Air Duct Repair in Houston, TX

The back bedroom runs warm and the vent barely moves air

That symptom usually starts in the attic. R-6 flex gets strung over joists with long unsupported spans. It sags into a belly. Dust settles at the low point. Static pressure climbs and the farthest register starves. We re-hang runs on wide saddle straps, pull the inner liner tight, and shorten the path. Slack flex is wasted capacity.

Second common find is a slipped boot collar. The inner core backs off the sheet metal collar above a ceiling register. Conditioned air dumps into the attic. The return side then pulls attic dust back in. Repair means a drawband on the core, mastic on the collar, then insulation and vapor jacket resealed over it. Foil tape alone lets go in Houston attic heat.

Housing era changes the work. Pre-1960 galvanized trunks often hide crumbling internal fiberglass liner (that gets replaced, not cleaned). 1960s–80s ductboard plenums fail at corners and staple lines. Some 1950s–60s slab builds have under-slab ducts that hold silt and moisture; those get inspected before anyone promises a repair.

Returns matter more than homeowners expect. A single undersized central return, or an unsealed wall-cavity return, drags attic fiberglass, cellulose and gypsum dust right past the filter. Seal that path and indoor humidity usually settles down with it.