Sidney, BC · Saanich Peninsula · Greater Victoria

Carpenter Ant Control

Seeing Large Black Ants Indoors?

Carpenter ants are one of the most important ant problems to take seriously. Unlike common nuisance ants, carpenter ants can tunnel through wood and may be connected to damp, damaged, or aging structural materials.

Apollo Pest Control provides carpenter ant inspection and treatment for homes, rental properties, restaurants, cafés, and small businesses. Service focuses on locating activity, identifying likely nesting areas, and recommending treatment and prevention steps based on the property.

Why Carpenter Ants Are Different

Decks and damp exterior wood are classic carpenter-ant territory.

Carpenter ants do not eat wood the way termites do, but they can excavate wood to create nesting galleries. Over time, that activity can become a concern, especially if the colony is established inside or near the structure.

Carpenter ants are often associated with moisture. Activity may appear near older wood, decks, window frames, siding, crawlspaces, damp wall voids, sheds, or areas affected by leaks.

Because nests can be hidden, carpenter ant problems are not always obvious from the number of ants seen indoors.

Signs of Carpenter Ant Activity

A carpenter ant issue may be present if you notice:

  • Large black ants indoors
  • Ants appearing repeatedly in the same area
  • Ant activity near damp wood, windows, decks, or siding
  • Sawdust-like material near walls, baseboards, or wood trim
  • Rustling sounds inside walls or ceilings
  • Winged ants indoors
  • Ant trails around exterior wood or foundation areas
  • Activity near crawlspaces, garages, sheds, or rooflines

A few carpenter ants inside the home can be worth investigating, especially if they appear more than once.

Common Carpenter Ant Areas

Carpenter ants are often found where moisture, wood, and access points overlap.

AreaWhy It Matters
Window and door framesMoisture can collect around aging seals or trim
Decks and stairsExterior wood may stay damp or weathered
CrawlspacesMoisture and hidden access points can support activity
Siding and trimGaps and damaged materials may provide access
Garages and shedsWood storage and less-frequent inspection can allow nesting
Rooflines and wall voidsHidden spaces may allow activity to go unnoticed

Inspection Matters

Carpenter ant treatment should not be based only on where ants are seen. The visible activity may be far from the main nest or connected to an exterior colony.

A carpenter ant inspection helps answer three important questions:

  • Where are the ants active?
  • Is the nest likely inside, outside, or both?
  • What conditions may be allowing the problem to continue?

Treatment and Prevention

Treatment depends on the location and severity of the activity. Apollo Pest Control may use targeted treatment, monitoring recommendations, and prevention guidance based on what is found during inspection.

Prevention recommendations may include:

  • Repairing moisture issues or leaks
  • Replacing damaged or rotting wood
  • Trimming vegetation away from the structure
  • Moving firewood away from exterior walls
  • Sealing gaps where appropriate
  • Improving crawlspace conditions
  • Removing wood debris near the home
  • Monitoring areas where ants have returned before

When appropriate, eco-conscious and pet-friendly options are considered as part of the service plan.

When to Call a Professional

Carpenter ants are not the pest to ignore or guess at. If large ants are appearing indoors, especially repeatedly, it is better to inspect early. The sooner the source is identified, the easier it may be to control the issue and reduce further activity.

Related: Ant Control, Residential Pest Control

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