Duct Repair & Sealing in Austin - Leakage Measured, Then Priced in Writing

Fast, Reliable Duct Repair & Sealing Across Austin

Duct repair and sealing in Austin typically costs $280-$650 for most single-system homes, with flex duct reconnection and mastic sealing running on the lower end and full metal duct rehabilitation in older neighborhoods climbing higher. Our crews are dispatched from the Austin office and carry the equipment to reconnect separated runs, seal metal seams, and restore static pressure the same visit.

Call (737) 243-9544

We’ve been working in Austin homes since 2013. The housing stock here tells a specific story: slab-on-grade construction pushes all ductwork through attics that hit 140°F+ for months each summer, and the 1990s-2000s building boom left tens of thousands of homes with flex duct that’s now reaching its thermal fatigue limit. When a homeowner in Wells Branch or Pflugerville calls about weak airflow at the registers, we don’t start with a vacuum. We start with a camera and a pressure gauge. The problem is usually not dirt. It’s a duct run that’s pulled apart, dumping conditioned air into the attic.

Our Duct Repair & Sealing team serves the full Austin metro, from Hyde Park pier-and-beam originals to the latest builds in East Austin. Call (737) 243-9544 for a written estimate before any work begins.

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

CleanRun is independently owned and operated under the Haven Standard, not a franchise. Tomas Reyes established the company in 2013, and we’ve since served more than 52,000 homes with one non-negotiable rule: every job starts with a written price, every duct run gets photographed before and after, and every customer receives the documented photo record as a standard deliverable. No exceptions.

Austin homeowners research before they call. We built our process for that. Our license number is published on every page, not buried in a footer. Our technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and they’re identified by name before arrival. The equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman - brands you can look up independently before agreeing to any scope of work.

The 365-Day Done Right Promise backs every job in writing, not as a policy subject to manager approval. If the work isn’t right, we make it right. We also offer a Free Second Opinion on any written estimate from a competitor: bring us their number, and we’ll put ours next to it in writing.

Dispatch and scheduling are coordinated from our Austin office. Crews serve Austin locally, and they know the difference between a 1998 tract home in Pflugerville and a 1954 pier-and-beam in Travis Heights. That knowledge changes what we find, what we fix, and what we quote.

Our Duct Repair & Sealing Services in Austin

Flex Duct Repair

This is the work we do most in Austin. The 1990s-2000s subdivisions in Pflugerville, Wells Branch, and older Cedar Park were built with flexible ductwork routed through attics that now hit 140°F+ every summer. After twenty-plus years of thermal cycling, the collar connections - the joints where flex duct meets the metal trunk line or register boot - pull apart or the inner liner collapses entirely. On a late-1990s build off Wells Branch Parkway in North Austin, our tech booked what looked like a routine cleaning and found the flex supply run to the primary bedroom had pulled completely off its collar at the air handler trunk, dumping conditioned air straight into a 140°F attic. We reconnected and mastic-sealed the joint, re-wrapped the insulation on two adjacent runs, and only then ran the Rotobrush with negative pressure and HEPA filtration - the static pressure reading dropped and the homeowner finally got airflow at the registers. Typical flex duct repair in Austin runs $280-$450 per run, depending on accessibility and whether the inner liner is salvageable.

Mastic Sealant Application

Mastic is a water-based, fiber-reinforced sealant we brush or spray onto duct seams and connections. Unlike foil tape, which degrades in attic heat, mastic remains flexible and airtight for decades. In Austin, we apply mastic to metal trunk lines in mid-century homes and to reconnect flex duct collars in 1990s builds. The long cooling season here - April through October - means ducts operate under near-constant airflow, so every unsealed leak is a year-round energy drain. Mastic sealing of an accessible trunk line in Austin typically runs $180-$320. We photograph every sealed joint and include it in the documented photo record delivered at job completion.

Air Leak Repair

Air leaks are what we measure, not guess at. We use a digital manometer to check static pressure across the system, then trace pressure drops to their source. In Austin’s older neighborhoods, leaks fall into two categories: separated flex duct connections in attic-routed systems, and unsealed longitudinal seams in original metal ductwork. The cedar fever cycle makes leaks worse than a comfort issue. Austin sits at the southeastern edge of the Hill Country, where Ashe juniper (mountain cedar) releases some of the densest pollen loads in North America each December through February. HVAC systems running nearly year-round in Austin’s heat pull this allergen-saturated air through ductwork every winter, and any leak in the return side draws that pollen directly into the system. Sealing those leaks is often the real fix for allergy symptoms that persist despite filter changes. Air leak repair in Austin, including diagnosis and sealing, typically runs $340-$580 for a single-system home.

Metal Duct Repair

Central Austin’s older neighborhoods - Hyde Park, Travis Heights, Bouldin Creek - contain mid-century pier-and-beam homes with original metal ductwork installed before modern air-sealing standards existed. The seams are unsealed, the supports have sagged, and the galvanized coating has degraded in places. We repair metal duct by realigning runs, replacing damaged sections with new galvanized steel, and sealing all seams with mastic. Metal duct repair in Austin runs $420-$680, with full replacement of a compromised trunk line climbing higher. We assess whether repair or replacement is the better value and put that recommendation in writing before any work starts.

Duct Insulation

When attic heat has degraded the insulation wrap on flex duct, we re-wrap with formaldehyde-free fiberglass insulation and vapor barrier, or replace the run if the inner liner is damaged. Proper insulation prevents condensation during Austin’s humid spring storm cycles and maintains supply air temperature from the air handler to the register. Duct insulation work in Austin typically runs $220-$400 per run.

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Trusted Brands We Service in Austin

CleanRun crews carry professional-grade equipment from Nikro, Honeywell, and Aprilaire - brands recognized in the HVAC trade for filtration, measurement, and restoration work. We stock common flex duct diameters, collar connectors, and mastic compounds at our Austin office, so most repairs don’t wait on parts orders. For specialized components, we source through Abatement Technologies distributors with next-day availability to the Austin metro. You can verify any piece of equipment we propose using before you sign the written scope.

Common Duct Repair & Sealing Problems We See in Austin Homes

• Flex duct collapsed at collar connections in Pflugerville and Wells Branch attics. The 1990s-2000s tract homes in these areas were built with flex duct routed through attics that now hit 140°F+ every summer. After years of thermal cycling, the connections pull apart and conditioned air dumps into unconditioned space. The cleaning can’t start until the duct is reconnected and sealed.
• Unsealed metal seams in Hyde Park and Travis Heights mid-century homes. Original metal ductwork in these neighborhoods was installed before modern air-sealing standards. The longitudinal seams shed conditioned air and, on the return side, pull in cedar pollen every winter. Mastic sealing is the fix, not replacement, in most cases.
• Insulation wrap degraded by seven-month cooling seasons. Austin’s cooling season stretches from roughly April through October, meaning ducts operate under near-constant airflow. That continuous thermal load compresses the timeline for insulation degradation and creates mold risk on duct surfaces during humid spring storm cycles.
• Partially crushed flex duct from attic traffic or original poor support. In homes built quickly during the 1990s-2000s boom, flex duct was sometimes laid across trusses without proper support straps. Over time, the weight of the duct itself or maintenance traffic in the attic compresses the airway, raising static pressure and reducing airflow at registers.

Pricing for Duct Repair & Sealing in Austin, TX

We Also Serve Cities Near Austin

Our crews regularly work in Austin and the surrounding communities: Pflugerville, Cedar Park, Manor, and Round Rock. The same written-price protocol, the same documented photo record, and the same 365-Day Done Right Promise apply in every city we serve.

FAQs - Duct Repair & Sealing in Austin