Roof Dryer Vent Cleaning in La Jolla, CA

Why does a roof-vented dryer clog faster than a wall vent?

Gravity is the short answer. A roof jack sits at the top of a vertical rise. Lint that gets pushed up falls back when the dryer stops. It settles at the elbow where the duct turns to climb. La Jolla's second-floor laundry rooms in 1990s–2000s two-story homes almost all vent this way. Long run, several elbows, then straight up through the attic.

Coastal air makes it worse. Damp lint mats instead of blowing free. It packs against the roof-jack screen and the flapper cap. Salt corrosion stiffens the flapper hinge so it stops opening fully. The dryer runs two and three cycles on one load. That is the symptom most people call about.

Cleaning a roof termination means work from both ends. Brushing from the laundry side alone pushes debris into the vertical section. The cap comes off, the screen gets cleared, and the run is brushed downward with rods. Spring adds bird and wasp nesting in roof and eave terminations, which is a removal job, not a brushing job.

Plan on every 6-12 months for roof-terminated runs and daily-load households. Ground-floor garage-wall runs can usually go a year.