Black carpenter ant
The big one, roughly a quarter to half an inch long for workers, dull black with fine gold hairs on the abdomen and a smoothly rounded back. Nests in damp or decaying wood and excavates galleries. Most active at night.
Carpenter, pavement, odorous house and acrobat ants
Ant Control and Carpenter Ant Exterminators in Orange County, NY
Not every ant is a crisis. A few pavement ants on the patio door are a nuisance. Large black carpenter ants inside in April are a sign that wet wood somewhere in the house is being hollowed out. A local pro can tell you which one you have and treat it the right way.
- Nest location, not just spraying
- Moisture and wood damage checks
- Pet-conscious baiting
32 requests from Orange County today · last one 25 min ago
Know your ant
The four ants that cause most Orange County calls
Treatment depends completely on the species, so this is the first thing a technician figures out.
Pavement ant
Small, dark brown to black, about an eighth of an inch, with faint grooves on the head and thorax. Nests under slabs, sidewalks and patio pavers and pushes little piles of sand out of expansion joints. Comes in for grease and sweets.
Odorous house ant
Tiny, brown to black, moving fast in long trails along countertops and baseboards. Crush one and it smells like rotten coconut. Colonies have many queens and split easily, so they rebound after random spraying.
Acrobat ant
Small, often two-toned with a heart-shaped abdomen they flip up over their back when disturbed. Nest in moist or previously damaged wood, foam board insulation and old carpenter ant galleries. They can bite.
Carpenter ants up close: what they are doing in your walls
Carpenter ants do not eat wood. They chew it out to make room for the colony and push the debris out of the nest, which is why the classic sign is a small pile of coarse, sawdust-like material called frass below a window sill, door frame or baseboard. Look closely at frass and you will usually see bits of insect parts and dead ants mixed in. Termites do not leave anything like it.
A mature carpenter ant colony is usually split up. The parent colony, with the queen, eggs and young larvae, tends to be outside in a moist, partly rotted tree, stump, landscape timber or old fence post. Satellite nests of workers and older brood can be inside the house in a wall void, a hollow porch column, the wood around a leaky skylight or a sill plate that stays damp. Workers travel between the two, often at night, along tree limbs that touch the roof, utility lines and the tops of foundations.
In spring, mature colonies release winged swarmers. Seeing winged carpenter ants inside in April through June is a strong sign there is a nest in the structure, not just foragers wandering in. Many people mistake them for termite swarmers. Our termite control page explains the difference, but the short version: ants have a pinched waist and elbowed antennae, termites do not.
How much damage carpenter ants do depends on how long they have been working and how wet the wood is. They are rarely a structural emergency in a few months, but an established colony in a damp roof edge or window header over several years can do real harm, and the wet wood they are living in is a problem by itself.
Big black ants inside before the snow is gone?
Carpenter ants active indoors in late winter almost always mean a nest inside the heated house. That is worth a call to a local technician.
34 pest calls from the Orange County area today. Most recent: 26 minutes ago.
Clues that carpenter ants have moved in
- Frass piles under windows, doors or baseboards
- Large black ants in the kitchen or bath at night
- Winged ants indoors in spring
- A faint rustling inside a wall or hollow door
- Ant trails along the top of the foundation
- Soft, damaged wood near a leak or gutter overflow
- Workers coming and going from a deck post or porch column
- Ants traveling along an overhanging branch onto the roof
Why Orange County is carpenter ant country
Much of the county is wooded, and carpenter ants are forest insects first. Homes on the ridges around Cornwall and the Hudson Highlands, along Schunnemunk, near Sterling Forest and in the wooded subdivisions of the Monroe, Woodbury and Tuxedo area have parent colonies in stumps, dead limbs and woodpiles all around them. It does not take much for foragers to find a damp corner of the house.
Lake houses get hit hard. Around Greenwood Lake, Orange Lake and the lake communities near Monroe, older cottages with shaded north walls, aging decks and wood that stays wet from lake humidity are ideal. Seasonal homes are worse, because a small leak can go unnoticed for months while a satellite nest grows in the soaked wood.
The county's older housing adds to it. Many 19th century homes in villages like Warwick, Goshen and Walden have wooden porches, original window frames and sill plates sitting close to grade. Add ice dams in February and spring downpours, and there is always some wood in the county getting wet enough to attract ants.
Pavement ants and odorous house ants, on the other hand, are everywhere: newer slab homes in the Town of Wallkill, townhouses in New Windsor, apartments in Middletown. They are less of a threat to the house and more of a test of your patience in May and June.
Where each ant nests and how it gets treated
| Ant | Usual nest site | What works |
|---|---|---|
| Carpenter ant | Damp or decaying wood, wall voids, porch columns, stumps outside | Locate nest, dust or foam into galleries, non-repellent perimeter treatment, fix the moisture |
| Pavement ant | Under slabs, sidewalks, pavers and along foundations | Baits along trails and cracks, perimeter treatment, seal slab cracks |
| Odorous house ant | Under mulch, stones, in wall voids near warmth and moisture | Slow-acting baits, non-repellent products, avoid repellent sprays that split colonies |
| Acrobat ant | Moist or damaged wood, foam insulation, old carpenter ant galleries | Find and treat the void, address water intrusion, trim branches |
How a technician handles an ant job
Trace the trail
Ant work starts with following ants, often at night for carpenter ants. The tech identifies the species, looks for frass and checks for moisture with a meter in suspect spots like window sills, bathroom floors and the rim joist under a deck ledger.
Treat the nest, not the kitchen
Depending on the ant, that means baits workers carry back to the colony, insecticidal dust or foam injected into galleries and wall voids through small holes, and a non-repellent treatment around the foundation so foragers carry it home without noticing.
Fix what attracted them
You will get a list: branches touching the roof, mulch piled against siding, a clogged gutter, a leaking skylight, firewood on the porch. Without those fixes, carpenter ants tend to return the next spring.
Searching "ant exterminator near me" in Orange County?
If you are seeing ants and searching for "ant exterminator near me" or "carpenter ant control near me," the most useful thing a local company brings is familiarity with the houses around you. Someone who works the Warwick Valley every week knows where lake cottages and old farmhouses tend to hide moisture. Someone in the Middletown and Wallkill area knows the slab-and-paver neighborhoods where pavement ants never quit.
We connect you with independent pest control companies near you at no cost. Describe the ant, or send a description of what you are seeing when you call, and you will be talking to a technician who can tell you whether it is worth a visit.
Put down the bug spray (for now)
Spraying a trail of odorous house ants with a store-bought repellent kills the ants you see and often splits the colony into several new ones, a behavior called budding. A week later you have three trails instead of one. With carpenter ants, spraying foragers does nothing to the nest. If you want to try something yourself first, a slow-acting bait placed on the trail is a better choice than any aerosol.
Cost factors and when DIY makes sense
A spring visit for pavement or odorous house ants is usually a straightforward, single-treatment job, sometimes with a follow-up. Carpenter ant jobs vary more. The price depends on how quickly the nest can be found, whether walls or soffits need to be drilled for treatment, how big the house and foundation perimeter are, and whether there are multiple satellite nests. Homes on wooded lots often do best on a seasonal plan with a spring and early summer treatment, since new colonies move in from the woods.
DIY is reasonable for small sugar or grease ants in the kitchen: clean up crumbs, wipe trails with soapy water and use bait stations. It is not a good idea for carpenter ants inside the walls, ants that keep coming back after baiting, or any situation where you have found soft or damaged wood. Those call for someone who can find the nest and check for hidden moisture.
If the technician finds wood that is badly damaged, the next call is to a carpenter, and sometimes a roofer or gutter installer. That repair is separate from the pest work.
Keeping ants out of an Orange County home
- Trim tree limbs and shrubs so nothing touches the roof, siding or utility lines.
- Keep mulch a few inches below the siding and pulled back from the foundation.
- Clean gutters every fall and after big storms so water does not soak the fascia and soffit.
- Store firewood away from the house and bring in only what you will burn that day.
- Replace rotted deck boards, porch columns and window sills instead of painting over them.
- Run a dehumidifier in damp basements and crawlspaces.
- Caulk gaps around windows, doors and where utility lines enter.
Ant questions homeowners ask us
How do I know if the carpenter ants are nesting inside or just visiting?
Ants active indoors during winter, winged ants inside in spring, and frass piles are strong signs of an indoor nest. A few workers wandering in through an open door in July, with none of those signs, are more likely foragers from outside.
Can carpenter ants make a house collapse?
That is very rare. The real concern is long-term damage to specific pieces of wood, like a window header or porch beam, and the moisture problem that attracted them. Both are worth fixing sooner than later.
Why do the little ants keep coming back after I spray?
Odorous house ants and pavement ants have big colonies, and repellent sprays only kill the workers that touch them. Baits that workers carry back to feed the colony and queens work far better.
Is ant treatment safe for kids and pets?
Professionals use targeted baits, crack and crevice treatments and products applied outside or inside wall voids rather than broadcast spraying. Commercial applicators in New York must be DEC certified. Ask what will be used and how long to keep pets away from treated areas.
Ant control, town by town
Lake cottages, river towns, farm villages and new subdivisions all have their own ant habits. Find your part of Orange County below.
Newburgh & the Hudson Riverfront
- Newburgh
- Town of Newburgh
- Balmville
- Gardnertown
- Orange Lake
- New Windsor
- Vails Gate
- Rock Tavern
- Cornwall
- Cornwall-on-Hudson
- Mountainville
- Highland Falls
- Fort Montgomery
Middletown & the Town of Wallkill
- Middletown
- Town of Wallkill
- Scotchtown
- Circleville
- Mechanicstown
- Howells
- Wawayanda
- Slate Hill
- New Hampton
- Mount Hope
- Otisville
Montgomery, Walden & Pine Bush
- Montgomery
- Town of Montgomery
- Walden
- Maybrook
- Pine Bush
- Crawford
- Bullville
- Thompson Ridge
- Campbell Hall
- Hamptonburgh
Goshen, Chester & Blooming Grove
- Goshen
- Chester
- Sugar Loaf
- Washingtonville
- Blooming Grove
- Salisbury Mills
- South Blooming Grove
Monroe, Woodbury & Tuxedo
- Monroe
- Harriman
- Central Valley
- Highland Mills
- Woodbury
- Kiryas Joel
- Tuxedo
- Tuxedo Park
- Southfields
Warwick Valley & the Black Dirt Region
- Warwick
- Greenwood Lake
- Florida
- Pine Island
- Bellvale
- New Milford
- Minisink
- Westtown
- Unionville
- Johnson
Port Jervis & the Upper Delaware
- Port Jervis
- Deerpark
- Huguenot
- Cuddebackville
- Sparrowbush
- Westbrookville
- Greenville
Find the nest, fix the moisture, end the trails.
Talk to a local Orange County ant specialist today. The call and the referral are free.