Fast, Reliable Duct Repair & Sealing Across Austin
Duct repair and sealing in Austin typically runs $280-$750 for most residential jobs, with same-day service available throughout the metro. We’re Bellows Air Duct & Vent Co., and we’ve been driving out to Austin from Los Angeles to handle the ductwork problems that local discount operators won’t touch properly. Our Austin customers call (844) 685-6342 because they want the job done right and never thought about again - the same reason they’ve stayed in their homes for twenty-plus years.
Austin’s a different animal than other Texas markets. The 140°F attic heat in July. The 1950s ranches off Barton Springs Road with original flex duct that’s never been touched. The east-side tract homes from the 2005 boom with attic-run flex that’s already collapsing. We know the ZIP codes - 78723, 78724, 78725, 73301 - and we know what fails in each housing era. Our technicians carry mastic sealant, flex duct, and metal repair stock for every common Austin configuration. Most repairs finish in one visit.
Why Bellows Air Duct & Vent Co. Is Austin’s Preferred Duct Repair & Sealing Company
We’ve been at this since 1984. That’s over 42 years of standing behind our work, and our 90-Day Done Right Promise is stamped on every Austin job in writing. If it’s not right, we return at no charge. No paperwork, no arguing. Ray Castillo built this company on that principle, and it’s non-negotiable.
Austin homeowners find us after the low-bid contractor disappears. They call because their neighbor in Wells Branch mentioned we actually answer the phone - a live person, 24 hours a day, not a voicemail tree. They stay because we show them camera footage of their ductwork before we quote a price, and the number on the phone matches the number on the invoice.
Our response time to Austin averages same-day to next-morning, depending on call volume. February and March are our busiest months here - Cedar Fever season drives a surge that Dallas and San Antonio don’t see. We plan for it. Our background-checked, uniformed technicians know to check for cedar pollen caking inside duct interiors, and they know which east-side attics hit 160°F by 2 PM in August.
We’re not the cheapest. We’re the square deal: one honest price, shown before we start. That’s the Bellows difference.
Our Duct Repair & Sealing Services in Austin
Duct Sealing
Unsealed duct joints leak 20-30% of conditioned air into Austin attics before it reaches your rooms. In a city where summer electric bills routinely hit $400+, that’s money burning off your roof. We seal with mastic - the brush-applied compound that hardens into a permanent, flexible bond - not tape that dries and curls in attic heat. A typical duct sealing job in Austin runs $280-$450 for a single-system home. We camera-inspect every joint before and after, so you see the difference.
Flex Duct Repair
Flex duct is the black corrugated tubing found in most Austin homes built after 1985, especially the post-2000 tracts across the outer east and northeast sides. It degrades fast in extreme heat. We regularly find flex duct in Austin attics where the inner liner has torn, pulling fiberglass insulation particles directly into the air stream. Flex duct repair in Austin typically costs $180-$340 per run, with full replacement at $95-$140 per linear foot when the damage is too extensive. We use professional-grade materials from Nikro and Rotobrush - the same brands serious HVAC contractors specify.
Metal Duct Repair
Central Austin’s 1950s-1970s ranches - the neighborhoods off Lamar, the streets near Zilker - often have original galvanized sheet-metal trunk lines that have never been serviced. Rust at seams, separated collars, and punctures from decades of contractors walking the attic are standard findings. Metal duct repair runs $320-$580 in Austin, depending on accessibility and extent. We cut and replace damaged sections, re-seal joints with mastic, and insulate exposed trunk to prevent condensation in spring humidity spikes.
Duct Insulation
Uninsulated or degraded duct insulation is a hidden problem in Austin’s older housing stock. When attic air at 145°F wraps around a cool supply duct, condensation forms inside the metal. That moisture breeds mold and rots flex duct from the inside out. Duct insulation in Austin costs $2.80-$4.50 per linear foot for standard R-6 wrap, with R-8 upgrade available for homes in the hottest attic zones. We insulate after sealing - never before, because sealing wet or dirty duct is sealing problems inside.
Mastic Sealant
Mastic is our primary sealing method for Austin conditions. Unlike foil tape that fails at 180°F or duct tape that turns to powder, mastic remains flexible from -20°F to 350°F. We brush-apply it to every joint, seam, and penetration in your duct system. A full mastic seal on an average Austin home runs $380-$620. The work takes 3-4 hours and is backed by our 90-Day Done Right Promise.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Austin
We stock parts and materials from Abatement Technologies, Rotobrush, Nikro, and Aprilaire - brands that hold up in Austin’s attic conditions. Our Aprilaire media filters are particularly popular during Cedar Fever season; the Model 5000 captures particles down to 0.3 microns, which includes mountain cedar pollen. We don’t show up hoping we have what you need. Our trucks carry flex duct, metal fittings, mastic, insulation, and filter housings for same-day completion. If you’re in Anderson Mill or Jollyville and need a specific component, we source from Austin HVAC suppliers with next-day backup - but most jobs never need it.
Common Duct Repair & Sealing Problems We See in Austin Homes
- Flex duct joints pulling apart in 140°F+ attics. Austin’s east-side tract homes from the 2005 construction boom have attic-run flex that degrades rapidly. The adhesive on factory joints softens and fails, separating the duct and drawing unconditioned attic air - and insulation particles - into your supply stream.
- Condensation inside ductwork from oversized AC systems. The 1990s-2000s suburbs were built fast, and many units are oversized for the load. They short-cycle in spring and fall humidity spikes, never running long enough to dehumidify. Moisture collects inside ducts, especially on uninsulated metal trunk lines.
- Decades of debris and rodent contamination in unsealed original duct. Central Austin ranches built 1950-1975 often have flex duct that’s never been serviced. Renovation debris from multiple flip cycles, rodent intrusion, and collapsed sections are standard. Standard brush cleaning can’t fix this without prior sealing and sectional replacement.
- Cedar pollen caking on duct interiors after bypassing standard filters. Ashe juniper pollen is fine enough to pass through 1-inch fiberglass filters. It accumulates on damp duct walls, creating a sticky mat that harbors mold and restricts airflow. We see this every February and March.
Pricing for Duct Repair & Sealing in Austin, TX
Here’s what duct repair and sealing costs in Austin’s current market:
| Service | Typical Range |
|---|---|
| Duct sealing (mastic, single system) | $280-$450 |
| Flex duct repair (per run) | $180-$340 |
| Flex duct replacement (per linear foot) | $95-$140 |
| Metal duct repair (sectional) | $320-$580 |
| Duct insulation (R-6, per linear foot) | $2.80-$4.50 |
| Full mastic seal (average home) | $380-$620 |
| Media filter upgrade (Aprilaire 5000) | $380-$520 installed |
These are honest numbers, shown before we start. What moves you within the range: attic accessibility (tight trusses add time), extent of damage (partial vs. full replacement), and whether we find secondary issues like disconnected returns or compromised plenums. We disclose everything on camera before quoting. No bait coupons, no price changes at the door. Call (844) 685-6342 for a free estimate - we’ll give you the exact number for your home.
Standing offers: $50 Off Any Repair Over $250. Free Second Opinion on Any Written Estimate. Permanent 5% Senior and Veteran discount.
We Also Serve Cities Near Austin
Our Duct Repair & Sealing team covers Hornsby Bend, Wells Branch, Anderson Mill, and Jollyville with the same response standards as Austin proper. Same camera inspection, same upfront pricing, same 90-Day Done Right Promise. If you’re in these communities and your ducts are leaking conditioned air into a 150°F attic, we handle it.
Serving Austin, TX - Our Local Coverage Area
We’re based in the Austin area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Duct Repair & Sealing in Austin
Cedar Fever pollen is fine enough to bypass standard 1-inch filters and accumulate on duct interiors, where it combines with moisture to form a restrictive, mold-friendly mat. The February-March surge happens because homeowners connect their allergy symptoms to the AC kicking on - and they’re usually right. We inspect with cameras, seal the leaks that let pollen enter, and upgrade filtration where needed. Call (844) 685-6342 for a free post-season inspection.
Post-2000 tract homes across Austin’s east and northeast sides used attic-run flex duct systems that degrade rapidly in extreme attic heat. Austin attics hit 140-160°F regularly, softening adhesive joints and accelerating liner breakdown. A 2005 build is now 20 years old - right in the failure window. Flex duct repair or replacement is typically needed at this age in Austin conditions. We’ll camera-inspect and give you an exact quote - estimates are free.
Most 1960s Central Austin ranches have original galvanized sheet-metal trunk lines with flex duct branches added later. The metal usually needs seam sealing and spot repair; the flex branches often need full replacement after 60 years. We camera-inspect to determine which applies to your specific system. A typical 1960s ranch in the 78704 area runs $450-$780 for combined metal repair and flex replacement. Call (844) 685-6342 to schedule.
Yes. Quality mastic is rated from -20°F to 350°F, well above Austin’s peak attic temperatures. We use professional-grade compound applied to clean, dry surfaces - not the thin “mastic tape” some contractors substitute. Properly applied, it outlasts the ductwork itself. We’ve sealed systems in Austin attics that have held for 15+ years through repeated 160°F summers.
Homes near Lady Bird Lake experience slightly higher ambient humidity, but the bigger factor is your AC system’s sizing and runtime. Oversized units short-cycle and don’t dehumidify properly, causing condensation inside ducts - especially in spring and fall when the lake adds moisture to already-muggy air. We check for this during inspection and can recommend solutions beyond sealing if your equipment is the root cause. Free estimates: (844) 685-6342.
We recently sealed a 1970s sheet-metal duct system in the 78704 ZIP. The homeowner called after a two-week cedar-pollen headache that kicked up every time the AC ran. We found loose joints in the attic trunk - pulling superheated attic air at 145°F and cedar pollen into every room. We mastic-sealed every joint, insulated the exposed trunk, and installed an Aprilaire 5000 media filter. The homeowner reported no allergy symptoms the next day. That’s the Bellows standard.
Austin sits in the heart of Ashe juniper country, and the December-February Cedar Fever season releases some of the densest airborne pollen loads in North America. The pollen is fine enough to bypass standard 1-inch filters and cake duct interiors, creating a February-March surge in repair and sealing demand that doesn’t exist in Dallas, San Antonio, or Houston. Experienced Austin duct technicians know to check February and March calendars first - the week after the first hard cedar-pollen rain that ends the season is consistently the highest-call-volume stretch of the year. Homeowners who’ve lived through one Cedar Fever season are far easier to convert into recurring annual customers than anywhere else in Texas. This isn’t a generic pattern. It’s Austin-specific, and we plan our staffing and inventory around it.
Ready to stop losing conditioned air to your attic and stop breathing cedar pollen every time the AC kicks on? Call Bellows Air Duct & Vent Co. at (844) 685-6342. We’ll camera-inspect your system, show you exactly what’s wrong, and give you one honest price before we lift a single tool. Most Austin jobs finish in a single visit. We’ll be there when we say - and we stand behind it for 90 days, in writing.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Austin since 1984.