Air Duct Repair in La Mesa, CA

Air duct repair in La Mesa homes

One room never cools. The vent barely breathes. You hear air moving but feel nothing. That usually means a duct problem, not an AC problem. In attics, flex duct sags between supports and kinks hard at the register boot. A kinked boot can choke a run almost completely. Torn inner liner is worse, because conditioned air dumps into the attic while the outer jacket still looks fine from below.

Older La Mesa houses run original galvanized sheet metal. Prewar and 1950s-60s homes often have separated joints and rusted takeoffs. Old fiberglass duct liner sheds into the airstream too. Under-insulated metal in a vented attic sweats where humid coastal air meets cold supply runs. Wet insulation and stained drywall follow, often with mold.

Return side problems hide in plain sight. Postwar ranches commonly have one undersized return. Filters bypass, loaded dust goes straight into the blower and supply trunk. Crawlspace returns in raised-foundation homes pull soil dust and musty air indoors.

Repair means sealing joints with mastic and resupporting sagging runs. Damaged sections get replaced, boots get fixed. Rodent-chewed duct gets replaced, not patched. Ash and fine particulate from Santa Ana events settle in trunks and need removal before sealing. We say so when a full replacement beats repairing a tired system.