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Carpenter Ants
Crawling Insects Active now

Carpenter Ants

Camponotus pennsylvanicus

How to Identify

– Listen for soft rustle in attic or wall.
– Look for small piles of coarse sawdust near wood.
– Watch for large black ants near roof leaks.

Health Risks

Do not sting but can bite; excavate galleries in structural wood, weakening beams and framing over time — less rapid than termites but cumulative damage can be significant. Carpenter ants do not eat wood. They dig through it to make nests. Over time these tunnels can weaken beams and framing. The damage builds up slowly, so it is easy to miss. A bite may pinch, but it is not dangerous to people.

They do not spread disease in Portland. They can weaken wood over time.

Our Treatment Method

Locate and treat parent colony with residual dust or non-repellent liquid; address moisture source driving infestation; perimeter bait application for outdoor forager control. A pro tracks the ants back to the main nest. Treating that nest is the key to real control. Fixing the leak or damp wood removes what drew them in. Bait around the home then catches the ants still foraging outside.

We track ants to the main nest. Then we treat the nest and fix the leak.

EPA-approved products · Licensed technicians · Satisfaction guaranteed

Prevention Tips

– Eliminate moisture issues — repair roof leaks, condensation, and plumbing drips promptly.

– Trim tree branches and shrubs away from rooflines and siding.

– Store firewood off the ground and away from the house exterior.

– Seal exterior gaps, utility penetrations, and door/window frames with caulk.

– Replace any rotted or water-damaged wood before ants establish galleries.

– Repair roof and plumbing leaks right away.

– Keep tree limbs off the roof and siding.

– Store firewood off the ground, away from walls.

Habitat & Behavior

Moist or decayed wood in wall voids, roof eaves, window frames, and hollow doors; satellite colonies often located in dry structural wood adjacent to a moisture-damaged parent colony outdoors. They love wood that is already damp or starting to rot. Wall voids, roof edges, and window frames are common spots. They often nest near a leak or a water-damaged board. Many homes have one main nest plus smaller satellite nests inside.

Local Prevalence

Carpenter-ants are a common worry in Portland old homes. They like damp, rotted wood by the coast.

Protection Plans

Choose Your Level of Protection

Every plan includes free re-treatments, a dedicated technician, and our No-Bug Guarantee.

Essential

$45 /mo
  • Quarterly exterior perimeter treatments (four visits/year)
  • Targeted interior spot treatments at no extra charge between visits
  • Annual inspection and written treatment summary
  • 30-day satisfaction re-treatment guarantee
Get Essential Protection Today

Premium

$159 /mo
  • Monthly comprehensive service plus termite monitoring
  • Priority scheduling with 24/7 emergency callbacks
  • Two seasonal mosquito and tick yard treatments
  • Annual exclusion audit with small repairs included
Get Premium Complete Protection

Professional

$89 /mo
  • Monthly interior + exterior service (12 visits/year)
  • Priority same-week scheduling and one free callback between visits
  • Rodent monitoring and basic exclusion checks (minor sealing included)
  • Seasonal wasp and insect activity checks
Protect your home year-round

Confused? Compare: Common Ants vs. Carpenter Ants

See a side-by-side comparison to tell them apart.

View Comparison

Don't Let Pests Win.
Take Back Your Home Today.

Every day you wait gives pests more time to multiply and cause damage. Our licensed technicians are ready to help — often the same day you call.

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Available Mon–Fri 8:00 AM–6:00 PM; Sat 9:00 AM–3:00 PM. Emergency and weekend appointments available; 24/7 on-call for urgent rodent or bee-swarm situations.