You walk past the orange tree and notice a few fruits hanging there completely hollowed out, just the rind left. Or you hear scratching above the ceiling around midnight. In the West Valley, those are two of the most common ways people find out they have roof rats.
Why roof rats like West Valley yards
Roof rats (Rattus rattus) have spread across Maricopa County over the years. They're agile climbers and prefer to live up high rather than burrow. A typical West Valley yard offers them a lot:
- Citrus trees for food and dense cover
- Fan palms with untrimmed skirts of dead fronds, which make good nesting spots
- Dense shrubs and vines along block walls, which act as travel routes
- Irrigation, pools, and pet water bowls for water
- Pet food and bird seed left outside
- Attics that stay sheltered and quiet
Block walls are also highways. Roof rats run along the top of them from yard to yard, then up trees, utility lines, and onto tile roofs.
Signs you have roof rats
Roof rats are mostly active at night and are cautious, so you may never see one. Look for what they leave behind.
In the yard
- Hollowed-out citrus still hanging on the tree, often with a small hole and the pulp scooped out
- Droppings on top of block walls, under trees, or along patio edges, usually dark and spindle-shaped with pointed ends
- Chewed fruit or nuts collected in sheltered spots
- Rub marks, greasy dark smudges along walls, beams, or pipes they travel regularly
Around and inside the house
- Scratching or running sounds in the attic or walls after dark
- Droppings in the attic, garage, or behind appliances
- Gnawed wires, insulation, or stored boxes
- Displaced insulation or nesting material in the attic
- Pets acting interested in a wall, ceiling, or cabinet
Read more about roof rats in our pest library.
How they get into your home
Roof rats can squeeze through surprisingly small openings, about the size of a quarter. On West Valley homes, the common entry points are:
- Gaps under tile roofs, especially at the eaves and where the roof meets a wall
- Roof and gable vents with damaged or missing screens
- Plumbing, AC line, and cable penetrations through stucco
- Gaps around garage doors, especially the corners
- Openings under solar panels, where they can shelter and reach the roofline
- Tree branches and palm fronds that touch or hang over the roof
Exclusion: the part that actually solves it
Trapping removes the rats that are there. Exclusion keeps more from moving in. Without both, the problem tends to come back. Here's what exclusion looks like on a typical home.
Seal the structure
Every opening a rat can fit through needs to be closed with materials they can't chew easily, like hardware cloth, metal flashing, or sealant backed with metal mesh. Vent screens get repaired or replaced, and roof gaps are closed at the eaves.
Cut off the highways
- Trim tree branches back several feet from the roof
- Keep palm skirts trimmed so dead fronds don't pile up
- Thin out vines and dense shrubs growing on block walls
Remove food and water
- Pick ripe citrus promptly and pick up fallen fruit
- Bring pet food and water in at night
- Store bird seed in sealed metal containers
- Fix dripping hose bibs and irrigation leaks
Watch for activity
After sealing, it's important to confirm nothing is still inside. Trapping and monitoring continue until activity stops, so a rat isn't sealed into the attic.
How we handle roof rats
Our rodent control service starts with a full inspection: roofline, attic, garage, yard, and the trees and walls rats use to get around. Bryce finds the entry points, sets up trapping where it makes sense, and walks you through the exclusion work and yard changes that will keep them out. He uses kid and pet friendly methods, which matters in yards where dogs and kids are around.
We'll also be straight with you about what's in the yard. Roof rats in a neighbor's citrus can keep visiting your trees, and that's a yard management issue more than a house problem. Our job is to make sure they can't get inside.
When to call
If you're hearing noises at night or finding hollowed-out fruit, it's a good time to get it looked at. Quotes are free, and you can text a photo of droppings, damaged fruit, or a gap you're worried about to (623) 363-3124 for the fastest answer. Bryce is the owner, and he does the inspection and the work himself. You can also reach us on our contact page.