Greenville, NC 27834 | (252) 523-8255

Carpenter Ants

Carpenter ants are one of the most destructive nuisance ants we deal with in Eastern North Carolina. Unlike termites, they don’t eat wood—but they excavate wood to build nests, which can weaken structural components over time. Homes with moisture issues, crawlspaces, roof leaks, or older wood are especially attractive to carpenter ants.

Scientific Classification

  • Order: Hymenoptera
  • Family: Formicidae
  • Scientific Name: Camponotus spp.

Overview

Carpenter ants thrive in moist or decaying wood, making crawlspaces, wall voids, window sills, decks, porches, and rooflines common nesting sites. Activity often increases in spring and early summer, when winged swarmers may appear indoors—often mistaken for termites.

Interesting fact: A carpenter ant colony can contain thousands of ants and may include multiple satellite nests spread throughout a structure.

Quick Facts & Identification

  • Size: 1/4″ to 1/2″ (workers vary in size)
  • Color: Black, red, or black with a reddish thorax
  • Key Features:
    • Elbowed antennae
    • Narrow “waist” (one node)
    • Smooth, evenly rounded thorax (side profile)
  • Life Stages / Castes: Egg → Larva → Pupa → Adult (workers, major workers/soldiers, reproductives)
  • Lifespan: Queens can live 10–15 years; workers can live several years
Close-up image of carpenter ants (Camponotus spp.) showing large size and elbowed antennae
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Behavior & Habitat

  • Behavior: Wood-nesting ants that forage primarily at night
  • Diet: Sweets, proteins, honeydew from aphids, and dead insects
  • Preferred Environments in Eastern NC:
    • Damp or water-damaged wood
    • Crawlspaces, basements, and wall voids
    • Areas with roof leaks, plumbing leaks, or condensation
    • Trees, stumps, and landscape timbers near structures

Signs of a Carpenter Ant Infestation

  • Piles of frass (fine sawdust mixed with insect parts) near baseboards, window sills, or below wall voids
  • Rustling sounds inside walls, especially at night
  • Large ants seen indoors—often in kitchens, bathrooms, and near moisture sources
  • Winged swarmers emerging from walls, ceilings, or window frames (commonly in spring)

Why You Might Have Carpenter Ants

Carpenter ants are usually drawn to conditions that provide moisture and easy nesting opportunities. Common triggers include:

  • Excess moisture or high humidity (especially in crawlspaces)
  • Wood-to-soil contact around siding, steps, decks, or porches
  • Damaged or rotting wood from leaks
  • Trees or branches touching the home (acts like a bridge)
  • Existing wood damage (including old termite damage) that creates ideal nesting zones

Risks & Damage

Health Risks

Carpenter ants are not known to transmit diseases, but their presence indoors is a serious nuisance and can indicate underlying moisture or wood-damage conditions.

Property Damage

Over time, carpenter ants can hollow out wood in beams, joists, sill plates, trim, and framing. Damage is often slow but can become costly if infestations remain hidden behind walls or under floors.

Prevention Tips

  • Repair roof, plumbing, and HVAC leaks promptly
  • Reduce crawlspace humidity (vapor barrier, drainage, and ventilation strategy)
  • Seal cracks, gaps, and utility penetrations on the exterior
  • Trim limbs away from the structure and keep shrubs off siding
  • Store firewood and lumber away from the home and off the ground
  • Replace damaged or rotting wood and keep gutters draining properly

Control & Treatment

DIY sprays and store-bought baits often fail because they don’t eliminate the queen or the satellite nests. Effective carpenter ant control typically requires:

  • Accurately identifying and locating nest sites (primary and satellite)
  • Using professional-grade, non-repellent products where appropriate
  • Targeted bait placement and monitoring based on activity patterns
  • Correcting moisture conditions to prevent reinfestation

Professional Integrated Pest Management (IPM) gives you the best chance at full colony elimination and long-term protection.

FAQ: Carpenter Ants

Are carpenter ants worse than termites?

They damage wood differently. Termites eat wood, while carpenter ants excavate wood to build nests. Both can cause serious structural issues if not corrected.

Do carpenter ants mean I have rot?

Often, yes. Carpenter ants prefer damp or previously damaged wood, so their presence can be a warning sign of moisture problems that should be addressed.

Can carpenter ants live in walls?

Yes. Wall voids, window frames, insulation pockets, and sill plates are common nesting areas, especially near moisture sources.

Why do I see them at night?

Carpenter ants frequently forage after dark. Seeing activity at night can be a strong indicator of an established nest nearby.

Do I need professional treatment?

In most cases, yes. Carpenter ant infestations are rarely solved with over-the-counter products alone, especially if there are multiple nests or hidden moisture conditions.

Call to Action

If you’re seeing large ants, frass (sawdust-like piles), or swarmers in your home, don’t wait. Early treatment helps prevent expensive repairs.

Contact D & D Pest Control Co.
Phone: (252) 523-8255
Website: https://ddpestcontrol.com/