Whole-home duct cleaning
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Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterHow Much Does Duct Repair & Sealing Cost in Austin?
Duct repair and sealing in Austin typically runs $450 to $2,800, with most standard jobs landing between $750 and $1,600. The spread comes down to access (attic versus crawl space), how much of your ductwork has failed, and whether we’re repairing a section or sealing the entire system. A simple visible leak fix at a supply boot might cost under $300, while a full reseal of a sprawling ranch house in Tarrytown can push past $3,000.
At Cardinal Air Duct Austin, you’ll get a written price before any work starts. Not an estimate you have to sign off on, then watch climb once the tech finds “surprises.” The number we hand you is the number you pay. Omar Haddad and our Austin crew have been doing it that way since day one, because a home service call shouldn’t feel like a negotiation.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what we’re seeing across the Austin metro as of 2026. These ranges reflect real jobs in neighborhoods like Hyde Park, Mueller, Circle C, Wells Branch, and Allandale, not national averages pulled from a database.
| Service | Typical Austin Price Range | What It Includes |
|---|---|---|
| Minor leak repair (single boot or joint) | $150 – $450 | Mastic sealant, foil tape, or a short flex-duct patch at one accessible location |
| Moderate repair (2-4 leaks or damaged sections) | $450 – $950 | Multiple access points, replacement of short duct runs, resealing supply and return connections |
| Whole-system duct sealing | $800 – $1,600 | Full inspection, sealing of all accessible joints and boots, pressure or airflow testing before and after |
| Duct replacement (per 10-ft flex run) | $250 – $450 per run | Removal of collapsed or mold-contaminated flex duct, new R-6 or R-8 flex, new connections |
| Full duct replacement (1,800-2,500 sq ft home) | $2,200 – $5,800 | Complete removal and replacement of all supply and return ducting, new plenum connections, sealing throughout |
| Aeroseal-style aerosol sealing (if applicable) | $1,800 – $3,200 | Whole-system sealing from the inside using pressurized aerosol, typically for ductwork in inaccessible chases |
These numbers assume standard construction: flex duct in accessible attics, single-story or two-story with interior chases. The moment you’re dealing with a pier-and-beam crawl space in Hyde Park or a mid-century ranch where ducts run through concrete slab channels in Crestview, pricing shifts.
What pushes cost up: ductwork buried under blown-in insulation (extra labor to expose and re-cover), cramped attics with low pitch, duct runs through finished ceilings requiring drywall access, and mold or pest damage that means replacement rather than repair. What pushes cost down: accessible attic ductwork, single-story homes, newer systems where duct connections have simply loosened rather than failed.
What Affects Duct Repair & Sealing Pricing in Austin
- Access and attic conditions. Austin summers put attic temperatures over 140°F. A tech working in a low, hot attic in Brentwood for three hours is doing a different job than one in a shaded, open attic in Steiner Ranch. Labor time equals labor cost.
- Duct material and age. Homes built in the Austin boom years of 1995-2010 used a lot of gray flex duct that’s now hitting end of life. If your ducts are 20-plus years old and crumbling at the joints, sealing alone won’t hold. Replacement costs more upfront, but sealing failing material is throwing money at a symptom.
- Number and location of leaks. A single visible leak at a supply register is quick. Five leaks spread across supply and return plenums in a two-story home means a full day of crawling, cutting, and resealing.
- Whether the plenum is involved. The plenum is a metal box connecting the air handler to the ductwork. If that connection has separated, which is common in Austin homes where the air handler sits in an unconditioned attic or garage, the repair takes more material and skill than a simple duct joint.
- Testing requirements. Some Austin homeowners want before-and-after airflow or pressure testing to verify the seal. We use professional-grade equipment, including Nikro HEPA vacuums for debris removal and hand tools suited to the job, and we’re happy to do a before-and-after airflow check. That testing adds a modest line item but gives you actual numbers to confirm the fix worked.
- Mold or pest remediation. If leaky ducts in a damp Austin crawl space brought in moisture, or if squirrels in Allandale chewed through a return run, you’re dealing with remediation costs before sealing can happen. Austin’s humidity and active roof-rat population make this more common than homeowners expect.
Repair vs. Replace: When Sealing Is Enough and When It Isn’t
The honest answer, and the one Omar gives homeowners every week, is that sealing works when the duct material itself is still sound. If your flex duct is less than 12-15 years old, hasn’t been crushed by attic storage or wildlife, and the failures are at the connections, sealing is the right call and costs far less than replacement.
If the inner liner of your flex duct is torn, the insulation jacket is saturated, or the duct has collapsed in multiple spots, sealing is a band-aid. In Austin’s climate, air that leaks into a 140°F attic costs you real money every month from May through October. That’s when replacement starts making financial sense, because the energy savings from properly sealed, properly insulated ductwork in a Texas summer are significant.
If you’re deciding which path to take, our Duct Repair & Sealing in Austin page walks through what a full assessment looks like. Or call us and we’ll give you a straight answer based on what’s actually in your attic.
How to Save on Duct Repair & Sealing
- Get the whole system checked at once. Paying a trip fee for one leak, then another trip fee next season for a second leak, is the most expensive way to maintain ductwork. A full inspection and sealing job costs more on one invoice but less over two years.
- Schedule during shoulder season. Austin’s HVAC industry gets slammed in June, July, and August. If you can schedule duct work in October or March, you’ll often find more scheduling flexibility and occasionally better rates. Our written-price policy means the price doesn’t shift based on season, but technician availability does.
- Don’t ignore visible warning signs. Rooms that never cool properly, dust accumulating fast on registers, utility bills that climb every July, and visible gaps where ducts meet the ceiling are all indicators. Catching a du ct leak early usually means a $200 repair instead of a $1,400 sealing job after the problem spreads.
- Ask about combining services. If you need duct repair and a full cleaning, bundling them makes sense. Debris in the ducts can mask leak locations, and cleaning with our Rotobrush system and Nikro HEPA extraction before sealing means the sealant bonds to clean surfaces, not dust. Ask about a combined cleaning and sealing quote when you call.
- Get a written quote before committing. This one is simple. Cardinal Air Duct Austin provides a written price before any work starts, every time. Estimates are free. You’ll know the number before you open the door for us. Call (940) 283-6595 and a live person answers.
Why Duct Leaks Matter More in Austin Than Most Cities
Austin’s climate punishes leaky ductwork harder than most places in the country. Here’s why: from June through September, your attic can sit above 130°F for hours every afternoon. If your supply ducts are leaking conditioned air into that attic, you’re paying to cool space you’ll never occupy. If your return ducts are pulling 130°F air into the system, your air conditioner has to overcome that heat before it starts cooling your living space at all.
In Crestview, Mueller, and other neighborhoods with a lot of post-2000 construction, we regularly see homes where duct leakage accounts for 20 to 30 percent of total cooling load. That’s not a national statistic; that’s what our Austin techs measure in the field. Sealing those ducts isn’t just a comfort upgrade. It’s a direct cut to your summer electricity bill.
Duct leaks also pull air you don’t want into the system. In older Austin homes with pier-and-beam foundations, leaky returns in the crawl space draw in moisture, soil gases, and whatever else lives down there. In homes where the water heater or furnace sits in a garage, a leaky return can pull exhaust fumes into the living space. That’s a safety issue, not just an efficiency issue.
What to Expect From a Duct Repair & Sealing Visit
When you book with Cardinal Air Duct Austin, you’ll get the Relay Standard on every job. It starts with a live trackable arrival window, so you know when our tech will pull up before they get there. The technician is background-checked, in uniform, and you’ll know their name before they knock. No mystery contractor in an unmarked van.
The visit itself goes like this: we walk the system with you, identify failures at the plenum, boots, and duct runs, and show you what we’re seeing before we touch anything. Then we hand you a written price for the repair or sealing work. You approve it, we do the work, and we document everything with before-and-after photos. Your invoice arrives as a digital link you can pay from your phone. No paper carbon copies, no “the card reader is acting up.”
Every repair comes with a written guarantee. If a sealed joint fails within 365 days, we return and correct it at no charge. That’s the 365-Day Done Right Promise, and it applies to every job we book, no exceptions. Omar’s name is on the company, and he doesn’t hide behind fine print.
FAQs – Duct Repair & Sealing Cost
How much does it cost to seal ductwork in Austin?
Whole-system duct sealing in Austin typically costs $800 to $1,600 for a standard single-family home. The price includes a full inspection, sealing all accessible joints and supply boots with mastic or foil tape appropriate to the material, and airflow verification. Homes with difficult access, such as a low-slung attic or crawl space, can push the upper end higher. Call (940) 283-6595 for a free estimate and we’ll give you a written price for your specific floor plan.
Is it cheaper to repair ducts or replace them?
Repairing ducts is cheaper upfront, typically $150 to $950 for localized fixes, while replacement runs $2,200 to $5,800 for a full system. The deciding factor is duct material condition. If your flex duct is under 15 years old and failures are at connections, repair makes sense. If the duct is torn, collapsed, or water-damaged, replacement is the cheaper long-term choice because resealing failing material won’t hold. We’ll show you what’s actually failing before you decide.
Can you come today for duct repair in Austin?
We keep same-day slots available for urgent duct failures, especially when a return duct has separated and the house can’t cool. A live person answers 24/7 at (940) 283-6595, not a voicemail tree. Tell us what’s happening, and we’ll give you an arrival window you can track from your phone.
How much does it cost to fix one leaking duct joint?
A single accessible duct leak at a supply boot or joint typically costs $150 to $450 in Austin, depending on access. That covers mastic sealant, foil tape, or a short connector replacement at one visible location. If the leak is in a finished ceiling chase, the price rises because drywall access and patching are involved.
Does insurance cover duct repair in Austin?
Most homeowners insurance in Austin covers duct repair only when the damage is from a covered peril, such as a storm, fire, or a tree falling on the house. Normal wear and tear, age-related duct failure, or pest damage are generally excluded. We provide written documentation and photos with every job, which helps if you’re filing a claim. Call (940) 283-6595 and we can explain what your situation likely looks like.
Get a Straight Answer on Duct Repair Cost in Austin
You shouldn’t have to guess what duct work costs. You shouldn’t have to wait through a 45-minute phone maze to reach a person. And you shouldn’t have to watch a quoted price change once the tech is already on your property.
At Cardinal Air Duct Austin, none of that happens. Omar Haddad runs this location with one standard: a written price before work begins, a live trackable arrival window, before-and-after photos, and a 365-day guarantee on every repair. That’s the Relay Standard, and it’s how we’ve operated since the Relay Home Co. family was founded in 2005.
Call (940) 283-6595. A live person answers. You’ll get a free estimate, a straight answer, and a price that doesn’t move. That’s how duct repair should work in Austin.
Written by Omar Haddad, Owner at Cardinal Air Duct Austin, serving Austin since opening as part of the Relay Home Co. family, founded 2005. Pricing reflects the Austin market as of 2026. Cardinal Air Duct Austin offers free estimates – call (940) 283-6595.
What Our Customers Say
"They showed me before and after photos from inside the ducts."
- Carl R."Solid job. One return vent was missing a screw, but they sent a tech back to fix it the same day."
- Tracy D."Cleaning plus HVAC coil clean. Tech texted when he was ten minutes away. No surprises on the price."
- Evan S.