The People Behind the Work

Some vents can't be cleaned back to working. If the flex duct behind your dryer is crushed flat, or the original foil is torn open inside a wall cavity, brushing it just moves lint around inside a duct that was already failing. We say so on the spot. Same with a run that was never going to work: a 30-foot attic path with five elbows and a sagging section holding a pool of packed lint, or an old vinyl line that comes apart when you touch it. In those cases you're looking at repair or a new run, and we'd rather tell you that than take payment for an hour of work that changes nothing. We also tell people the other way around. If you call us at eight months and the duct is light, we show you what came out and tell you to wait.

Across the Santa Clara Valley/South Bay there are two vent realities, created by era. Postwar slab ranches put laundry in the attached garage or a hall alcove on an exterior wall, with a 4" duct out through stucco at 3 to 10 feet (short run, easy exit), but often the original flexible foil or vinyl still clamped at both ends and mashed behind the dryer. Post-1990 two-story tracts and townhomes moved laundry upstairs or into an interior hall closet, and the duct turns up through a framed chase or into the attic for 15 to 35 feet with three to five elbows before it reaches a roof jack or gable vent. Those are the configurations that actually clog. Dry-season dust and heavy spring grass, oak and olive pollen off the valley floor and foothills load the exterior hood and get pulled into the duct through the dryer's intake. Winter is the only condensation window we see: cold attic and roof-run ducts on 35 to 45°F mornings let moist exhaust wet the lint into a crust that won't vacuum out. There's near-zero freeze damage here, so the failure mode is slow accumulation plus crushed flex, not ice.

On site we bring a rotary brush on a flexible vent line, a vacuum that seals to the duct, and an anemometer. We read airflow at the hood before we start and again when we're done, so the difference is a number and not a feeling. We work the brush from the direction that makes sense for your run, pull the dryer out to check the transition behind it, clear the hood flapper, and go on the roof when the vent terminates there. We work behind gas and electric dryers, stacked units in closets, and the compact machines in condos. Four-person households and condos with shared laundry walls usually need clearing every 12 months. Upstairs and roof-vented homes land close to annual no matter how many loads you run. What moves the cost on a cleaning here is mostly access and length: a garage wall vent at eye level is quick, while a 30-foot attic run to a roof jack means roof time, a second tech on some houses, and a longer brush path through multiple elbows. Crusted winter lint takes more passes than dry-season dust. If you're not sure where you stand, an inspection answers it before anyone starts brushing.