A trail on the kitchen counter, sawdust under a window or a mound by the patio each points to a different plan. Use Call Now to describe where you see them and you will be connected with an independent provider serving the Madison area.
Ants you are likely to find in a house
Odorous house ants
These small ants are dark brown to black and give off a smell like rotten coconut when crushed. Their large colonies settle in wall voids, beneath sinks and in landscaping, and the workers trail toward sweet foods and water.
Pavement ants
A dark brown ant that nests beneath slabs and driveways and in sidewalk cracks, pushing up little mounds of soil next to the pavement. Workers get in through cracks in the slab and haul food back to the colony.
Carpenter ants
Large black or red-and-black ants that excavate damp or damaged wood. Piles of coarse sawdust-like frass, rustling in walls and winged ants in spring are signs of a nest nearby.
Argentine ants
In warm regions this light-to-dark brown ant forms huge, connected colonies, and long columns of workers run up the walls, particularly after rain or during dry spells.
Ant prevention you can do this week
- Trim plants so nothing touches the house, and keep mulch a few inches from the foundation
- Store food, pet food and sugary items in sealed containers and wipe crumbs at night
- Seal visible gaps with caulk and add door sweeps
- Fix dripping faucets and wet spots under sinks
- Take out trash and recycling often, and rinse containers
Why bait beats spray for most ants
Killing the ants you can see only removes trail workers; the colony carries on. Bait that acts slowly gets taken back to the nest and shared, which cuts down the queen and brood. Gel baits and granular baits go along the trails, and a perimeter treatment using a non-repellent product puts a barrier in place outdoors.
Repellent sprays and wipes can scatter a colony into several new ones. Resist the urge to clean the trail with spray until the bait has worked.
Where ants get into the home
- Utility lines, dryer vents and AC lines entering the wall
- Door thresholds, weather stripping and window frames
- Gaps around plumbing under sinks and behind appliances
- Tree limbs, shrubs and vines that touch the roof or siding
- Cracks in the foundation and slab expansion joints
Moisture, wood and carpenter ant damage
Wood is not food for carpenter ants; they hollow it out to nest in, and wood that leaks, condensation or rot have already softened is what they choose. To find the nest, find the moisture behind it, which might be a roof leak, a window seal that is failing, a deck built against siding or a clogged gutter.
If the ants are treated and the water problem is left alone, the wood stays soft and the ants are likely to come back. The complete answer from a provider includes locating the moisture source and telling you to repair it.
How an ant control visit works, step by step
Pest visits that are done properly run in a fixed order, no matter which insect or animal is involved. Keep that order in mind when you talk to different companies, because a visit that leaves out the opening steps is the one to question.
- Inspection: the technician walks the outside first (foundation, vents, utility lines, eaves, fence lines, mulch) and then the inside (kitchen, bathrooms, garage, attic or crawl space).
- Identification: the species is named from the insect, droppings, damage or trail, because the right product and method depend on it.
- Plan: the provider explains what will be done, which products or devices will be used, and what you need to do before and after.
- Treatment or exclusion: the work is done in the places the inspection found, not by spraying every room.
- Follow-up: you get a date for the next check and a clear answer on what to report if activity returns.
What makes ant control different in Madison
Madison sits on an isthmus between Lake Mendota and Lake Monona, so water, marsh edges and shoreline vegetation shape the mosquito and insect season. The University of Wisconsin campus and the large rental market mean frequent turnover, which raises the risk of bed bugs and cockroach spread in multi-unit buildings.
Cold winters push mice and overwintering insects into homes, garages and attics from fall. Older neighborhoods have mature trees and wood features that suit carpenter ants when moisture is present. Ask any provider how these local details change the plan for your address, because a method that works in one climate or housing style can fail in another.
Ant control across Madison and nearby cities
In Madison, Wisconsin, Pest Control in Madison serves ZIP codes: . Providers working in Middleton, Fitchburg, Sun Prairie, Verona and Monona also receive calls and requests. Each address is checked individually, which is why it helps to give your ZIP code on the call.
To get going, press Call Now at the top of any page and tell the person who answers what you found. That puts you through to an independent provider nearby, and the provider verifies your address, looks the property over and writes up the scope.
Related help in Madison
If this is not quite your situation, these pages cover the neighboring questions: Cockroach control; Signs and inspection: pest control; Rodent control; Termite inspection and control. The service area list shows every nearby city and ZIP code covered.