Carpenter ants are one of the most destructive pests in BC homes. Unlike termites, they don’t eat wood — they excavate it to build nests, hollowing out structural timber, beams, window frames, and decks. The everyday war with carpenter ants in BC is one many homeowners face without realising the damage accumulating inside their walls.
Why Carpenter Ants Are So Hard to Eliminate
A mature carpenter ant colony contains 3,000–5,000 workers spread across a parent nest (usually outdoors in a moist wood source) and multiple satellite nests inside the structure. DIY treatments that kill foraging workers on the surface do nothing to the colony. As long as the queen survives in the parent nest, the colony continues to grow and expand satellite nests deeper into the structure.
Signs You Have Carpenter Ants
The most reliable signs are frass — sawdust-like debris mixed with insect parts pushed out of galleries — near baseboards, window frames, or in the garage. You may also hear faint rustling sounds inside walls at night, see large black ants (10–12mm) foraging in the kitchen, or find winged carpenter ants emerging from walls in spring. Winged ants indoors in spring are a serious warning sign of an established indoor nest.
What Professional Carpenter Ant Control Involves
Effective carpenter ant control in BC requires locating and treating both the parent nest and all satellite nests. The parent nest is found by following foraging trails back to their source, typically at dusk when carpenter ants are most active. Treatment involves applying residual insecticide directly into nest galleries and along travel routes. A perimeter treatment prevents re-entry from outdoor nests.
Ending the Carpenter Ant War for Good
Permanent carpenter ant control requires addressing the conditions that attracted them: moisture damage in structural wood, woodpiles against the foundation, tree branches touching the roofline, and gaps in the building envelope. After treatment, fix any moisture issues, remove deadwood from the property, and seal entry points. Without these steps, new colonies will find the same entry points within a season.
Top Line Pest Control provides professional carpenter ant control across BC. Learn more about our carpenter ant control services, read about carpenter ant infestations, or contact us today for same-day service.