---
title: "Roof Rats in the Phoenix Valley | Platinum Pest Management"
description: "Roof rats in the Phoenix Valley nest in citrus and palm trees and get into attics. Learn the signs, what to avoid and why sealing entry points keeps them out."
url: https://platinumpestaz.com/blog/roof-rats-phoenix-valley/
updated: 2026-09-23
publisher: Platinum Pest Management LLC
---

# How to Spot and Keep Out Roof Rats in the Phoenix Valley

Roof rats in the Phoenix Valley live in citrus trees, palm fronds and attics, and they reach roofs by running along block walls and utility lines. Trapping removes the rats already inside, but sealing the openings they use keeps new ones out over the long term.

## At a glance

- Roof rats appeared in older Phoenix neighborhoods with large citrus trees in the early 2000s and are now found across much of the Valley.
- Hollowed-out citrus still hanging on the tree, chewed drip irrigation lines and scratching in the attic at night are common signs of roof rats in Phoenix-area homes.
- Roof rats use the tops of block walls, utility lines and tree branches as travel routes, and an adult fits through a gap about half an inch wide.
- Poison bait placed around a house can leave rats dying inside walls and attics, which is why Platinum Pest Management relies on trapping and sealing entry points for roof rats.
- Picking up fallen fruit, harvesting ripe citrus promptly and removing dead palm fronds give roof rats less food and shelter around a home.

## How roof rats in the Phoenix Valley spread from older neighborhoods

Roof rats in the Phoenix Valley were first reported in the early 2000s, in older central Phoenix neighborhoods known for large citrus trees. They are now found in many parts of the metro area, including older parts of [Tempe](https://platinumpestaz.com/service-areas/tempe/), [Scottsdale](https://platinumpestaz.com/service-areas/scottsdale/) and [Mesa](https://platinumpestaz.com/service-areas/mesa/). The spread has followed mature landscaping, since neighborhoods with tall palms, established citrus and thick oleander hedges give roof rats food and cover. Those areas tend to have more rats than new subdivisions with young trees.

The roof rat is a slender rat with large ears, a pointed nose and a scaly tail longer than its head and body combined. It is a strong climber that nests above the ground, and it is most active from dusk through the night. A female can have several litters a year, so a few rats in an attic can turn into many within one season. Pack rats, the native desert rodents that build stick nests near washes and open desert, are a different animal with a furry tail, and our [rodent control](https://platinumpestaz.com/services/rodents/) page covers both.

![Roof rat with large ears and a long scaly tail on a white background](https://platinumpestaz.com/assets/img/rat.jpg)

*Roof rats are also called black rats, though many are gray or brown.*

## Signs of roof rats in attics and yards

Most people notice roof rats by sound first, as scratching and running in the attic or walls shortly after dark. Other signs around the house include:

- Droppings about 1/2 inch long with pointed ends, in the attic, garage or along walls
- Insulation that has been flattened into paths or pulled apart for nesting
- Gnaw marks on wood, wiring, stored boxes or air conditioning line insulation
- Dark, greasy rub marks along beams, pipes and the edges of openings
- Oranges or grapefruit eaten out from the inside, with the empty peel left on the branch
- Drip irrigation lines chewed open for water
- Rats running along block walls or utility lines at dusk

Pets can give an early warning as well. A dog or cat that stares at one spot on a wall or ceiling, or keeps returning to the same tree, may be tracking rats.

## Why citrus and palm trees attract roof rats

Citrus gives roof rats a steady food supply for much of the year. They climb into the tree at night, chew a hole in an orange or grapefruit and eat the inside, which leaves the hollow peel hanging on the branch. Fruit left on the ground feeds them as well, along with pet food, bird seed and dates from palm trees.

Palm trees supply shelter, since the skirt of dead fronds that builds up under the crown of an untrimmed palm makes a dry, protected nest well off the ground. Dense oleander hedges, bougainvillea and ivy on block walls serve the same purpose closer to the house, and branches that touch the roof connect all of it to the attic.

## How roof rats travel along walls, lines and trees

Roof rats prefer to travel above the ground. The tops of block walls, power and cable lines, fences and overlapping tree branches work as routes between yards, which is how one infested yard can supply the houses around it. Once on the roof, a rat looks for any opening into the attic.

The gaps we find most often are at the lower edge of tile roofs, where the bird stop that closes the space under the first row of tiles is missing or damaged. Torn screens on roof and gable vents are another common entry, along with gaps where pipes, wires and air conditioning lines enter the house. A gap about 1/2 inch wide is enough for an adult roof rat.

## Why sealing entry points is the long-term fix for roof rats

Trapping removes the rats that are already inside, but new ones keep arriving as long as the openings stay open, because roof rats live in trees and yards throughout the neighborhood. Sealing those openings with materials rats cannot chew through, such as sheet metal, mortar and hardware cloth, keeps the attic clear after the trapping is done. Expanding foam used alone does not hold up, since rats chew through it.

Sealing is done alongside the trapping so rats are not shut inside the attic, where they would chew a new way out or die somewhere hard to reach. Roof rats are also wary of new objects, so traps sometimes sit for several days before rats approach them. Homeowners can take on the yard side of the work, such as trimming palms and cutting branches back several feet from the roof. Sealing along the roofline usually calls for a ladder and rodent-resistant materials.

## What not to do about roof rats

A few common reactions make roof rat problems worse or harder to finish:

- Scattering poison bait around the house or in the attic. Rats that eat it often die inside walls or in the attic, and the odor can last for weeks. Bait also puts pets at risk, along with the owls and hawks that eat poisoned rats.
- Leaving fruit on the ground or overripe fruit on the tree.
- Feeding pets outdoors overnight or letting bird seed pile up under a feeder.
- Sealing every opening before the rats inside have been removed.
- Sweeping or vacuuming dry droppings, which puts dust into the air. Spray them with disinfectant first and wear gloves.

## How Platinum Pest Management handles roof rats

Our roof rat inspection starts outside, at the tile eaves, the vents and the places where pipes and wires enter, then moves to the attic, the garage and the yard. We then place traps along the routes the rats are using, most often in the attic and garage. Entry points get sealed with rodent-resistant materials, and we come back to check traps and look for fresh signs. The work is finished once the traps keep coming up empty and no fresh droppings or gnawing appear.

We handle roof rat work across the East Valley and in [Phoenix](https://platinumpestaz.com/service-areas/phoenix/). A [free inspection](https://platinumpestaz.com/free-inspection/) and a free written quote are the first step.

## Frequently asked questions

### Do roof rats eat citrus?

Yes. Roof rats climb citrus trees at night and eat the fruit, often hollowing out an orange or grapefruit and leaving the empty peel hanging on the branch. Picking fruit as it ripens, collecting fallen fruit every day or two, and stripping the tree at the end of the season all give them less to eat.

### Should I use rat poison in the attic?

We advise against it. Rats that eat poison bait often die inside walls or in the attic, where they are hard to reach, and the odor can last for weeks. Bait can also harm pets and the owls and hawks that eat poisoned rats. Trapping combined with sealing entry points avoids those problems.

### Can roof rats get in through a tile roof?

Yes. Many Valley homes have a strip called bird stop that closes the gap under the first row of tiles at the eaves. Where it is missing or damaged, roof rats can crawl under the tiles and into the attic. Torn vent screens and gaps around pipes and wires are other common entry points.

### Why are roof rats more common in older neighborhoods?

Older neighborhoods tend to have mature citrus trees, tall palms and dense hedges, which give roof rats food and nesting cover. Newer subdivisions with young trees offer less of both, although roof rats can move into any neighborhood once the landscaping fills in. Our [rodent control](https://platinumpestaz.com/services/rodents/) page explains how we check a property.

### How do I clean up rat droppings?

Put on rubber or plastic gloves and spray the droppings with a disinfectant or a bleach solution, then let it soak for about five minutes before wiping up. Avoid sweeping or vacuuming dry droppings, which can put dust in the air. Seal the waste in a plastic bag and wash your hands when you finish.

## Contact Platinum Pest Management

- Phone or text: (480) 518-1942
- Office: 3944 E Ellis St, Mesa, AZ 85205
- Hours: Monday to Friday 7 a.m. to 5 p.m., Saturday 7 a.m. to noon, closed Sunday
- Arizona pest control business license #9562
- Free inspection: https://platinumpestaz.com/free-inspection/