Find the Nest
Trace trails and inspect damp wood, wall voids, trees, and stumps to locate the colony.
Pest Education • DFW Pest Control
Carpenter Ant Control in DFW
Carpenter ants don't eat wood, but they hollow it out to nest, often where moisture has already softened it. Learn the signs and how control really works.
Family-OwnedVeteran-OwnedSince 2016
Reviewed and updated June 2026
At a Glance
Carpenter ants excavate galleries in moist or damaged wood. Control means finding the nest, correcting moisture, and baiting, not just killing the ants you see.
Quick Facts
- Size: Large, up to half an inch
- Color: Usually black, sometimes red and black
- Sign: Smooth galleries and sawdust-like frass
- Concern: Damage to damp or compromised wood
What Are Carpenter Ants?
Carpenter ants are among the largest ants found around Texas homes. They are usually black, sometimes with reddish tones, and workers vary in size within a single colony.
Unlike termites, carpenter ants do not eat wood. They tunnel through it to build smooth nesting galleries, pushing out the debris as a fine, sawdust-like material called frass.
Signs and Why They Matter
Carpenter ants prefer wood that is already damp or decaying, so their presence often points to a moisture problem such as a leak, poor drainage, or condensation.
- Piles of sawdust-like frass below baseboards, sills, or trim.
- Large ants indoors, especially at night or in spring.
- Faint rustling in walls and discarded wings from swarmers.
- Damage tends to concentrate around leaks, bathrooms, windows, and rooflines.
How to Control Carpenter Ants
Spraying trailing ants does not address the colony, which may be inside a wall or in a tree or stump outdoors. Effective control finds and treats the nest and removes the moisture that attracted them.
- Fix leaks, improve drainage, and replace water-damaged wood.
- Trim branches touching the roof and move firewood away from the house.
- Seal entry points around utilities, eaves, and the foundation.
- Use ant baits the colony carries back to the nest and confirm the trail to its source.
Fix Moisture & Bait
Correct the moisture source and use baits that reach the nest, not just contact spray.
Explore services →Prevent Return
Seal entry points and keep wood dry so colonies cannot re-establish.
Request an estimate →Treatments are selected and applied per their labels. Tell us about children, pets, edible gardens, beehives, and other sensitive areas before service, and follow all preparation and re-entry instructions. More on pet- and pollinator-conscious treatment →
Common Questions
Are carpenter ants as damaging as termites?
They are usually slower and less destructive than subterranean termites, but a long-established colony can still cause meaningful damage, especially in chronically damp wood.
Does seeing carpenter ants mean I have a leak?
Often, yes. They favor wood softened by moisture, so indoor carpenter ants frequently point to a leak, drainage issue, or condensation worth investigating.
Why didn't spraying get rid of them?
Spraying the workers you see leaves the nest intact. Baiting and treating the actual nest, plus fixing the moisture, is what resolves the problem.
Sources & Further Reading
Guidance changes over time. Follow current product labels and local recommendations. This page is educational and is not medical advice.
Need Help With Carpenter Ant?
Call or email for a free estimate. We’ll recommend an approach that fits your property.