Why Coquitlam has the heaviest carpenter ant pressure in our service area
Burke Mountain and Westwood Plateau push houses into mature Douglas fir + western hemlock forest. That forest is the natural carpenter ant habitat. The houses are downstream.
Carpenter ants are forest insects. The species we work with in Coquitlam — Camponotus modoc, the western black carpenter ant — is a native Pacific Northwest species that nests primarily in standing dead wood in mature coniferous forest. The biology hasn't changed. What's changed is where the houses are. Burke Mountain, Westwood Plateau, and the upper Coquitlam River corridor have been pushing residential development into mature Douglas fir + western hemlock forest for the last two decades. Every new subdivision that intersects that forest sits on top of an existing carpenter ant ecology. The ants don't disappear when the houses arrive; they extend foraging into the new structure.
This is why Coquitlam has the heaviest residential carpenter ant call volume in our service area, and why a Coquitlam carpenter ant program is structurally different from a Vancouver pavement ant program. Pavement ants are an annoyance; carpenter ants are a structural pest that excavate galleries in your framing if their parent colony establishes a satellite in your house.
Three things to know about carpenter ant biology that drive how we treat:
- They don't eat wood. Camponotus excavates galleries in wood for nesting; they eat sugars (especially honeydew from aphids), proteins, and household food. Treatment that targets the food trail is less effective than treatment that targets the colony.
- They prefer wet wood. The ants almost always start in wood that has been moisture-compromised — a roof leak, a window-frame seep, deck flashing failure, plumbing leak inside a wall. Find the moisture source and you find the colony.
- Parent colonies are usually outside, satellites are inside. The mature parent colony is typically in a stump, woodpile, or standing dead tree on or near the property. Indoor activity is usually a satellite colony. Killing the satellite without addressing the parent leaves the door open for re-establishment.
Our Coquitlam carpenter ant treatment method
Find the moisture source. Find the parent colony. Treat with non-repellent. Address the structural cause.
The standard ant treatment most companies sell — perimeter pyrethroid spray — is largely useless against carpenter ants and actively counterproductive in some cases. Pyrethroids are repellent; carpenter ants detect them, the satellite colony scatters, and the parent colony remains untouched. Within 60-90 days a new satellite is established somewhere else in the house and the call comes back. We don't run that play.
Find the moisture source
25-point inspection of the property — roof, attic, crawlspace, deck attachment, window frames, plumbing penetrations, basement walls, chimney flashing. We're looking for moisture-compromised wood. Carpenter ants choose damp wood for excavation almost exclusively. The moisture source is the structural fix; the ants are the symptom.
Locate the parent colony
Trace foraging trails outward from the indoor activity to find the parent colony. In Burke Mountain + Westwood Plateau properties this is almost always in a stump, deck post, woodpile, standing dead tree, or fence post on the property or adjacent. Carpenter ants forage at night; we use a flashlight for trail-tracing on dusk + early-night inspections where needed.
Treat with non-repellent
Modern carpenter ant treatment uses non-repellent products (typically fipronil-based formulations) that the ants don't detect. They walk through it, return to the colony, and the active ingredient transfers through the colony via grooming + trophallaxis (food sharing). The colony is eliminated from the inside out over 14-21 days. We treat the parent colony location directly + treat indoor activity zones to handle the satellite.
Address the structural cause
We document every moisture source we found with photos and a written remediation list. Some are minor (clear gutter clog, replace cracked exterior caulk); some are significant (replace soffit fascia, address roof leak). Without the structural fix, the carpenter ants will return — to the same wet wood, or to a new wet wood source elsewhere in the structure. We do the entomology; the homeowner or contractor does the structural fix; both are required for a durable result.
Coquitlam ant identification — carpenter ant vs. other species
The Coquitlam ant catalog is wider than just carpenter ants. We see all of these regularly:
- Western black carpenter ant (Camponotus modoc) — large (8-13mm workers, 13-18mm queens), shiny black, single-petiole between thorax and abdomen, smooth thorax profile. Forest-interface dominant species in Coquitlam.
- Pavement ant (Tetramorium immigrans) — small (3mm), brown to black, two-petioled, sidewalk-and-driveway nesting. Common in central Coquitlam townhouse complexes; dramatic super-colony swarms in spring.
- Odorous house ant (Tapinoma sessile) — very small (2-3mm), brown to black, gives off a distinct rotten-coconut smell when crushed. Common in newer Burke Mountain construction.
- Pharaoh ant (Monomorium pharaonis) — tiny (2mm), pale yellow to light brown. Rare in residential Coquitlam but appears in commercial healthcare + food-service contexts.
- Thatching ant (Formica obscuripes) — large (5-8mm), red-brown thorax with black head and abdomen, builds visible mound nests in landscape. Forest-edge species, rarely a structural pest.
Identification matters because the treatment differs. Carpenter ants need the colony-elimination protocol above. Pavement ants need a sweet bait + perimeter program. Odorous house ants need a different bait altogether. We identify from a clear photo on WhatsApp before recommending a scope.
60-day return guarantee
If carpenter ants return within 60 days of your final Coquitlam treatment, we come back. No charge. No argument. The return visit is a fresh diagnosis — usually the cause is either an unaddressed moisture source we documented but the homeowner hasn't yet repaired (we'll re-document and re-recommend) or a previously hidden parent colony location that has now revealed itself.
For Burke Mountain + Westwood Plateau forest-interface properties, we recommend a spring + late-summer maintenance program rather than reactive work. The ant pressure is constant at the property line; the work is keeping it on that side of the wall.
Coquitlam ant control pricing
| Service | Starting at | What's included |
|---|---|---|
| Single-visit carpenter ant treatment | $349 | Inspection, parent colony location, indoor + outdoor treatment, photo report, structural moisture-source list, 60-day guarantee. |
| Forest-interface property package | $549 | Built for Burke Mountain + Westwood Plateau + Coquitlam River corridor properties. Spring + late-summer treatments + ongoing monitoring. |
| Pavement ant single-visit | $249 | Sweet-bait + perimeter program, 60-day guarantee. |
| Spring annual maintenance | $179 / visit | March-April timed treatment for properties with consistent annual ant pressure. |
| Strata townhouse coordination | Custom quote | For pavement ant super-colonies that span multiple townhouse units. Common-area + perimeter treatment with strata board engagement. |
| Acreage / heavy forest interface | Custom quote | For larger properties bordering Pinecone Burke Provincial Park or the Coquitlam River watershed. |
Coquitlam neighbourhoods we treat for ants
Same-day across all of Coquitlam. 35 km from our North Delta dispatch hub.
- Burke Mountain — premium new construction on mature forest interface, peak carpenter ant pressure
- Westwood Plateau — established premium residential, mature Douglas fir adjacency
- Coquitlam River corridor — riverside residential with natural moisture exposure
- Eagle Ridge — single-family + townhouse, forest-edge
- Coquitlam Center — high-density rental + condo, mixed pavement + odorous house ant
- Maillardville — established older single-family, occasional carpenter ant in cedar shake roof homes
- Austin Heights — established residential
- Como Lake — established single-family with mature canopy
- River Springs — newer subdivisions on agricultural-forest edge
- Hyde Park — established residential
- Lower Coquitlam — older single-family with persistent moisture-related carpenter ant pressure
- Cape Horn — premium estate-style properties