Duct Repair & Sealing in Austin, TX

Fast, Reliable Duct Repair & Sealing Across Austin

Duct repair and sealing in Austin typically costs $280–$650 for most residential jobs, with same-day service available throughout the metro area. Call (833) 315-4216 for a free estimate. Douglas and the Nova team have spent eight years focused exclusively on air duct and HVAC work here — we know the 150°F attics, the cedar pollen loads, and the failed tape seals hiding in Circle C and Steiner Ranch crawl spaces because we’ve repaired them ourselves.

Call (833) 315-4216

We’re based right here in Austin, not dispatched from Dallas or Houston. That means when your flex duct finally gives out during a July heat wave or your return boot starts pulling cedar pollen directly from the attic, we’re routing to your neighborhood — Allandale, Wells Branch, or out toward Hornsby Bend — without the multi-hour delays that leave you sweating through another 100°F afternoon. Our Duct Repair & Sealing team handles everything from mastic re-sealing of metal trunk lines to full flex duct replacement in attics where the temperature alone would shut down most generalist contractors.

Why Nova Air Duct Cleaning Service Austin Is Austin’s Preferred Duct Repair & Sealing Company

More than 1,255 homeowners have reviewed our work, and that 4.9-star average reflects something specific about how Douglas Ross runs this operation: he’s the lead technician on jobs, not a manager checking in from an office near MoPac. When we seal your ductwork or replace a crushed flex run in a Brentwood ranch home, Douglas is the one handling the mastic gun and verifying every connection. That owner-accountability model is rare in this trade, and it’s why our review volume dwarfs most independent duct companies in Central Texas.

We’ve built our entire business around one trade — eight years of nothing but duct cleaning, repair, sealing, and air quality work. No carpet cleaning side hustle, no general HVAC installs to pad revenue. That specialization means we carry the right parts for Austin’s two dominant housing stocks: the aging metal ductwork in 1960s Allandale ranches and the deteriorating flex systems in 1990s Steiner Ranch and Circle C builds. Our Rotobrush and Nikro equipment is professional-grade, not box-store vacuums rebranded for residential work.

From cleaning to repair to sanitizing, we handle the full scope. Most competitors clean and leave. We identify the disconnected boot dumping your conditioned air into a 150°F attic, seal it properly, and can follow up with Honeywell or Aprilaire filtration upgrades to catch the cedar pollen that’s already packed your duct interior. That’s the difference between a vacuum-and-go outfit and a technician who’s accountable for whether your system actually performs.

Our Duct Repair & Sealing Services in Austin

Duct Sealing

Austin’s combination of 150°F attic temperatures and cedar pollen loads makes proper duct sealing a health issue, not just an efficiency concern. We seal supply and return connections with mastic sealant — never tape alone — because tape fails predictably in our heat. In 1990s subdivisions like Circle C and Steiner Ranch, we routinely find original tape seals that have turned brittle and detached, creating gaps that pull attic air directly into your living space. Our sealing process includes pressure testing to verify we’ve eliminated leakage, not just covered it.

Flex Duct Repair

Flex duct in Austin fails faster than in any market we know. The inner liner degrades in sustained attic heat above 150°F; the insulation wrap compresses and loses R-value; sections get crushed by storage activity or sag between supports. We replace damaged runs with properly supported flex duct rated for our temperature extremes, and we always verify that the replacement path avoids the sharp bends and kinks that restrict airflow in tight Austin attics. Douglas recently replaced a 30-foot crushed run in a Steiner Ranch home where the original flex had been dumping cooled air into the attic for three summers.

Metal Duct Repair

Central Austin’s 1950s–70s ranch homes in Allandale, Crestview, and Brentwood often contain galvanized metal trunk lines that have developed seam separations, rust at condensate collection points, or damage from decades of amateur modifications. We repair metal ductwork with proper sheet metal patching, re-seal longitudinal seams with mastic, and reinforce connections that have worked loose from thermal expansion cycles. These older systems weren’t designed for the MERV filtration we now recommend, so we often modify return plenums to accommodate higher-efficiency filter cabinets without choking airflow.

Duct Insulation

Unconditioned attic ductwork in Austin needs robust insulation — and most original installations no longer provide it. We replace degraded insulation wraps on flex duct and add external insulation to metal lines where condensation forms during our spring and fall humidity swings. Proper insulation prevents the temperature differential that causes moisture accumulation at boot connections, a mold trigger we see far more often here than in drier Texas markets like El Paso. For homeowners in North Austin corridors where attics reach extreme temperatures, upgraded insulation often pays for itself in reduced cooling load within two seasons.

Mastic Sealant Application

Mastic is the only sealant we trust for Austin conditions. Brush-applied mastic remains flexible across temperature extremes, fills irregular gaps that tape can’t bridge, and outlasts any adhesive product in sustained 150°F heat. We apply mastic to every connection, transition, and boot seal — not as an upgrade, but as our baseline standard. The extra labor cost is modest; the performance difference against tape is dramatic, especially in homes where attic access is limited and re-repair would require significant demolition.

Air Leak Repair

Disconnected boots, separated collar connections, and damaged access panels create the pressure imbalances that pull unfiltered attic air into your system. We pressure-test to locate leaks that visual inspection misses, then repair with mechanical fastening plus mastic sealing. In Austin’s cedar fever environment, every leak is a direct path for ultra-fine pollen to bypass your filter and recirculate through bedrooms and living spaces.

Trusted Brands We Service in Austin

We stock parts and partner with manufacturers who understand Texas conditions. Our Rotobrush and Nikro cleaning systems handle the pre-repair preparation that generalists skip. For filtration and air quality upgrades after sealing work, we install Honeywell and Aprilaire media cabinets and whole-home purifiers — the same brands specified in new Austin builds where indoor air quality is a selling point. We don’t have to order these and make you wait; we carry the common sizes for Austin’s dominant HVAC configurations, which means most sealing-and-upgrade jobs finish in a single visit.

Common Duct Repair & Sealing Problems We See in Austin Homes

• Tape-sealed flex joints failed from attic heat. In 1990s tech-boom subdivisions like Circle C and Steiner Ranch, speed-installed tape has universally degraded after 20+ years of 150°F summers. We routinely find duct sections dumping conditioned air directly into attics while pulling cedar pollen through disconnected returns.
• Crushed or sagging flex duct from degraded support straps. Austin’s attic heat hardens the plastic support straps originally installed to hold flex runs in place; once the strap fails, the duct sags, kinks, or gets crushed by storage activity. Airflow drops, system runtimes extend, and utility bills climb.
• Condensation and mold at duct transitions. Spring and fall humidity swings create moisture accumulation at boot connections and plenum transitions — far more common here than in drier Texas cities. We seal and insulate these vulnerable points to interrupt the mold cycle.
• Return boots pulling unfiltered attic air. When return duct connections fail in Austin’s pollen-heavy environment, the system bypasses your filter entirely. We’ve opened return plenums packed with cedar pollen and attic debris that homeowners have been breathing for seasons.

Pricing for Duct Repair & Sealing in Austin, TX

We Also Serve Cities Near Austin

Our service radius covers the full Austin metro, including Hornsby Bend to the east, Anderson Mill and Jollyville in the northwest corridors, and Wells Branch up the I-35 corridor. Same owner-led service, same equipment, same cedar-pollen expertise — whether your ductwork is in a 1970s ranch near Burnet Road or a 2000s build near Lake Creek Parkway.

FAQs — Duct Repair & Sealing in Austin