Duct Repair & Sealing Cost - Tested First, Written Price Second

Every visit starts with

Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents

Worth knowing

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.

Styles & brands we work with

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Before & after – our own jobs

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How Much Does Duct Repair & Sealing Cost in Round Rock?

Duct repair and sealing in Round Rock, TX typically costs between $350 and $1,200 for most homes, with the average job landing around $550 to $750 when addressing a mix of leaking joints, disconnected flex duct sections, and mastic sealing across a standard single-story layout. Larger two-story homes in Round Rock neighborhoods like Teravista or Highlands at Mayfield Ranch – where attic runs are longer and more complex – can reach $1,400 to $2,200 depending on access and the number of duct runs affected.

Every CleanRun job starts with a written price before a single panel comes off, under Duct Repair & Sealing in Round Rock pricing terms that match Haven Standard Clause 1. No “call for a quote” – the number is on paper before any work begins.

Duct Repair & Sealing Cost Breakdown (2026)

The table below reflects real pricing for the Round Rock market in 2026. Costs vary based on what the camera finds inside the system, how many duct runs need attention, and where those runs are located in the home.

What Pushes the Price Up

The single biggest cost driver in Round Rock is attic access. Round Rock summers push attic temperatures above 130 degrees Fahrenheit for months at a time, which degrades flex duct faster than in cooler climates and makes attic work physically demanding and time-consuming. When the camera shows disconnected duct runs deep in a sealed attic space – a situation we see regularly in homes off A.W. Grimes Boulevard built in the late 1990s – the labor cost reflects that reality directly.

A second factor is system age. Homes built before 2005 in Round Rock frequently have R-4 or R-6 flex duct that was undersized from the start or has since collapsed at bends. Replacing and resealing those sections costs more than sealing intact metal ductwork because the old material has to come out first. The written price we deliver before work starts will itemize each section so you know what you’re paying for and why.

Finally, the method matters. Mastic sealing is more durable than foil tape in an Austin-area attic – the adhesive on tape fails in extreme heat cycles – but it takes longer to apply. Aeroseal is the highest-cost option and is best suited to systems where the leaks are confirmed but physically inaccessible. We’ll tell you which method fits your duct condition, based on what the camera shows, not on which option carries the higher ticket.

What Affects Duct Repair & Sealing Pricing in Round Rock

• Attic configuration and access. Round Rock’s dominant housing stock – slab-on-grade construction with attic-mounted ductwork – means most repairs happen in confined, high-heat spaces. Homes in Teravista with vaulted ceilings and long horizontal duct runs in tight attic cavities take longer to reach and longer to seal correctly. That labor time is in the price.
• Number of duct runs and total linear footage. A home with 10 supply runs and 4 return runs costs more to seal than one with 6 and 2. The CleanRun technician photographs each run individually, so the scope is documented before the price is finalized – you’re not guessing at how many runs are actually in the system.
• Duct material. Metal ductwork with failing seams is typically sealed with mastic or foil tape. Older or damaged flex duct often needs partial or full replacement before any sealing makes sense. The camera shows what’s inside; the written scope names what material is there and what it needs.
• Age and condition of the system. Round Rock saw heavy residential construction from 1998 to 2008. Homes from that window often have ductwork that has never been inspected or sealed since installation. Finding three or four disconnected joints in a single inspection is not unusual in those neighborhoods – each disconnected joint is a separate line item in the written price.
• Round Rock’s climate load on duct systems. The combination of extreme summer heat and high humidity in Central Texas creates a specific failure pattern: duct boot seals (the connection between the duct and the floor or ceiling register) crack and shrink over time, pulling away from the drywall and creating gaps that pull unconditioned attic air directly into the system. Resealing boots adds to total cost but has a direct impact on air quality and energy use.
• Sealing method selected. Mastic brush application, foil tape, and Aeroseal each carry different labor and material costs. The choice is driven by duct condition and leak location, and the written price will state which method is being used and where. We don’t mix methods silently and bill as if it were one.

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How to Save on Duct Repair & Sealing in Round Rock

Start with a Camera Inspection, Not an Assumption

The worst money spent on duct repair is money spent on the wrong repair. We’ve been inside systems in Paloma Lake and Stone Canyon where a homeowner paid another company to “seal everything” and the camera on our visit showed untouched leaks at every elbow because the previous crew worked from the outside of the duct without confirming the interior. At CleanRun, every run is photographed before work begins. That photo record is what defines the scope – not a guess from the hallway.

Calling (737) 259-5752 gets you a free estimate backed by an actual inspection, not a number pulled from a square footage formula. The written price reflects what the camera found.

Combine Duct Repair with Duct Cleaning

If the ductwork needs both cleaning and sealing – which is common in Round Rock homes that haven’t had service since the original HVAC installation – scheduling both together on one visit costs less than two separate mobilizations. The technician is already inside the system for the cleaning; identifying and photographing sealing needs during the same visit eliminates a second setup fee. We quote the combined scope as a single written price so you can see exactly what you’re saving.

Our home page outlines the full range of services available, including how cleaning and sealing are typically scoped together for homeowners who want a single documented result.

Get a Second Opinion on Any Written Estimate

If you have a written estimate from another company, bring it to us. CleanRun offers a free second opinion on any written quote – we put our own number next to theirs in writing, with the methodology stated clearly. This isn’t a pricing game; it’s documentation. If their price is lower and their scope is identical, you’ll know that on paper. If the scopes differ, you’ll know that too.

Address Duct Boot Seals Proactively

In Round Rock homes built on slab foundations, the duct boot seals at floor registers are a common failure point that most homeowners don’t know to ask about. Sealing boots is among the lowest-cost line items in duct work – typically $15 to $35 per boot – and skipping it means conditioned air is escaping at the register itself, which undermines every other repair upstream. Ask specifically whether boot seals are included in any estimate you receive. In CleanRun’s written scope, they’re listed individually.

Don’t Wait Until the System Fails

Round Rock’s summer HVAC demand is hard on duct systems. A 20% duct leakage rate – which is common in homes that have never been sealed – means the air handler is working harder than it should every time temperatures clear 100 degrees. Addressing duct leaks before the peak of summer costs the same as addressing them during it, but you avoid the service delays that come with every HVAC-related call in July and August in Williamson County. The repair cost doesn’t go up with urgency at CleanRun – the written price is the written price – but lead times do tighten in peak season.

FAQs – Duct Repair & Sealing Cost in Round Rock, TX

How much does duct sealing cost in Round Rock, TX?

Duct sealing in Round Rock costs $350 to $950 for most homes, depending on size and the number of duct runs. Small homes under 1,800 square feet with accessible ductwork typically fall between $350 and $650. Mid-size homes in the 1,800 to 2,800 square foot range – which covers most of the housing stock in Forest Creek, Paloma Lake, and Walsh Ranch – run $600 to $950. Larger two-story homes with complex attic layouts can reach $1,400 to $2,200. The written price you receive before work starts will list every run, every sealing method, and every line item. Call (737) 259-5752 for a free estimate specific to your home.

Is Aeroseal worth the extra cost in Round Rock?

Aeroseal typically costs $1,400 to $2,800 in the Round Rock market and is most worth it when leaks are confirmed but physically unreachable with mastic or tape – deep in a sealed soffit, inside a wall cavity, or in flex duct sections that can’t be accessed without opening drywall. The technology works by pressurizing the duct system and injecting a polymer aerosol that bonds to the edges of leaks from the inside. In Round Rock homes with serious leakage in hard-to-access attic runs, it can seal leaks that no brush or tape application would reach. In a home where the leaks are at accessible joints and boots, mastic sealing at $500 to $900 delivers the same result at a third of the cost. CleanRun’s camera inspection identifies which situation you’re in before the price is written. Call (737) 259-5752 to find out which method your system actually needs.

How long does duct sealing last in a Central Texas climate?

Properly applied mastic sealing lasts 15 to 25 years in Central Texas attic conditions. Foil tape carries a shorter service life in this climate – typically 7 to 12 years – because the adhesive degrades under repeated heat cycling above 120 degrees. Round Rock’s attics regularly exceed that threshold from May through September. This is why CleanRun specifies mastic as the primary sealing method on attic duct runs and uses foil tape only in conditioned or semi-conditioned spaces where temperature cycling is less severe. The written scope on every job states which method is used where, so you know exactly what was applied and can hold the documentation against the 365-Day Done Right Promise if anything fails in the first year.

Can duct sealing actually lower my energy bill in Round Rock?

The EPA estimates that leaky ductwork can account for 20 to 30 percent of conditioned air loss in a typical home. In Round Rock, where an average household runs a central HVAC system for 8 to 10 months a year and summer electric bills routinely reach $280 to $400 per month, reducing duct leakage by even 15 percent can produce measurable savings – $30 to $90 per month during peak cooling season in a mid-size home. The exact savings depend on the pre-repair leakage rate and how the system is used. CleanRun doesn’t guarantee a specific energy-bill reduction because too many variables sit outside the duct system, but the physics are straightforward: less conditioned air escaping into unconditioned attic space means less runtime, which means lower consumption. Call (737) 259-5752 to find out what your system’s leakage looks like on camera.

Should I repair my ducts or replace them entirely?

Repair is the right call when the duct structure is intact and the problem is at joints, seams, and boots – which covers the majority of Round Rock homes built after 1998 with flex duct in decent physical condition. Replacement makes more sense when the flex duct inner liner has collapsed at multiple bends, when the insulation has been compromised by moisture or pests, or when the system was undersized from the start and no amount of sealing will fix the airflow problem. In Round Rock homes built in the 1995 to 2003 window – common in Round Rock proper and parts of Georgetown Road corridor – we frequently find a mix: some runs that need sealing only and others where a 10-foot section needs full replacement before sealing does anything useful. The written scope separates those line items clearly. A home where every run needs replacement is relatively rare; a home where a few sections need replacement and the rest need sealing is common. Call (737) 259-5752 and the camera will show you the breakdown before you commit to anything.

Does CleanRun offer a warranty on duct repair work in Round Rock?

Every CleanRun job in Round Rock is backed by the 365-Day Done Right Promise – if the repair isn’t right, we make it right, and that commitment is in writing on every job, not subject to manager approval or exception language. The photo record of every duct run before and after the work is the baseline for that warranty: if a sealed joint fails within the year, the before-and-after documentation shows exactly what was done and exactly what failed, and the resolution process starts from evidence, not from a conversation about what someone remembers. Call (737) 259-5752 to ask about what the 365-Day Done Right Promise covers for your specific repair scope before work begins.

Why Round Rock Homeowners Get a Camera Inspection First

Round Rock’s duct systems fail in specific, predictable ways that are different from what you’d see in a home in a cooler climate. The combination of extreme summer heat in unconditioned attic spaces, the prevalence of flex duct in homes built during the 1998 to 2008 construction boom, and slab-on-grade construction that routes almost all duct runs through the attic creates a consistent failure pattern: duct boot seals pull away from the drywall, flex duct inner liners collapse at bends, plenum connections work loose over years of thermal expansion and contraction, and the adhesive on originally-installed foil tape gives out well before the duct system reaches the end of its rated service life.

None of that is visible from outside the duct. A technician who quotes you a sealing price based on square footage and a hallway conversation is quoting blind. The written price CleanRun delivers is based on what the camera found inside each run, documented in photos that become part of the permanent job record. In neighborhoods like Meadows at Chandler Creek and Turtle Creek Estates – where homes were built quickly during high-demand periods and duct installation quality varied significantly – that camera inspection has found conditions that would have been completely missed by a quote-from-the-outside approach.

Tomas Reyes built CleanRun on the premise that a customer who can see what was found, read a written price before work starts, and hold a written warranty afterward is a customer who doesn’t need to take anything on faith. That hasn’t changed since the first job in 2013, and it’s why over 52,000 homes have been served with the same process every time.

Key Takeaways

• Duct repair and sealing in Round Rock costs $350 to $1,200 for most homes; larger or more complex systems reach $1,400 to $2,200.
• Attic access, system age, duct material, and sealing method are the four biggest pricing variables in the Round Rock market.
• Mastic sealing outlasts foil tape in Central Texas attic conditions; the written scope will state which method is used and where.
• Aeroseal ($1,400 to $2,800) is justified when leaks are confirmed but physically inaccessible – not as a default upgrade.
• Every CleanRun job includes a camera inspection, a before-and-after photo record, a written price before work starts, and the 365-Day Done Right Promise in writing.
• Combining duct repair with duct cleaning on a single visit reduces total cost compared to two separate mobilizations.
• A free second opinion is available on any written estimate from another company – CleanRun puts its number next to theirs in writing.

Get a Written Price Before Any Work Starts

If you’re trying to figure out what duct repair or sealing should actually cost for your specific home in Round Rock, the most useful next step is a camera inspection with a written price attached to it – not a square-footage estimate from a phone call. CleanRun’s Duct Repair & Sealing services include a full camera inspection before any work begins. CleanRun’s technicians are background-checked, uniformed, and identified by name before they arrive. The photo record of your duct system – before and after – is included in every job at no additional charge.

Tomas Reyes and the CleanRun team are available by phone, answered by a live person, seven days a week. Call (737) 259-5752 to schedule a free estimate. The written price will be in your hands before a single panel comes off, under Haven Standard Clause 1 – that’s not a policy, it’s how every job has worked since 2013.

Pricing reflects the Round Rock market as of 2026. CleanRun Air Duct Cleaning Round Rock offers free estimates – call (737) 259-5752.

Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Round Rock, serving Round Rock, TX since 2013.