How Do Exterminators Get Rid of Rats?

The inspection maps where the rats live, where they travel and how they get inside, and every later step depends on it. It covers the house inside and out, plus the yard.

Outside, the technician looks for:

• Burrows along the foundation, under slabs, sheds and woodpiles, and beneath compost or garbage cans
• Runs, the worn paths rats use along fences, walls and foundations
• Smudge marks, the dark rub lines UC IPM describes where rats brush their fur against beams, pipes and walls
• Travel routes above ground: utility lines, fence tops and tree limbs that reach the roof

On the house itself, the checks follow how Chesapeake homes are built. In the ZIP code area that covers much of Great Bridge and southern Chesapeake, 87.3% of housing units are single-family detached homes, and on houses like these the gaps tend to be at garage door seals, brick-veneer weep holes, soffit returns, roofline gaps, and the holes cut for HVAC lines, dryer vents and utilities. Inside, the crawl space, attic and garage all get checked on every job.

By the end of this step, the technician knows where the rats are nesting, where they feed and every opening they use.

Identifying the species tells the technician where to put traps and which openings matter most. Chesapeake homes deal with two rats, and they live very differently.

	Norway rat	Roof rat
Nests	Burrows along foundations, under trash piles and woodpiles	Above ground: shrubs, trees, dense vegetation
Indoors	Basement and ground floor	Attic spaces, walls, false ceilings
Droppings	3/4 to 1 inch long	About 1/2 inch long
Movement	Strong swimmer	Agile climber

Sources: UC IPM for habits; Cornell University for dropping size.

The species changes the plan. Norway rats point the work toward burrows, the crawl space and ground-level gaps. Roof rats point it toward the attic, the roofline and overhanging limbs. Of the two, UC IPM rates roof rats as the warier around anything new, so an attic roof rat job usually needs more patience at the trapping stage.

This step removes the active population using traps, bait stations and burrow treatment, chosen to fit the species and the property.

Traps. UC IPM calls snap traps “the safest, most effective, and most economical way to trap rats.” Its placement guidance is specific: set rat traps “about 10 to 20 feet apart,” along walls and where droppings are found for Norway rats, and in off-the-ground spots such as ledges, shelves, pipes and overhead beams for roof rats.

Prebaiting. Rats are suspicious of anything new, so a technician often starts with traps that are baited but not set. UC IPM describes this as a way to reduce trap shyness: “leave traps baited but unset until the bait has been taken several times.” Once the rats are feeding confidently, the traps are set.

Bait stations. Outdoors, Chesapeake Rodent Control places exterior bait stations where rats travel. UC IPM requires tamper-resistant bait stations wherever children, pets, nontarget mammals or birds could reach the bait.

Burrow treatment. Active burrows and nesting sites are treated as part of the rat job. This is professional work, and we do not publish methods for homeowners to copy. If you are seeing holes in the yard, our page on rat burrows explains how to tell whether a burrow is active.

Every catch is removed and disposed of, and this step is a safety measure as much as a tidy one. The EPA tells anyone using rodent bait to “promptly remove and dispose of carcasses of dead rodents” so that wildlife and pets that might eat them are not poisoned too.

On each visit, the technician:

1. Clears and resets traps that have caught rats.
2. Bags catches for disposal, following CDC guidance to double-bag dead rodents.
3. Shifts traps that have stayed untouched toward the areas with fresh signs.

Where the catches come from is useful information. A cluster of catches near one corner of the foundation usually points straight at the entry point that matters most in Step 5.

Never handle a dead rat with bare hands. If you find one before the technician arrives, wear gloves, spray it with disinfectant, and double-bag it as the CDC describes.

Sealing closes every opening rats can use, so new rats cannot replace the ones caught. UC IPM says all holes larger than 1/4 inch should be sealed to keep out both rats and mice, and notes that a rat can squeeze beneath a door with only a 1/2-inch gap.

Materials decide whether the seal holds. UC IPM warns that rats can chew through plastic, foam, wood and caulk. A professional seal uses hardened materials cut to each gap, and our rodent proofing page shows what that covers on a Chesapeake house.

Timing matters as much as materials:

• Exterior gaps are closed early. UC IPM advises minimizing entry points before baiting outside, “to prevent poisoned rats from coming inside to die.”
• Interior voids are sealed last, once the rats inside have been caught, so none are walled in.

The follow-up visit confirms the rats are gone rather than assuming it. Because rats avoid new objects, the last few animals are often the most cautious ones, and only a return visit finds them.

The job is finished when the evidence stops:

• No fresh droppings on surfaces that were cleaned
• No new gnaw marks or smudge marks
• Bait left untouched in the stations
• No new catches
• Burrows that stay closed

UC IPM suggests a useful check during trapping: if bait is taken from every trap, double the number of baited traps until some bait goes untouched. When bait starts sitting untouched, the population is shrinking.

Professional rat removal in Chesapeake costs $150 to $220 per visit for rat treatment with Chesapeake Rodent Control. Sealing and follow-up visits are priced separately, and crawl space, attic and cleanup work are priced after inspection. Our rodent control cost guide for Chesapeake lists every visit price, and the exact cost is confirmed before anything is booked.

To book an inspection, see how our rat control service works or call (757) 551-3952 for a free callback.