Duct Sealing in Los Gatos, CA

Duct sealing in Los Gatos homes

One room never gets cold. The system runs long. Your attic feels conditioned and your bedroom does not. That is leakage, and in Los Gatos it usually traces to a handful of repeat offenders. Disconnected boots at register takeoffs are the big one. The flex slips off the collar and dumps supply air straight into the attic or crawlspace. Nobody sees it because it is above drywall.

Original galvanized trunk-and-branch in postwar ranch homes leaks at the seams and at old tape joints. The cloth-backed tape dried out decades ago. Mid-century wrapped fiberglass ductboard leaks at corners and can shed fiber once the liner deteriorates. R-6 and R-8 flex from the 1980s onward leaks less at the wall, more at the connections. It sags or kinks badly in attics, killing static pressure before sealing even matters.

Real sealing means mastic on accessible joints and mechanical fasteners at collars. Sagging runs get re-supported. Tape alone over dusty metal fails. Crushed crawlspace runs get replaced, not sealed.

Check it yourself first. Pull a register cover and look at the boot-to-flex connection. Rodent nesting and chewed outer jacket are common on wooded and hillside parcels here.