the colony, not just the individuals you can see.
We identify the cockroach species (German, Oriental, or American), locate all harborage sites, assess infestation severity, and determine the optimal treatment protocol. Species identification is critical — different cockroaches require different approaches.
Professional-grade gel bait is applied in precise amounts inside cabinet hinges, under appliances, along baseboards, and inside electrical outlets. Cockroaches consume the bait and carry it back to the colony, triggering a cascade effect that eliminates the entire population.
We apply Health Canada-approved residual insecticides to cracks, crevices, and harborage areas. These products remain active for weeks, killing cockroaches that emerge after the initial treatment and preventing re-infestation from neighbouring units.
We schedule 2–3 follow-up visits spaced 2 weeks apart to monitor activity, reapply bait as needed, and confirm complete elimination. Our 100-day guarantee covers free re-treatment if cockroaches return after the program is complete.
100-day guarantee: if cockroaches return within 100 days, we re-treat at no charge. A $45 travel fee applies to re-treatment visits outside the Montreal core.
Cockroaches are nocturnal. Seeing them during the day is a strong indicator of a severe infestation — the population has grown so large that competition for food and harborage is forcing them into the open.
German cockroach droppings resemble ground black pepper or coffee grounds. You'll find them in kitchen drawers, behind appliances, inside cabinet hinges, and along baseboards near food sources.
Cockroaches produce brown, purse-shaped egg cases called oothecae, each containing 30–40 eggs. Finding these behind appliances, in pantries, or under sinks confirms active breeding.
A large cockroach infestation produces a distinctive musty, oily smell from their pheromones and droppings. This odour can permeate food, dishes, and even walls in severe cases.
In humid areas, cockroaches leave brown smear marks along walls, baseboards, and surfaces they travel frequently. These marks are a combination of droppings and body secretions.
German cockroaches are particularly attracted to the warmth of refrigerator motors, dishwashers, microwaves, and coffee makers. Finding them inside appliances indicates a well-established infestation.
🇫🇷 Blattes visibles le jour · Excréments noirs · Capsules d'œufs · Odeur huileuse · Traces brunes · Blattes dans les appareils
🇪🇸 Cucarachas visibles de día · Excrementos negros · Cápsulas de huevos · Olor aceitoso · Marcas marrones · Cucarachas en electrodomésticos
Residential apartments, commercial kitchens, restaurants, and multi-unit buildings throughout Greater Montreal.
Restaurants & condos
Dense apartment buildings
Restaurants & cafés
Residential triplexes
Suburban homes & condos
South Shore residences
Commercial & residential
Industrial & commercial
Riverfront apartments
Family homes & duplexes
East-end residential
Student housing
A single cockroach treatment visit takes 1–2 hours. Most infestations require 2–3 treatments spaced 2 weeks apart for complete elimination. German cockroaches in particular reproduce rapidly and may need additional follow-up.
Cockroaches enter Montreal apartments through grocery bags, used appliances, shared walls, plumbing, and utility conduits. German cockroaches thrive in warm, humid kitchens and bathrooms. They are not a sign of poor hygiene — they can infest any building.
Yes. We use gel bait formulations that are highly targeted and low-toxicity. Gel bait is applied in small amounts inside cracks and crevices where cockroaches hide, minimizing exposure to humans and pets. Residents can typically return within 2–4 hours.
Yes. Cockroaches carry bacteria including Salmonella, E. coli, and Listeria on their bodies and in their droppings. They contaminate food preparation surfaces and can trigger asthma and allergic reactions, particularly in children.
German cockroaches are small (1.5 cm), light brown, and prefer warm humid kitchens and bathrooms. They reproduce extremely fast. Oriental cockroaches are larger (2.5 cm), dark brown to black, and prefer cool damp areas like basements and drains. Both require professional treatment.
Cockroach treatment in Montreal starts at $199 for a single-unit apartment. Larger units, severe infestations, and multi-unit buildings are priced based on assessment. We provide a free inspection and transparent quote before any work begins.
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Learn MoreReal feedback from Montreal homeowners and businesses we've helped.

“Had German cockroaches in my restaurant kitchen. Blackline came after hours, treated everything, and provided MAPAQ-compliant documentation. Zero cockroaches at my next inspection....”
“Cockroaches appeared in my apartment seemingly overnight. Blackline identified them as German cockroaches and used gel bait treatment. Within 2 weeks they were completely gone. The...”
“Excellent technician who explained exactly what he was doing and why. The gel bait approach was much less disruptive than I expected. No need to leave the apartment for long. Cockr...”
“My building had a cockroach problem spreading between units. Blackline coordinated with our property manager to treat all affected units simultaneously. Problem solved in one round...”
“Fast response, professional technician, effective treatment. Had cockroaches in my commercial kitchen and they handled it with minimal disruption to my business. Highly recommend f...”
“Needed 3 treatments to fully eliminate a severe infestation but Blackline was patient and thorough. They honored the guarantee without question. Good communication throughout.”
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