Dryer Vent Rerouting in San Diego, CA

Rerouting a dryer vent in San Diego homes

On 1950s ranch tracts here, the original duct often runs under the slab. Those cannot be cleaned properly and cannot be relined. Rerouting is the only honest fix. We abandon the buried run and build a new path through the wall or ceiling, in rigid galvanized pipe.

The real constraint is developed length. Code caps how far a dryer can push, and every elbow eats a chunk of that budget. A short sidewall run with two bends outperforms a long roof run with five. The shortest legal path wins, not the easiest one to drill. In two-story tract homes, that means reading joist direction before anything gets cut.

Common reroutes: upstairs laundry off a lint-packed roof jack to a gable or sidewall hood; garage alcove runs where crushed foil flex gets replaced with hard pipe and a recessed box behind the dryer. Terminations get a damper, never a screen. Birds got into the old one because of that screen.

What adds time: stucco patch and color match, attic access, firewall penetrations in attached garages, and condo chases that need HOA sign-off. If a cleaning restores airflow, we say so and skip the reroute.