Roswell Rodent Control: Identifying Rats and Mice Before You Trap

What to look for

University of Georgia Extension states that all three commensal rodents live in Georgia: the house mouse, the Norway rat and the roof rat. Identification matters because each one uses a house differently. Roof rats climb. They follow tree limbs, vines, fences and utility lines to the roofline and nest in attics and upper walls. Norway rats dig, building burrows under slabs, decks, sheds and dense shrubs, then entering from ground level. House mice settle in kitchens, cabinets and wall voids, rarely straying more than 5 to 10 feet from a wall. Roswell's climate keeps all three going. About 54 inches of rain a year and 70% average humidity produce thick vegetation, fruiting plants and plenty of insects, which feed rodents outdoors through spring and summer. Summer highs reach 89F, and winter lows average only about 32F, so cold snaps are short. Rodents in subtropical Georgia stay active year-round, but many households notice a surge in fall, when cooler nights and shrinking food supplies send rats and mice toward attics, crawl spaces and garages.

• 1Running or scratching overhead at night, a strong hint that roof rats are using the attic.
• 2Burrows with fresh soil next to a slab, deck or shed, which points to Norway rats.
• 3Droppings in a kitchen drawer or under the sink, often from house mice.
• 4Chewed fruit left hanging on trees or fallen fruit with hollowed-out centers.
• 5Gnawed holes in soffits, vent screens or the corners of garage doors.
• 6Dark rub marks along beams, pipes or the top of a wall where rats travel.
• 7A musky smell in the attic or a closet that gets stronger in warm weather.

Treatment options and typical costs

Prices are typical published ranges. Ask what’s included before you compare quotes.

Roof rat, Norway rat or house mouse: which one is in your Roswell home?

If the activity is low, with burrows beside a slab, deck or shed and gnawing at the base of a garage door, think Norway rat. These heavier rats live in the ground and come into crawl spaces and garages from below. UGA notes a Norway rat may live its whole life within a circle 100 to 150 feet across. If you see small droppings in a kitchen drawer or behind the stove and nothing in the attic, house mice are the likely answer. They hug walls and rarely wander more than 5 to 10 feet from one. Start with where the evidence is, because that usually tells you which rodent you have. UGA Extension points out that Georgia has all three commensal species, and identification drives where traps belong. If you hear running overhead at night and find droppings in the attic or on top of cabinets, think roof rat. Roof rats are slender, agile climbers that reach Roswell rooftops along tree limbs, vines and utility lines. Hollowed-out fruit in the yard is another clue.

Why does UGA recommend about a dozen traps for rats?

For roof rats in a Roswell attic, that means traps along top plates, rafters and the edges of the insulation where droppings collect. For Norway rats, it means traps or covered boxes along foundation walls, fences and burrow entrances, spread across the 100 to 150 foot circle the colony uses. Mice follow similar logic on a smaller scale. Because they stay within 5 to 10 feet of a wall, traps placed in open floor space are mostly wasted. Line them up along baseboards near droppings and check them daily. Because a few traps lose the race against breeding. UGA Extension's Circular 970, revised in November 2025, recommends roughly a dozen traps per house when rats are present, set perpendicular to the walls along the routes they use. Rats are cautious around new objects, and they travel set paths. A single trap in the wrong spot may never be touched, while a line of traps across a known runway gives several chances each night. Setting them perpendicular to the wall, trigger end toward it, catches rats traveling in either direction.

What does a rodent year look like in Roswell?

Fall is the surge. Cooler nights and declining food push rodents toward warm, sheltered spaces, and many households first hear noise in the attic or find droppings in the kitchen between September and November. Sealing vents and trimming branches before then pays off. Through winter, rodents already inside keep breeding. UGA Extension notes mice can start producing litters at two months and repeat about every 30 days, so a fall arrival can become several generations by spring if entry points stay open. In Roswell there is no true off-season, only busier and quieter stretches. Winter lows average about 32F, and cold snaps pass quickly, so outdoor rodents keep feeding through most months. From spring into summer, about 54 inches of annual rain and 70% humidity drive heavy plant growth, fruit and insect populations. Roof rats nest in trees and attics, Norway rats breed in burrows, and mice live in yards and outbuildings. Summer highs near 89F can make attics hot, but roof rats often stay anyway if the food is close.

How should a house be sealed against rodents?

Branches and vines touching the house need to come back first, or sealing just redirects rats to the next gap. At ground level, check crawl space vents and doors, gaps under the garage door, utility penetrations through the foundation and any cracks in slabs. Norway rats will chew at weak materials, so foam or caulk alone tends to fail. If your home is one of the older buildings in or near the historic district, expect more places to check: settling foundations, original trim and old chimney flues can all hide openings that a quick walkaround misses. Seal to the standard UGA Extension sets: hardware cloth with 1/4-inch squares, backed by sheet metal or sealant where needed. Rodents can push through an opening about the size of a dime, so anything larger than that is a doorway. On a Roswell house, the roofline deserves special attention because roof rats arrive from above. Look at gable vents, soffit vents, ridge vents, gaps where the roof meets a chimney or dormer, and the spots where cables and AC lines enter the siding.

When does a rodent problem become urgent?

Wiring damage is the other emergency. Roof rats nest in attics, and attics carry wiring. If you find chewed cable sheathing, turn off that circuit if you can do so safely and have an electrician check it. In Roswell's warm months, a dead rodent in a wall or attic also becomes urgent quickly because of the smell and the flies it draws. If any of these apply, ask a provider how soon they can inspect, and ask whether cleanup and insulation replacement are part of their plan or a separate job. Treat it as urgent when rodents are in living spaces, when you see chewed wiring, or when droppings are showing up on food prep surfaces. Those three situations carry fire risk or disease risk, and they rarely improve on their own. The CDC lists leptospirosis, salmonellosis, rat-bite fever and several other diseases among those rodents spread directly to people, through droppings, urine, bites or contaminated food. Anyone with a weak immune system, a newborn in the house, or a pet that has been catching rodents raises the stakes.

Simple ways to keep rodents away

• Trim tree branches and shrubs so nothing touches the roof or siding.
• Cut back vines growing on walls, fences and utility poles near the house.
• Cover vents with hardware cloth that has 1/4-inch squares.
• Pick up fallen fruit and nuts and keep pet food indoors overnight.
• Keep trash and compost bins lidded and away from the foundation.
• Clear dense ground cover along the foundation so burrows stay visible.
• Seal openings around pipes, cables and AC lines with metal or mesh, not foam alone.
• Store bird seed and grass seed in metal cans in the garage.

Questions people ask

Nearby cities

Related guides