Duct Sealing in Camarillo, CA

Duct sealing in Camarillo homes

One room never cools. The hallway register barely moves air. Dust films the furniture days after cleaning. Those symptoms usually trace to leakage, not to the equipment. Supply air is escaping into the attic before it reaches you. Return side leaks pull attic air back in, which is why fiberglass and blown cellulose show up on register faces.

The failure points are predictable here. In post-1980 houses with R-4.2 or R-6 flex, boots separate from the ceiling drywall and the inner liner slips off the collar. Mastic was often skipped at the original build. In pre-1975 homes with rigid galvanized trunk and round takeoffs, the leaks are at seams and at the plenum, and old cloth tape has gone brittle. Hillside and river-valley houses with floor ducts leak into the crawlspace, where rodent entry follows.

Real sealing means mastic and mesh at joints, plus mechanical fastening at collars. Sagging runs get reset so they are supported, not strapped tight. Foil tape alone on dusty metal does not hold.

Check it yourself first. Hold tissue at a return seam. Look for gray streaks around register edges. Undersized single central returns in 1960s–70s tract homes make every leak worse.