Trusted Duct Repair & Sealing for Austin Homeowners
Duct repair and sealing in Austin typically costs $350–$1,200 depending on the extent of damage, and most jobs are completed in a single visit. If your HVAC system runs constantly, rooms stay unevenly heated, or your energy bills have climbed without explanation, leaky or damaged ductwork is often the culprit. At Nova Air Duct Cleaning Service Austin, Douglas Ross and our team bring eight years of focused duct specialization and more than 1,255 verified reviews averaging 4.9 stars to every home we service. We don’t just patch problems — we diagnose them with professional-grade equipment, seal them properly, and verify results so your system performs the way it should. Whether you’re in Tarrytown, Riverside, or out toward Hornsby Bend, we’re set up for same-day response when your comfort can’t wait. Call (833) 315-4216 for a free, no-obligation estimate.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps, cracks, and disconnected joints that let conditioned air escape into your attic, crawl space, or walls before it ever reaches your rooms. In Austin’s climate, where summer attic temperatures routinely exceed 140°F, even small leaks force your AC to work harder and longer than necessary. Douglas and the Nova team use mastic sealant and metal-backed tape — not the failing duct tape you’ll find in big-box stores — to create permanent, code-compliant seals that hold up through our intense heat cycles.
Flex Duct Repair
Flex duct, the insulated flexible tubing common in Austin homes built from the 1980s through today, crushes, tears, and sags over time — especially in tight attic spaces where technicians have stepped on it or where it’s pulled loose from its supports. We see this constantly in neighborhoods like Crestview and Allandale, where original flex duct is now decades old. Our repair process replaces damaged sections with properly sized, insulated flex duct, re-supports it to prevent future sagging, and seals every connection with mastic for airflow that matches the original design.
Metal Duct Repair
Galvanized steel and aluminum ductwork, found in many Austin homes built before 1990 and in newer high-end construction, can corrode at joints, separate at seams, or develop holes from vibration and thermal expansion. Metal duct carries sound differently than flex, so leaks often announce themselves as whistling or rumbling that’s hard to ignore. Douglas Ross personally fabricates and installs custom sheet metal patches and replacement sections, sealing with mastic and mechanical fasteners that restore structural integrity and quiet operation.
Duct Insulation
Uninsulated or degraded duct insulation in Austin’s attic spaces is like running cold water through a garden hose left in the sun — by the time it arrives, it’s not what you started with. We replace collapsed, moisture-damaged, or rodent-compromised insulation with new fiberglass or foil-backed insulation sized to your duct diameter, properly sealed at all seams. This is especially critical for Austin homeowners in areas like Wells Branch and Pflugerville, where summer cooling loads are extreme and every degree of lost temperature costs real money on your monthly bill.
Mastic Sealant Application
Mastic is a thick, fiber-reinforced sealant that remains flexible after curing, making it the professional standard for duct sealing in Texas building codes — not tape alone, which degrades and fails. We brush or trowel mastic onto every joint, seam, and connection in your accessible ductwork, creating a continuous airtight barrier that outlasts the HVAC system itself. This is the same approach we use on both new sealing jobs and as the finishing step on every repair, ensuring no weak points remain.
Air Leak Repair
Air leaks in your duct system don’t just waste energy — they pull in attic dust, insulation particles, and humidity that degrades indoor air quality and can trigger allergies or respiratory issues. We pressurize your system and use smoke pencils or theatrical fog to pinpoint leaks that visual inspection misses, then repair each one with appropriate materials for that duct type. For Austin families with allergy sufferers or newborns, this precision matters: we’ve found that proper leak repair can reduce airborne particulates by 30% or more in homes where ductwork was the hidden source.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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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.
Brands We Service for Duct Repair & Sealing
We’ve worked extensively with Honeywell and Aprilaire systems, which are common in Austin homes with integrated air quality components like whole-house humidifiers, dehumidifiers, and media air cleaners. When we repair or seal ductwork connected to these systems, we understand how their airflow requirements differ from standard HVAC — an Aprilaire 600 humidifier, for example, needs precise static pressure to function correctly, and a poorly sealed bypass duct can throw off its performance entirely. Our experience with these brands means we don’t just fix the obvious leak; we verify that the repair preserves the engineered airflow for every component in your system.
We’ve also serviced and repaired duct systems paired with Abatement Technologies and Guardsman air quality equipment, often found in homes where previous owners invested in premium filtration or sanitizing systems. Whether you have one of these brands or any other make — Trane, Carrier, Lennox, Goodman, or a no-name builder-grade unit — Douglas and the Nova team can assess, repair, and seal your ductwork to manufacturer specifications. Our focus is on the duct system itself, which is brand-agnostic, but our familiarity with premium equipment ensures we never compromise the investment you’ve made in indoor air quality.
Signs You Need Duct Repair & Sealing Right Now
- Uneven temperatures from room to room. If your master bedroom in Westlake feels like a freezer while the kitchen in the same house stays stuffy, your ducts are likely leaking or blocked rather than properly distributing air. This isn’t just uncomfortable — it’s a sign your system is working overtime to compensate, shortening equipment life and inflating your Austin Energy bill.
- Dust that returns within days of cleaning. When ducts pull air from attic spaces through leaks, they introduce fiberglass particles, rodent droppings, and fine Texas Hill Country dust that circulates endlessly through your home. If you’re dusting more than once a week or noticing particles around vent registers, the source is often duct damage you can’t see.
- Whistling, rattling, or whooshing sounds when HVAC runs. These noises indicate air moving through gaps it shouldn’t, or duct sections that have separated and are vibrating against framing. In older Austin homes in Clarksville or Hyde Park, we’ve found original metal duct that’s literally pulled apart at seams after decades of thermal cycling.
- Energy bills that spike without explanation. A 20–30% increase in cooling costs during a normal Austin summer often traces directly to duct leakage, especially if your AC unit itself was recently serviced and found healthy. Leaky ducts can waste 20–30% of conditioned air before it reaches your living space — you’re paying to cool your attic.
- Musty or chemical odors when the system cycles on. Leaks in return ducts can pull in odors from crawl spaces, garages, or attic storage areas, while leaks in supply ducts can create negative pressure that draws humidity and mold spores into the system. Either way, your nose is detecting a duct integrity problem that needs professional diagnosis.
Our Duct Repair & Sealing Process — Step by Step
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Visual and physical inspection. Douglas Ross begins every duct repair job with a hands-on assessment of your accessible ductwork — attic, crawl space, basement, or mechanical closet — looking for disconnected joints, crushed flex, corroded metal, damaged insulation, and signs of pest intrusion. We document everything with photos so you see what we see, not just take our word for it.
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Pressure testing and leak detection. We seal your registers temporarily and pressurize the duct system to measure total leakage against the airflow your HVAC unit produces. For homes in Austin’s 78704 or 78731 zip codes where we’ve worked repeatedly, we know the baseline expectations for different construction eras and can spot problems that meet code but still waste energy.
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Targeted repair with appropriate materials. Based on what we find, we repair or replace damaged duct sections using materials matched to your system type — flex duct where flexibility matters, sheet metal where durability and sound control are priorities, and mastic sealant on every joint regardless of material. We don’t use duct tape for permanent repairs; it’s a temporary fix that fails within months in Austin’s heat.
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Insulation restoration. Any insulation disturbed during repair or found degraded gets replaced with new material of equal or greater R-value, properly secured and sealed at seams. In unconditioned attics — standard in most Austin homes — this step is non-negotiable for maintaining the temperature of air traveling through your ducts.
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Post-repair verification and airflow balancing. We re-test system pressure and measure airflow at key registers to confirm the repair achieved its goal. If we’ve sealed significant leakage, we may recommend minor register adjustments to prevent over-pressurizing rooms that were previously starved for air. You get before-and-after documentation, and we explain anything that still needs attention.
How Much Does Duct Repair & Sealing Cost in Austin?
A typical duct sealing job for an Austin home with 1,500–2,500 square feet runs $450–$850 when the ductwork is accessible and damage is limited to joint separation and small leaks. Flex duct repair for a single damaged section — common when a raccoon gets into an attic in neighborhoods like Barton Hills or Zilker — typically costs $200–$400 including materials and proper insulation replacement. More extensive metal duct repair or full-system sealing in larger homes, or jobs requiring crawl space work in areas like East Austin with pier-and-beam foundations, can range from $800–$1,200 or more depending on linear footage and accessibility.
Several factors move the price: how much of your ductwork is accessible without demolition, whether we find unexpected damage once we’re in the attic, and whether your system uses standard sizes or custom fabricated pieces. Austin’s building stock varies enormously — a 1950s bungalow in Rosedale has different challenges than a 2010s build in Circle C Ranch — and we price based on what your specific home requires, not a flat rate that overcharges simple jobs or underfunds complex ones.
The best way to avoid overpaying is to get a detailed, written estimate that breaks out labor, materials, and any contingencies. Cut-rate competitors often quote low and discover “surprise” problems mid-job; we use our inspection to identify issues upfront so your estimate reflects reality. Our free estimates include the full diagnostic process — pressure testing, visual inspection, and photo documentation — with no obligation to proceed. Call (833) 315-4216 to schedule yours.
Duct Repair & Sealing Near Austin — Our Service Area
We maintain full duct repair and sealing coverage throughout Austin proper and the surrounding communities where our customers live and refer their neighbors. From Lakeway and Bee Cave in the west to Manor and Pflugerville in the east, from Kyle and Duct Repair & Sealing in Buda southward to Wells Branch and Jollyville north of the river, we’re typically on-site within hours of your call. Response times average same-day in central Austin zip codes and next-day in outlying areas like Anderson Mill and Hornsby Bend, where we’ve built a strong base of repeat customers who appreciate not having to hire a separate company for duct cleaning, repair, and sealing. We also provide dedicated Duct Repair & Sealing in Shady Hollow for that growing community.
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.
Frequently Asked Questions — Duct Repair & Sealing in Austin
Duct repair and sealing is the process of fixing physical damage to your HVAC ductwork — tears, disconnected joints, crushed sections — and closing air leaks with professional-grade mastic sealant so conditioned air reaches your rooms instead of escaping into walls or attics. At Nova Air Duct Cleaning Service Austin, we handle everything from single flex duct repairs to whole-system sealing, always verifying results with pressure testing. Call (833) 315-4216 for a free estimate — we’ll show you exactly what your system needs.
Most residential duct repair and sealing jobs in Austin are completed in 3–6 hours, with larger homes or extensive damage occasionally requiring a return visit. We work efficiently but don’t rush the verification step — we’d rather spend an extra 30 minutes confirming your system is properly sealed than leave a leak that wastes your money for years. Douglas and the Nova team will give you a specific time estimate after inspection, before any work begins.
Typical duct sealing runs $450–$850, single-section flex duct repair $200–$400, and extensive metal duct repair or full-system work $800–$1,200 or more depending on home size and accessibility. Austin’s varied housing stock — from pier-and-beam cottages to modern two-story builds — means we price based on your specific situation after inspection, not a one-size-fits-all rate. Call (833) 315-4216 for an exact quote — estimates are free.
Yes — we’ve repaired and sealed ductwork connected to Honeywell, Aprilaire, Abatement Technologies, Guardsman, and every major HVAC manufacturer installed in Austin homes. Our expertise is in the duct system itself, which interfaces with all brands, but our familiarity with premium air quality equipment means we preserve your system’s engineered airflow and don’t compromise components you’ve invested in. Whether your equipment is new or decades old, we can help.
We prioritize urgent duct problems — completely disconnected trunk lines, major leaks causing AC shutdown, or damage from storms or pests — with same-day response when possible. While we don’t claim 24/7 availability we haven’t confirmed, we do everything we can to restore your comfort quickly during Austin’s brutal summer heat. Call (833) 315-4216 and we’ll tell you honestly what response time we can commit to.
We stand behind our workmanship with a satisfaction commitment — if a seal we applied fails or a repair we made doesn’t hold, we return and make it right. Specific warranty terms depend on the scope of work and materials used, which we detail in your written estimate before you approve any work. Our 4.9-star average across 1,255+ reviews reflects how seriously we take this accountability.
Clear a path to your attic access, crawl space entry, or mechanical room, and secure pets in a separate area since we’ll be moving between indoor and outdoor spaces. It’s helpful but not required to note which rooms feel uncomfortable or which vents seem weak — this clues us in to likely leak locations. We’ll handle everything else, including protective floor coverings and thorough cleanup when we’re done.
Schedule Your Duct Repair & Sealing Service in Austin Today
Don’t let leaky ducts drain your comfort and your wallet through another Austin summer. Douglas Ross and the Nova team are ready to inspect, diagnose, and permanently seal your duct system with the same hands-on expertise that’s earned us more than 1,255 verified reviews. Call (833) 315-4216 now for your free, no-obligation estimate — no pressure, no surprises, just straight answers from technicians who do the work themselves.
Written by Douglas Ross, Owner and Lead Technician at Nova Air Duct Cleaning Service Austin, serving Austin, Shady Hollow, Buda, and surrounding communities since 2016.