Last updated: 2026-04-23
Roof rats in the attic in Kensington, San Diego
Scratching and scurrying overhead at night in San Diego is almost always roof rats. They travel along fence lines, tree limbs, and utility wires, then slip into the attic through gaps at the roofline and vents. Trapping clears the ones inside, but the problem only ends once the entry points are sealed, especially on canyon-adjacent blocks with constant pressure from open space.
Old wood-frame stock: drywood termites, roaches, ants.This is the oldest housing stock in the city, most of it wood-frame built before 1940, and it carries the heaviest drywood termite pressure in San Diego. Old sewer laterals and dense construction give German roaches and rodents easy harborage, and Argentine ant trails run strongest here off mature street trees and decades-old landscaping.
The homes around Marlborough Drive, Adams Avenue, and the Kensington Park blocks carry original wood behind thick stucco, so drywood termite inspection and roof-rat exclusion around tile roofs lead the work. Mature gardens keep Argentine ant trails running through spring and summer, and the canyon-adjacent streets see the most rodent activity.
What causes roof rats in the attic
What to check before you call
- Listen for the time of night the activity peaks; roof rats are most active just after dark
- Look for droppings, gnaw marks, and rub marks along attic beams and the roofline
- Cut tree limbs and ivy back off the roof to remove the access route
- Scan the eaves, vents, and roofline for gaps the size of a quarter or larger
When to stop and call a pro
If you are hearing activity for more than a couple of nights, or finding droppings in the attic or garage, the population is established and multiplying. Roof rats breed fast, so trapping plus sealing the entry points is the move, not waiting to see if it clears on its own.
What it costs to clear roof rats
Initial trapping setup runs $250 to $450 over a 1 to 3 week period, and exclusion to seal the roofline and vent entry points runs $400 to $2,000 depending on the home. Attic cleanup after a heavy infestation is quoted on-site.
Roof rats in the attic questions in Kensington
Why you hear roof rats in the attic in Kensington?
Scratching and scurrying overhead at night in San Diego is almost always roof rats. They travel along fence lines, tree limbs, and utility wires, then slip into the attic through gaps at the roofline and vents. In Kensington, the pre-war wood framing behind the stucco draws drywood termites, tile roofs and mature landscaping give roof rats and argentine ants harborage, and the canyon edges toward ward canyon push rodents into the back blocks., which shapes how this shows up.
Will trapping alone fix it?
Trapping clears the rats currently inside, but new ones follow the same route in unless the roofline and vent gaps are sealed. On canyon-adjacent homes especially, exclusion is what actually ends the problem.
How are they getting into the attic?
Roof rats climb fences, branches, ivy, and utility wires to the roof, then enter through gaps at the eaves, vents, and roofline as small as a quarter. Trimming the access routes and sealing the gaps closes the door.
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