Three different ant species in Vancouver — three different treatments
If a pest control company offers a single 'ant treatment' without asking which species, find a different company. The wrong product on the wrong species makes the problem worse.
Vancouver homes deal with three common ant species. Each has a different ecology and a different treatment approach:
| Species | Size | Identification | Where you see them |
|---|---|---|---|
| Carpenter ant (Camponotus modoc) | 8-12mm (workers); winged reproductives 15-18mm | Black, single node, evenly rounded thorax. Often confused with winged termites — but carpenter ants have a pinched waist + bent antennae. | Wood-frame moisture-damaged homes — Kitsilano Craftsmans, Dunbar pre-1960 stock, Marpole heritage. Active April-September. |
| Pavement ant (Tetramorium caespitum) | 2-3mm | Dark brown to black, two nodes, head + thorax with parallel grooves visible under magnification. | Townhouse complexes + pavement-adjacent single-family. Super-colonies span multiple units. Marpole, parts of South Vancouver. |
| Odorous house ant (Tapinoma sessile) | 2-3mm | Dark brown, single node hidden under abdomen. Crushed ants give off a distinctive coconut-rancid smell — diagnostic. | Kitchens + bathrooms in any home. Trail along countertops + baseboards. The most common indoor ant complaint in Vancouver. |
Carpenter ants — the moisture-source problem
Carpenter ants are the most consequential ant species in Vancouver because they damage wood as they nest. They don't eat the wood (they tunnel through it to build galleries for the colony), but a long-established colony can compromise structural members. The Vancouver context: pre-1960 wood-frame homes with cedar shake or cedar shingle roofs, persistent moisture damage from gutter overflow / failed flashing / rotted fascia, and mature canopy keeping rooflines damp through June. Kitsilano, Dunbar, North Van, parts of Burnaby Heights — high-density carpenter ant territory.
Spring swarmer flights in April-May are the visible signal. Winged reproductives emerge from established colonies and disperse to start new ones. Finding 20-50 winged ants on your bathroom windowsill in late April means you have an established colony in or around the structure of your home.
Treatment without addressing the underlying moisture source is a recurring revenue model, not a solution. Our carpenter ant work always includes a roof + gutter + fascia + deck-ledger flashing inspection. We refuse to apply chemical treatment if the moisture source is uncorrected — too high a recurrence rate. The honest conversation: sometimes the right answer is "call your roofer first, then call us back in 30 days."
Pavement ants — the strata-coordination problem
Pavement ants don't damage your home, but they're persistent and they form super-colonies that span multiple units in townhouse complexes. Treating one unit at a time is whack-a-mole — the colony servicing your patio is also feeding from the unit two doors down, and three doors down, and across the parking lot. Per-unit treatment is the model the big national companies sell because it generates more invoices; it's not the model that solves the problem.
For Vancouver townhouse complexes (most common in Marpole + parts of Burnaby), the right approach is property-wide perimeter treatment + targeted exclusion + an annual maintenance program. We work directly with strata councils to scope this — typical per-unit cost lands at $90-110/year for a 4-visit program, which is much better economics than 30 separate unit-by-unit calls.
Odorous house ants — the kitchen + bathroom problem
Odorous house ants are the most common indoor ant complaint in Vancouver. They trail along countertops, around dishwashers, behind bathroom sinks, and into pet food bowls. They don't damage anything; they're just persistent and disgusting (especially when crushed — that distinctive coconut-rancid smell is the giveaway).
Treatment is straightforward when done correctly: gel bait + targeted residual product at entry points + sanitation guidance. The mistake we see most often is consumer aerosol use — spraying visible ants with Raid kills the workers but doesn't kill the colony. Within 2-3 days a new generation of workers appears from the same colony, often with the trail rerouted. We use bait-led approaches that get the colony at its source.
Our Vancouver ant control method
Identify the species. Find the source. Then treat with the right approach.
Identify
Species ID first. Carpenter, pavement, and odorous house ants need different treatments — applying the wrong one is at best ineffective, at worst makes the problem worse (some products are repellent to certain species and cause colony budding). We confirm species before treatment.
Source-trace
For carpenter ants: roof + gutter + fascia + flashing inspection to find the moisture source. For pavement ants: perimeter + landscape interface assessment to find the colony's main location. For odorous house ants: indoor entry-point + harborage assessment.
Treat — bait-led
Modern ant control is bait-led. Workers carry bait back to the colony, where it's distributed via trophallaxis (mouth-to-mouth feeding). This kills the queen + colony. Spray treatments kill workers but leave the colony intact and trigger fragmentation (worse outcome). For carpenter ants we use foam injections into nest galleries; for pavement ants gel + granular perimeter bait; for odorous house ants gel bait at trail intersections.
60-day return guarantee
If ant activity returns within 60 days of your treatment, we come back. No charge. The return visit is a fresh diagnosis. For carpenter ants specifically, the 60-day guarantee assumes the moisture source has been corrected — if you didn't fix the failed flashing, we'll come back the first time, but ongoing recurrence is on the moisture problem, not the chemical treatment.
Vancouver ant control pricing
| Service | Starting at | What's included |
|---|---|---|
| Odorous house ant treatment | $199 | Identification, source-tracing, bait-led treatment, 60-day guarantee. |
| Carpenter ant treatment + moisture assessment | $399 | Roof + gutter + fascia + deck-ledger inspection, foam injection of accessible galleries, perimeter treatment, 60-day guarantee. |
| Pavement ant single-unit | $249 | Perimeter + targeted bait, 60-day guarantee. (Property-wide for townhouse complexes recommended — see below.) |
| Strata pavement ant program | Custom | Property-wide perimeter + annual 4-visit maintenance. Per-unit cost typically $90-110/year at scale. |
| Quarterly residential ant maintenance | $139 / visit | Four visits per year, perimeter inspection + bait refresh + early-detection. No contract. |
Vancouver neighborhoods we serve for ant control
Same-day across all of Vancouver City. Heaviest carpenter ant volume: Kitsilano, Dunbar, North Vancouver, Marpole heritage. Heaviest pavement ant volume: Marpole townhouse complexes.
- Kitsilano — heavy carpenter ant volume (Craftsman + cedar shingle)
- Dunbar — premium West Side, carpenter ant + paper wasp
- Point Grey — UBC adjacency + mature single-family
- Kerrisdale — heritage homes + carpenter ant
- Shaughnessy — heritage estates, carpenter ant + paper wasp
- Marpole — townhouse pavement ant + heritage carpenter ant
- Mount Pleasant — character homes + carpenter ant
- East Vancouver — older single-family, mixed
- Strathcona — heritage stock, mostly indoor odorous
- Downtown / West End — apartment-stock odorous house ant
- Cambie / South Granville — mixed
- Renfrew-Collingwood — mid-century, mixed