Roof Rats in Jacksonville, FL

In Jacksonville, the roof rat is the lead rodent. It is Florida's dominant rat, also called the fruit rat or citrus rat, and it is a climber that lives up high. Where Norway rats work low along slabs and canals, roof rats head for the roofline and the attic. If the noise is overhead and comes at night, and your yard has oaks or palms near the house, read on.

Why Jacksonville is roof-rat country

The First Coast gives roof rats everything they want. The warm, humid subtropical weather has no real winter, so the rats breed and stay active year round. The city's heavy oak canopy and its palms grow right up against houses, and their limbs and fronds touch or overhang the roof. Fruit trees and citrus in the yard feed a colony. Add slab-on-grade CBS and stucco homes with tile or shingle roofs, deep soffits, and screened lanais, and roof rats have both food and shelter within a short climb. For a neutral overview of rats and how to manage them, the EPA's guidance on managing rodents in your home is a useful reference.

How they get in

Roof rats reach a Jacksonville attic from above:

• Palm fronds and oak limbs. Rats climb the trunk and run out along limbs and fronds that touch or overhang the roof.
• Wires and fences. Overhead power and cable lines and the top rail of a fence give them a bridge straight to the roofline.
• Soffit and eave gaps. Once on the roof, they push in through gaps where the soffit meets the wall and where the eave has pulled loose.
• Roof and gable vents. Unscreened or torn roof-vent and gable-vent openings let them walk right into the attic.

Once inside, a roof rat only needs a gap about the size of a quarter to keep coming and going.

Signs of roof rats

Because they live high, the signs are high too. Listen for scratching, gnawing, or scurrying overhead in the ceiling or attic at night. Look for capsule-shaped droppings larger than mouse droppings scattered across the attic insulation, greasy rub marks along the roofline and rafters, gnawed wood and wiring at the eave and in the attic, and gnaw marks or holes at the soffit. Fruit stripped from a tree or half-eaten citrus on the ground is another clear sign near the house.

How to get them out and keep them out

Roof rat control works from the roofline down, and it takes three things together:

• Remove the population. Trapping in the attic and along the roofline runways the rats use, with follow-up until the activity stops.
• Seal the ways in. Exclusion closes the soffit and eave gaps, screens the roof and gable vents, and seals where the roofline meets the wall with rodent-proof, metal-backed materials so they cannot get back in.
• Cut the highways and clean up. Trim palms and tree limbs back from the roof so the rats lose their bridge, then use cleanup to remove the droppings, fouled insulation, and scent trails that would draw the next colony in.

Start with a rodent inspection so the roofline gaps, climb routes, and attic activity get mapped before any work begins. For the broader picture, the Jacksonville rat control page covers both roof rats and the low-living Norway rat. The heavier lifting of attic trapping and roofline sealing is best left to a local rodent exterminator who works these rooflines often.

Roof rat questions