How Do Roof Rats Get in the Attic? Follow Their Route From Your Yard

How do roof rats get in the attic? They climb. In South Florida, they usually go from a palm, a fruit tree, an overhanging branch or a utility line onto the roof, then squeeze in through a gap at the soffit, a roof vent, the edge of the roofline or the spot where the AC line goes through the wall. If you walk that route around your own house with a flashlight, you can usually find how they're getting in.

Walk your yard and roofline, stop by stop

Pick an evening, start at the back of the yard and work your way to the house.

Start with the food. Look under fruit trees for fruit on the ground, half-eaten fruit still on the branches, and seed under the bird feeder. Check whether pet food stays out on the lanai after dinner. Roof rats will travel to an easy meal and then look for a place nearby to live.

Find the climbing paths. Stand back from the house and look up. Do palm fronds rest on the roof or hang over it? Do branches from an oak, ficus or mango touch the gutter or come within a few feet of it? Is there a power or cable line running from a pole to the house? Roof rats walk those lines like a tightrope. Vines growing up a wall and a tall hedge right against the house are ladders too.

Look at the roofline. On a barrel tile roof, look at the first row of tile at the eave. The open ends of the tile are a common way in when the closures that should fill them are missing or broken. Check soffit vents for torn or pushed-out screens, look at the corners where two rooflines meet, and look for gaps between the fascia board and the roof.

Check the vents and pipes. Gable vents, roof vents and the screens over them. Plumbing vent pipes coming through the roof.

Follow the utilities. Where the AC line set, electrical and cable go into the house, there's often a gap around them that never got sealed, or the sealant has cracked. Same for the dryer vent.

Look for signs along the way. Dark grease marks along a fascia board or beam, droppings on top of the AC unit or on the lanai roof, chewed fruit and small holes in the screen of a screened pool enclosure.

A roof rat can squeeze through a gap about the size of a quarter, and sometimes smaller, so small openings count.

What you can do this weekend

• Get branches and fronds cut back from the roof. This is a job for a tree service, not us; we don't trim trees. Ask for a clear gap between the canopy and the roof, and have dead fronds removed. Stay away from power lines yourself. Call your utility or a licensed tree service for anything near them.
• Pick up fallen fruit every day or two while trees are fruiting.
• Bring pet food in at night and store it in a sealed container.
• Move bird feeders away from the house, or take them down for a while.
• Put lids on trash cans and keep them closed.
• Clear woodpiles and storm debris away from the walls. After a storm, downed branches and debris give rats cover; our page on rodents after a hurricane has more.

Roof rats in the attic in Florida: how we handle it

We inspect for entry points, set traps and tamper-resistant bait stations, and seal the gaps rodents are using with exclusion work, to help keep them from getting back in. Our rodent exclusion guide shows the gaps we seal. We seal the entry points ourselves, so you're not left with a list of gaps and a trip to the hardware store. Inside the home, including the attic, we use snap traps only, never loose bait. Tamper-resistant bait stations go outside. Keep kids and pets off treated areas until dry, and follow your technician's instructions.

Learn more on our rodent control page, and see our roof rat library page for the signs to look for.

After the rats are out, regular service keeps watch. Our general pest plan is $125 per quarter, about $42 a month, and monthly or custom schedules are quoted after the inspection. For plan customers: "If pests come back between visits, so do we, at no extra cost." There are no long-term contracts and no cancellation fees, just a simple service agreement. We're family-run and licensed, with 30+ years in the business, and hablamos español. See plans and pricing or browse more guides.