Air Duct Repair in Cape Coral, FL

Air duct repair in Cape Coral homes

One room stays warm all afternoon. The register barely moves air. The others blow fine. That pattern usually means a branch problem, not an AC problem. The common cause here is flex duct on a long attic run. A torn outer jacket or kinked elbow can do it. So can a branch pulled loose at the boot, dumping cold air into the attic.

Repair starts at the plenum takeoff and follows the run. Flex should be stretched tight and supported with wide straps, not wire. Sagging between joists adds resistance every few feet. We cut back damaged liner to sound material, reattach to the collar, band the inner core, then reseal the insulation sleeve and vapor jacket. Tape alone fails in attic heat. Mastic holds.

Moisture is the other half. Humid attic air meets cold metal at ceiling and floor boots. That brings rust and sweating drywall rings. Mold shows up on fiberglass liner or ductboard edges too. Contaminated ductboard gets replaced, not cleaned.

Older 1960s–70s stock may still run original metal trunks through interior soffit chases with high sidewall returns. Manufactured homes use under-floor belly duct, where rodents and crushed sections are typical. If a house has one undersized central return, sealing branches alone won't fix the airflow.