Rats in the attic in Waco: signs and what to do

Published November 4, 2026

Rats in a Waco attic are almost always roof rats, which climb trees, fences and power lines to reach the roof and slip in through soffit gaps and vents. The fix is trapping in the attic, sealing the roofline and cutting back limbs, followed by cleanup if the insulation is soiled.

The signs

Rats in the attic announce themselves at night. The house goes quiet and you hear scurrying, scratching or gnawing overhead, sometimes something being rolled or dragged. It’s usually loudest a couple of hours after dark and again before dawn.

Other signs:

• Droppings on top of the insulation, about half an inch long
• Runways pressed into the insulation, often along the eaves
• Greasy rub marks on rafters and the top plates of walls
• Chewed wiring or ductwork
• Nests of shredded insulation near the eaves or around the attic hatch
• A pet staring at the ceiling or a wall

Why it’s almost always roof rats

Texas Tech’s Mammals of Texas says roof rats are common over most of Texas, especially in towns, and usually frequent attics, rafters and crossbeams. They travel along pipes, beams and wires. Norway rats can climb but usually live low, in burrows.

So if the noise is overhead, plan for roof rats. The roof rats vs Norway rats article explains the differences.

How they get up there

Roof rats need a path and a gap.

The path is usually a tree. Waco’s older neighborhoods have mature oaks, pecans and magnolias, and a limb within a few feet of the roof is a bridge. Fences, power and cable lines and vines on the wall also work.

The gap is somewhere on the roofline:

• Soffit returns, where the roof edge turns a corner
• Gable vents with torn or missing screen
• The joint where a lower roof meets a two-story wall
• Gaps between the fascia and the roof deck
• Roof vents and old attic fan openings

The CDC’s list of places to check outside the home starts with roof framing, gable ends, overhangs and soffits.

What to do tonight

Don’t panic and don’t go up into the attic at night with a broom. A few practical steps:

1. Note when and where you hear them. Over which room? What time?
2. Keep pets out of the attic access area.
3. Don’t throw bait into the attic. A rat that dies up there in Waco’s heat smells fast.
4. Close any open attic hatch so rats can’t come down into the house.
5. Call in the morning.

What a technician does

A good attic job has four parts.

Inspection. The technician checks the attic for droppings, runways and nests, then walks the roofline outside, often from a ladder, to find every gap.

Trapping. Rat-sized snap traps go on the runways in the attic, along rafters and near the eaves where droppings cluster. Return visits clear catches and move traps.

Sealing. Gaps get closed with sheet metal flashing and hardware cloth. Some providers leave one opening with a trap on it until activity stops, then close it.

Trimming. Limbs within reach of the roof should come back. Roof rats are good jumpers, so a few feet of clearance helps.

Heat changes the job

The National Weather Service’s Fort Worth office lists the average first and last 100-degree days at Waco as July 4 and August 30. On those afternoons an attic gets dangerously hot. Rats move to cooler spots in the walls or outside during the day and come back at night. Technicians schedule attic work early in the morning in summer, and trap placement may shift with the season.

Heat also speeds up decay. A rat that dies in a summer attic produces a strong smell within days. That’s one more reason to trap instead of bait.

Cleanup

Rats that lived in the attic for weeks leave droppings, urine and nests in the insulation. Once the rats are out and the gaps are sealed, clean it up. The CDC says not to sweep or vacuum rodent droppings or nests and to spray them with disinfectant first. Small areas you can handle yourself. Heavily soiled insulation may need to come out. Attic cleanup explains the process.

Keep them out

After the job, check the insulation with a flashlight every few months. New droppings on clean insulation are easy to see and mean a gap has opened. Keep limbs trimmed, and have the roofline checked after any roof work, since roofers sometimes leave gaps. The exclusion page covers sealing step by step.