Roof Dryer Vent Cleaning in Danville, CA

Why does the roof vent clog faster than a wall vent?

Because the lint has to climb. A roof termination sits at the top of a long second-floor run, the kind built into 1980s and newer two-story tracts here. Warm moist air rises, cools near the roof deck, and drops its load. During winter rain weeks that damp lint packs into a dense plug at the jack. A wall hood never does this. It dumps at the same level the dryer sits.

Roof jacks also invite tenants. Uncapped or screen-less jacks draw birds and roof rats, common on lots backing oak woodland. Nesting material plus lint is a solid blockage. Oak and grass pollen, then summer hillside dust, stick to whatever lint is already at the termination.

Cleaning is done from both ends. Rotary brush up from the laundry connection, then the jack opened and cleared from above. One-direction work pushes debris back down. Booster fans in long runs get checked too, since they quit quietly and nobody notices until cycles double.

Plan on yearly service for any upstairs laundry with an attic or roof run. If foil flex still crosses a ceiling cavity, swap it for rigid metal.