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Rodents

Signs of Rats or Mice in Your Attic and How to Get Them Out

The Koalaty Team November 11, 2026
Attic rafters and insulation lit by a flashlight with a black rodent bait station on a joist

The attic is one of the favorite winter homes for rats and mice in central Oklahoma. It is warm, quiet and full of insulation for nesting. Because few people go up there, an infestation can grow for weeks before anyone notices. By the time the scratching gets loud enough to wake you up, rodents have often been chewing, nesting and leaving droppings for a while. Here is how to tell if you have rodents in the attic, how they get in, why it pays to act quickly and what professional removal looks like.

Signs of rodents in the attic

  • Noises at night. Scratching, scurrying or rolling sounds above the ceiling, especially after dark when rodents are most active.
  • Droppings. Small, dark pellets on insulation, joists, stored boxes or along the top of walls.
  • Tunnels and nests in insulation. Flattened paths, shredded material or piles of nesting debris.
  • Chewed wires or wood. Rodents gnaw constantly. Chewed wiring is a real fire concern and should be checked by a qualified electrician.
  • Odor. A musty or ammonia-like smell from urine soaking into insulation.
  • Grease marks. Dark smudges along rafters, pipes or entry gaps where rodents rub as they travel.
  • Pets acting strangely. Dogs and cats often stare at, follow or bark at the ceiling.

Mice or rats?

Rats leave larger droppings and make heavier sounds than mice, and they tend to travel along rafters and the top plates of walls. Mice are smaller, can squeeze through very small gaps and often nest in insulation close to a warm ceiling. Identifying which rodent you have helps a technician choose the right traps, stations and exclusion work, and it tells you how large the openings are that need sealing.

How rodents reach the attic

Rodents are good climbers. Common routes into Oklahoma attics include:

  • Tree branches touching or hanging over the roof
  • Gaps where the roof decking meets the fascia
  • Damaged soffit vents and gable vents
  • Openings around roof plumbing vents and utility lines
  • Gaps in the garage that connect to the attic space

Once inside, they follow wall cavities and pipe chases between floors, which is why attic rodents are often heard in walls too. Our guide to mice in the walls in winter covers that side of the problem.

Why you should not wait

Rodents contaminate insulation with urine and droppings, chew wiring and HVAC ducts, and multiply quickly. The longer they stay, the more cleanup it takes. Contaminated or flattened insulation loses much of its ability to keep heat in during winter and out during summer, so a rodent problem can quietly raise energy bills as well. Heavily soiled insulation usually needs to be removed and replaced rather than cleaned.

What you can do now

Trim tree limbs back from the roofline, keep firewood and clutter away from the house, and store pet food and birdseed in sealed containers. Check soffit and gable vents for damaged screens. Avoid stirring up droppings or insulation, and do not rely on poison bait alone in an attic, because rodents that die in walls or insulation cause odor problems and do not solve the entry points.

How professional attic rodent control works

  1. Inspection of the roofline, vents, attic and garage to find entry points and gauge activity
  2. Exclusion to seal those entry points with rodent-resistant materials
  3. Removal with traps and tamper-resistant stations placed along travel routes
  4. Monitoring until activity stops
  5. Cleanup and insulation repair where needed

Koalaty handles pest control as well as insulation and remediation, which includes removal of soiled or rodent-damaged insulation, sanitizing and deodorizing, and blown-in replacement insulation. Our garage and window sealing service helps close the gaps pests use as the weather turns, so the problem can be handled from start to finish by one local team.

Frequently asked questions

Is it safe to clean up droppings myself?

Rodent droppings and urine can carry disease. Wear gloves and a mask, avoid sweeping or vacuuming dry droppings, and consider professional cleanup for large areas.

Do I need new insulation?

If insulation is heavily contaminated or compressed by nesting, replacing it restores efficiency and removes odors that attract more rodents.

What if it is a squirrel or raccoon?

Larger wildlife needs a different approach. See our live animal trapping service for humane removal.

Get your attic checked

If you hear noises overhead, call Koalaty Pest Control at (405) 543-3338. We are veteran-led and locally owned, serving Edmond, Oklahoma City, Norman, Yukon and the surrounding metro.

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