How to Get Rid of Carpenter Ants in Kitchen

Carpenter ants are not just a nuisance — they're a structural threat. Unlike termites, they don't eat wood, but they excavate it to build their nests, causing significant damage over time. Finding carpenter ants in your kitchen requires prompt action.

How to Identify Carpenter Ants

Large — 6 to 12mm, significantly bigger than common house ants
Black, red, or a combination of both
Smooth, rounded thorax (no bumps)
Often seen individually rather than in trails
May have wings (reproductive ants in spring)
Active at night — you may hear faint rustling in walls

Why They're in Your Kitchen

Carpenter ants are attracted to moisture-damaged wood. In kitchens, common problem areas include:

Wood around leaky pipes under the sink
Window frames with moisture damage
Wooden cabinets near the dishwasher or sink
Subfloor damage from long-term leaks

They also forage for food — particularly sweets and proteins — which brings them into the kitchen even if the nest is elsewhere in the home.

Step 1: Find the Moisture Source

Carpenter ants almost always nest in or near moisture-damaged wood. Inspect under the sink, around the dishwasher, and near any windows for soft, discolored, or water-damaged wood. Fix any leaks immediately — without addressing the moisture, the infestation will return.

Step 2: Locate the Nest

Follow carpenter ants at night when they're most active. They'll lead you toward the nest. Listen for faint rustling or crinkling sounds inside walls — this is the sound of ants excavating wood. Common nest locations include wall voids near plumbing, hollow door frames, and under flooring near moisture.

Step 3: Apply Boric Acid to the Nest

If you can access the nest cavity, apply Ecoxall Boric Acid powder directly into the void. Boric acid kills carpenter ants through ingestion and contact and can be injected into wall voids through small drilled holes. It's a low-toxicity option that's effective against the colony.

Step 4: Use Bait for Foraging Ants

Place TERRO Ant & Roach Bait Stations along foraging trails in the kitchen. While carpenter ants prefer protein, they also consume sweet bait — especially when other food sources are removed. The slow-acting formula allows workers to carry bait back to the colony.

Step 5: Seal Entry Points

Seal all gaps around pipes, baseboards, and window frames with clear silicone caulk to prevent re-entry once the colony is eliminated.

When to Call a Professional

Carpenter ant infestations that have been established for more than a few months may involve extensive wood damage and multiple satellite nests. If you find sawdust-like frass (wood shavings) in cabinets or walls, or if the infestation persists after treatment, call a licensed pest control professional. The structural damage assessment alone is worth a professional inspection.

Prevention

Fix all leaks and moisture issues promptly
Replace any moisture-damaged wood
Keep wood surfaces in the kitchen dry
Seal all exterior entry points
Store firewood away from the house — it's a common carpenter ant harborage

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