Rodent Exclusion and Sealing in Fort Lauderdale

A Fort Lauderdale Mediterranean Revival home with a red barrel tile roof, white walls and a brick courtyard — Tile roofs like this one need the open tile ends at the eave closed off, or rats walk right in.

Exclusion is the part of rodent work that stops the next batch. Traps catch the rats already inside. Sealing closes the doors they used. In Broward, where roof rats live in the trees all around your house, skipping this step usually means trapping again in a few months.

UF/IFAS gives the gap sizes to beat: rats squeeze through cracks half an inch wide and mice through a quarter inch. It also lists the materials that hold up: sheet metal of 26 gauge or heavier, hardware cloth of 19 gauge or heavier with openings no more than a quarter inch, cement mortar and concrete. A good exclusion job uses those, not foam on its own.

What people usually notice first:

Rats back in the attic a few months after trapping
Daylight visible at the roof edge from inside the attic
Open tile ends, torn soffit screen or a loose gable vent
Gnaw marks or grease stains around a pipe or vent opening

The spots that get sealed on a typical Broward house

Every house is a little different, but the same list comes up again and again. The technician walks the outside, then the attic, and marks each opening. On a tile roof, the open ends of barrel tile at the eave get filled or capped. Soffit and gable vents get new metal screen. Pipe and AC line penetrations get packed and sealed. The garage door gets a new bottom seal, and side seals if daylight shows at the corners.

Barrel tile eave closures and gaps at the ridge
Soffit vents, gable vents and roof vents
Plumbing vent pipes and gaps around them
AC refrigerant line holes and dryer vents
Garage door bottom and corner seals

What a thorough exclusion job includes

Ask for the job in writing. A clear quote names every opening and the material for each one, and says how the provider will make sure no rat gets sealed inside.

A full roofline and attic inspection before any sealing
A written list of openings, with photos where possible
Chew-proof materials: hardware cloth, sheet metal, mortar, tile closures
Trapping inside while the sealing happens
A check after sealing, since rats left outside test every seam

Noises in the ceiling after dark? Describe what you're hearing.

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Step by step

This is the usual order on a Fort Lauderdale house:

Inspect the roofline, attic, walls and garage, and mark each opening
Set traps inside along the active runways
Seal everything except one or two main openings, or seal while trapping, depending on the provider's method
Trap until activity stops, then close the last openings
Trim limbs and fronds back from the roof so rats can't test the new seals
Recheck the house over the next couple of weeks

Why sealing is harder in Fort Lauderdale

UF/IFAS says roof rats are such good climbers and swimmers that it's hard to exclude them completely. Fort Lauderdale gives them every advantage: trees touching roofs, utility lines on every block, and roofs that take a beating each hurricane season. A seal that held in May can fail after one storm cracks a tile.

Salt air is a factor near the beach and the Intracoastal. Cheap screen rusts through, so ask about the metal being used. And many homes have had additions, so there's often a seam where a newer roof meets an older one. Those seams are worth a close look.

Trees and wires matter too

Sealing a roof that still has a mango limb lying on it is only half done. Roof rats will chew at a fresh seal if the tree keeps delivering them to it. Most technicians will tell you which limbs and fronds to cut back. That part is usually your job or your tree trimmer's. Utility lines can't be moved, which is one more reason the roofline itself has to be tight. The exclusion guide explains the usual sequence in more depth.

Common questions

Can't I just fill the holes with spray foam?

Rats chew through foam. It can fill space behind metal or mesh, but on its own it won't keep them out.

How long does sealing take?

It depends on the size of the house and how many openings there are. The provider can tell you after the inspection.

Is steel wool good enough?

It rusts in Florida humidity and can be pulled out. Many providers use it only packed under mortar or sealant. Steel wool vs copper mesh compares the options.

Will sealing trap a rat inside?

It can if the last openings close before trapping is done. Ask how the provider prevents that and what happens if it occurs.

Does exclusion come with a warranty?

Some providers offer one. It comes from them, not this site, so ask what it covers, how long it lasts and what voids it, like letting trees grow back onto the roof.

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