How to Get Rid of Rats: Snap Traps, Sealing, and What Actually Works

Rats are smart, fast-breeding, and destructive, but they are beatable with the right approach. The mistake most people make is reaching for a plug-in repeller or a box of poison first. Neither solves a rat problem. What works is unglamorous and proven: take away their food, seal the gaps they get in through, and snap-trap them the right way.

The short answer: identify whether you have ground-dwelling Norway rats or climbing roof rats, because it changes where you place traps. Then remove food and clutter, seal every opening larger than a quarter inch with steel or hardware cloth, and set plenty of snap traps where the rats actually travel. Pre-bait the traps unset for a few days first so the rats lose their fear of them. Save poison for a last resort, and skip the ultrasonic gadgets entirely.

First, Identify Your Rat

The two rats in US homes behave very differently, and that decides where your traps go. Get this right before you set a single trap. For more detail, see our guide to the different types of rats.

Feature	Norway rat (brown rat)	Roof rat (black rat)
Build	Larger, stockier	Smaller, sleeker
Nose	Blunt	Pointed
Tail	Shorter than head and body	Longer, reaches the snout
Lives and nests	Burrows at ground level: basements, foundations, woodpiles, sewers	Climbs: attics, upper walls, rafters, trees, dense vines
Where to trap	Low, along walls and near burrows	Up high, on ledges, beams, and rafters

This is the single most important decision you will make. Setting ground traps for a roof rat living in your attic, or vice versa, is the number one reason traps sit empty.

Signs You Have Rats

Confirm the problem and find the hot spots before you treat. Look for dark, capsule-shaped droppings, gnaw marks on wood and packaging, greasy rub marks along walls, scratching or scurrying sounds in walls and ceilings at night, and burrows or runways outside. Our guides on the signs of rats, telling rat droppings from mouse and squirrel droppings, and what rat holes look like help you read the evidence.

How to Get Rid of Rats, Step by Step

1. Remove their food and shelter

Rats stay where there is food and cover. Keep garbage in tight-lidded cans, store dry food and pet food in sealed metal or glass containers, do not leave pet bowls out overnight, and clean up fallen birdseed and fruit. Clear clutter indoors and out, keep a couple of feet of clearance between shrubs and the house, and trim tree limbs back several feet from the roof, since those are highways for roof rats.

2. Seal them out

A rat can squeeze under a gap as small as half an inch, so seal every opening larger than a quarter inch. Use steel wool packed tight, coarse steel mesh, hardware cloth, sheet metal, or cement. Do not use plastic, wood, expanding foam, or caulk alone, because rats chew straight through them. Check around pipes, vents, the foundation, the roofline, and under doors. Exclusion is what makes the fix permanent.

3. Set snap traps the right way

Snap traps are the safest, most effective, and most economical way for a homeowner to kill rats. They beat poison indoors because you control the carcass, there is no dead rat rotting in a wall, and there is no risk of poisoning pets or wildlife. Do it properly:

• Use plenty. Too few traps is the most common mistake. For an active infestation, set a dozen or more, spaced about ten to twenty feet apart.
• Place them where rats travel. Set traps against walls with the trigger end nearly touching the wall, in dark corners, and along runways where you found droppings. For roof rats, secure traps up high on beams, ledges, and rafters.
• Pre-bait to beat their caution. Rats fear new objects and will avoid a fresh trap for days. Leave traps baited but unset until the bait is being taken regularly, then set them. This one step dramatically raises your catch rate.
• Bait small. A pea-sized dab of peanut butter, or a bit of nut, dried fruit, or bacon, works better than a big glob. Secure it so the rat has to work the trigger.

If your traps keep coming up empty, read our guides on why rats are not eating your bait and how to catch a smart rat.

4. Use poison only as a last resort

Rodenticide is the tool of last resort, not the first move, and indoors it causes more problems than it solves. Poisoned rats die in wall voids and under floors, leaving weeks of odor and flies, and the bait risks poisoning pets and the owls and hawks that eat the dying rats. Federal rules now keep the strongest second-generation poisons out of consumer hands, and consumer bait must come in tamper-resistant stations, never loose pellets. If you use bait at all, use a sealed, tamper-resistant station outdoors near the structure, after you have done the sanitation and sealing above.

Do Rat Repellents Actually Work?

This is where most money gets wasted. Here is the honest picture.

Method	What the evidence says	Verdict
Ultrasonic and electronic repellers	Rats quickly get used to the sound and ignore it; the FTC has warned makers their claims lack scientific support	Does not work
Peppermint oil	No real evidence it clears an infestation; any effect fades fast as rats habituate	Myth
Mothballs	Ineffective against rats at legal amounts, and using them this way is against the label and illegal	Avoid

The honest takeaway: no smell or sound reliably evicts rats. See our deeper look at whether peppermint oil repels rats. Spend your effort on sealing and trapping instead.

Are Rats Dangerous? Disease and Safe Cleanup

Yes. Rats can spread hantavirus, leptospirosis, rat-bite fever, and salmonella through their droppings, urine, and bites, and their gnawing on wiring is a real fire hazard. One myth worth correcting: rats almost never carry rabies, and there is no documented case of a rat giving rabies to a person, so that is not the danger to worry about.

Cleaning up droppings and nests safely matters, because disturbing them the wrong way can put viruses into the air. Follow the method public-health agencies recommend:

• Do not sweep or vacuum droppings, urine, or nests, since that sends contaminated particles airborne.
• Air out the space first: open windows and doors and leave the room for about 30 minutes.
• Wear rubber or plastic gloves.
• Spray the droppings and nests with a disinfectant or a bleach solution of about 1.5 cups of bleach per gallon of water, and let it soak for five minutes.
• Wipe everything up with paper towels and seal it in a bag.
• Double-bag dead rats and used traps, knot each bag, and put them in a covered trash can, then wash your hands.

Our full guide covers how to safely clean up rat and mouse droppings, and whether rats carry rabies goes deeper on that question.

Getting Rats Out of Specific Places

• Attic: almost always roof rats. Find their entry along the roofline, seal it, and set traps up on the beams and rafters where they run, not on the attic floor.
• Walls: locate the entry points and runways, seal the gaps, and set traps at the openings where they emerge into rooms. Avoid poison here so a rat does not die inside the wall.
• Yard and garden: remove harborage like woodpiles and dense ground cover, collect fallen fruit and birdseed, and treat active burrows. Outdoor tamper-resistant bait stations are most appropriate here.
• Garage and under the house: clear clutter, seal the gaps, and trap along the walls where Norway rats travel.

For the overall approach across rats and mice, see our guide to rodent pest control and the dedicated roof rat control guide.

When to Call a Professional

Handle most rat problems yourself with sealing and trapping. Call a pro when the infestation is large or keeps coming back, when the rats are in hard-to-reach wall voids or crawl spaces you cannot access, or when you cannot find where they are getting in. A professional can locate hidden entry points, place traps where they matter, and handle the exclusion work safely.

How to Keep Rats From Coming Back

• Keep food, including pet food and birdseed, in sealed rodent-proof containers.
• Take out the trash regularly and keep cans tightly lidded.
• Seal new gaps as they appear and re-check your steel-wool and mesh patches each season.
• Cut back vegetation from the house and keep tree limbs trimmed away from the roof.
• Clear clutter in the garage, basement, and yard so rats have nowhere to nest.

Related Rat and Rodent Guides

• Types of rats in your home
• How to get rid of roof rats
• Signs of rats
• What do rat holes look like
• Why rats are not eating your bait
• How to catch a smart rat
• Safely clean up rat droppings
• Do rats carry rabies?
• Rodent pest control

Frequently Asked Questions

What kills rats instantly?

No home method is truly instant. A well-placed, pre-baited snap trap is the fastest and most reliable way for a homeowner to kill a rat, while poison takes several days to work. Be wary of any product promising an instant kill.

How do I get rid of rats fast?

Do three things at once: remove their food and clutter, seal every gap larger than a quarter inch with steel or hardware cloth, and set plenty of pre-baited snap traps placed for your rat type, low for Norway rats and high for roof rats. Doing all three together is what clears them quickly.

What smell do rats hate?

None reliably enough to matter. Peppermint, ammonia, and mothballs are popular but do not clear an infestation, and rats quickly get used to them. Sealing and trapping work; scents do not.

Do rats leave on their own?

No. As long as there is food and shelter, rats stay and breed quickly, with several litters a year. They only leave when you remove the food, the shelter, and the way in.

Are rats in the house dangerous?

Yes. They can spread diseases like hantavirus, leptospirosis, and salmonella, contaminate food, and gnaw through wiring, which is a fire risk. Rabies, however, is not a meaningful risk from rats.