Air Duct Repair in San Jose, CA

Air duct repair in San Jose homes

One room never gets air. The rest of the house is fine. That pattern usually means a branch run came apart, not a failing furnace. In attics, flex duct pulls off the boot collar when someone kneels on it. Solar installers, insulation crews, and recessed-light retrofits cross the same attic. The inner liner slips, the tape lets go, and conditioned air dumps into blown-in insulation.

Sagging is the quieter version. Flex strung between trusses droops into a U. Dust ponds in the low spot. Airflow drops at the far register and the face stains gray. Repair means re-supporting the run, not just cleaning it.

Older stock brings different failures. Galvanized trunk-and-branch from the postwar decades leaks at every unsealed joint. Fiberglass ductboard plenums get soft and shed as the binder ages. Cleaning a crumbling plenum is pointless. It needs replacing. Slab and underfloor perimeter ducts in flat 1950s tracts can take water in winter. That's a separate problem.

Rodents matter here. Homes near the foothills and open fields get nesting in crawlspace and attic runs. Chewed liner has to be cut out and replaced. Sealing a damaged section just traps the odor inside it.