Air Duct Repair in Houston, TX

Air duct repair in Houston homes

One room never cools. The vent breathes, but barely. You hear a whistle at the return grille. Upstairs runs warm while downstairs freezes. Those are duct faults, not a weak compressor. In Houston attics the usual cause is flex duct that sagged off its straps. Air stalls in the low loops. Dust settles there and stays.

Most homes built from the 1980s on use insulated flex tied to sheet-metal or ductboard plenums. The failures repeat. Torn outer jacket. Compressed insulation that sweats in a humid attic. A branch run pulled loose at the collar, dumping cold air above your ceiling. We re-support, re-collar, mastic the joint, then reseal the vapor jacket. Tape alone does not hold here.

Older 1950s-70s houses have round galvanized or rigid fiberglass board trunks. Those rust or crumble at the plenum. Pier-and-beam homes with floor registers and panned-joist returns pull crawlspace air straight into the house. That gets fixed by sealing the joist panning, not by cleaning.

Check it yourself first. Open the attic hatch and look for a collapsed loop. Feel the ceiling near a register for damp drywall. Count your returns, since one central return on a large house usually means high static and whistling.