Duct Repair & Sealing Cost - We Measure the Leak Before We Quote

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 New Braunfels?

Our Duct Repair & Sealing services in New Braunfels, TX typically cost between $350 and $1,200 for most single-family homes, with the majority of jobs landing in the $450-$850 range. Full duct system replacements or heavily damaged flex duct runs in older Gruene-area homes can push past $1,500. A written price is delivered before any work begins – no exceptions, no surprises after the fact.

Duct Repair & Sealing Cost Breakdown (2026)

The table below reflects real pricing in the New Braunfels market as of 2026. These are the line items a CleanRun technician uses to build a written quote – the same numbers you see here are the numbers that appear on paper before a single panel comes off your system.

A few things drive the spread between the low and high ends of these ranges. New Braunfels sits in a climate band where attic temperatures regularly hit 140-150°F in July and August. That kind of heat degrades flex duct plastic liners faster than it does in cooler regions, and homes built between 1995 and 2010 in subdivisions like Creekside, Kensington Ranch, and Canyon Lake Forest tend to show deteriorated inner liner fabric – the kind of damage our camera identifies at the first elbow. Homes in the hill country fringe west of I-35 also sit on slab foundations with tight crawlspace access under the air handler, which adds labor time. The more inaccessible the ductwork, the more labor factors into the final number.

Conversely, a straightforward mastic seal job on a newer home in Veramendi or Meyer Ranch – where the duct layout is simpler and the runs are still in good mechanical shape – often comes in at the lower end of the range. The camera tells us which situation we’re in before any pricing is committed to paper.

What Affects Duct Repair & Sealing Pricing in New Braunfels

• Duct material and age: Flex duct, which dominates homes built in New Braunfels between 1988 and 2010, is more vulnerable to liner collapse and tear than rigid sheet metal. Replacing a collapsed flex run costs less per section than repairing warped or rusted rigid duct, but flex systems in attics often have more damaged sections because of the thermal cycling. The camera shows exactly how many sections need attention before we write a number.
• System access and attic conditions: Our technicians work in New Braunfels attics that regularly exceed 130°F during summer jobs. Tight attic access hatches, cramped joist clearances, and ductwork routed through narrow chases all add labor time. Homes in Gruene and older parts of downtown New Braunfels frequently have original duct layouts that were not designed with future serviceability in mind.
• Extent of leakage: A duct blaster test – a pressurization test that measures air escaping the system, expressed as CFM25 (cubic feet per minute at 25 pascals of pressure) – tells us how much total leakage we’re dealing with. A system leaking 15% of conditioned air requires more sealing labor than one leaking 6%. Texas Energy Code currently targets duct leakage below 6% for new construction; many existing New Braunfels homes test between 20% and 35%.
• Repair method selected: Mastic sealant applied by hand at joints and boots is the most durable sealing method, but it requires crawling each run and working in tight spaces. Aerosol injection – where a pressurized sealant mist travels through the duct system and adheres to leak points from the inside – costs more upfront but seals areas a technician physically cannot reach. Which method fits depends on what the camera finds.
• Number of runs and system size: A 1,600 sq ft home in New Braunfels typically has 8-12 supply runs and 2-4 return runs. A 2,800 sq ft home in Canyon Lake Forest or River Chase can have 18-24 supply runs plus a more complex plenum configuration. More runs means more labor, more mastic, and more documentation – the photo record covers each one.
• Whether a cleaning is done first: Sealing over debris-clogged ducts is a documented way to trap contaminants inside the system permanently. When our camera shows significant debris at the elbow transitions – which it does on the majority of pre-2005 homes we photograph in New Braunfels – a duct cleaning is quoted as a separate line item before sealing begins. Our Duct Repair & Sealing in New Braunfels page explains how we sequence these two services.

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How to Save on Duct Repair & Sealing

The clearest way to avoid overpaying for duct work in New Braunfels is to understand what you’re actually buying before you agree to a price. The $79 coupon companies that operate in this market use low-entry pricing to get access to your mechanical systems, then issue verbal upcharges once they’re inside. There is no line-item quote. There is no photo record. There is nothing to show a second opinion against. That pattern has a predictable outcome.

Here’s what actually controls your final number:

• Get a written scope before any work starts. Haven Standard Clause 1 means that at CleanRun, a written price is delivered before a single panel comes off – every time, with no exceptions. If a company won’t give you a number on paper before starting, that’s your answer about how the billing conversation will go at the end.
• Request a duct blaster test as part of the quote. Paying $125-$250 for a pre-repair leakage test is not an upsell – it’s the only objective way to know how much sealing your system actually needs and to verify the repair worked. A post-repair test is equally important: it gives you a documented CFM25 number to compare against the baseline. Without it, you’re trusting a verbal assurance.
• Combine duct sealing with a cleaning when the camera warrants it. Scheduling both services in a single visit reduces mobilization cost compared to two separate appointments. The camera photograph at the elbow transitions tells us whether cleaning is necessary before sealing – we won’t quote a cleaning that the evidence doesn’t support.
• Bring a competitor’s written estimate and ask for a free second opinion. CleanRun puts its own written number next to any written competitor quote at no charge. This works particularly well for larger jobs – full system replacements or whole-home aerosol sealing – where the spread between honest and inflated quotes can run $600 or more in the New Braunfels market.
• Address leaks before the next cooling season starts. In New Braunfels, that window is February through mid-March. Scheduling early means attic temperatures are workable (rather than 140°F), and it means your system is sealed and efficient before the first 95-degree week arrives in May. A system losing 25% of conditioned air through duct leaks before it reaches your living space is running your utility bills significantly higher than necessary every month it operates that way.
• Don’t defer a minor repair until it becomes a replacement. A single collapsed flex run at $95-$185 becomes a full trunk-line replacement at $350-$450 if the liner continues to degrade through another summer of thermal cycling. The camera shows us what stage the deterioration is at – that’s exactly why the photo record exists.

For a written price specific to your home, call (830) 549-6847. All calls are answered by a live person, and the estimate is free.

FAQs – Duct Repair & Sealing Cost in New Braunfels

How much does duct sealing cost in New Braunfels, TX?

Duct sealing in New Braunfels costs $280-$1,400 depending on the method and system size. Mastic sealant applied at joints and connections on a mid-size home typically runs $280-$550. Aerosol injection sealing – which reaches leaks inside duct walls that mastic cannot – runs $900-$1,400 for a whole-system treatment. A written quote is produced before work starts. Call (830) 549-6847 for a free estimate specific to your address and system layout.

Is it cheaper to repair or replace ductwork in New Braunfels?

Repair is almost always cheaper per job, but the right answer depends on what the camera finds. A single collapsed flex run at $95-$185 is a clear repair call. But if our camera photographs four or five runs in the same attic with deteriorated inner liners, torn outer jackets, and disconnected boot connections – which is a pattern we see regularly in New Braunfels homes built between 1995 and 2008 – replacement of the affected trunk lines at $200-$450 per run often costs less over five years than repeated repairs on material that has passed its service life. We put both numbers in writing so you can compare them directly.

Can duct leaks in New Braunfels actually affect my energy bill?

Yes, and the effect is measurable. A New Braunfels home with duct leakage at 25% – a number we document on a significant portion of pre-2010 homes we test here – is pushing one in four cubic feet of conditioned air into the attic rather than into the living space. At summer CPS Energy or GVTC utility rates, that leakage contributes meaningfully to monthly cooling costs. A post-repair duct blaster test produces a CFM25 number that documents the improvement; it’s part of the written job record every customer receives.

How long does duct repair and sealing take in a typical New Braunfels home?

Most jobs on a 1,500-2,500 sq ft home in New Braunfels run 3-6 hours. Mastic sealing on accessible runs is on the shorter end. Aerosol injection requires pressurizing the system, which adds preparation and cure time, and typically runs a full day. Attic temperature matters: summer jobs in New Braunfels require more frequent technician breaks because attic air can hit 140°F+, which extends total time on larger systems. We don’t rush attic work in that heat, and the written quote accounts for realistic labor time rather than a best-case estimate.

What’s included in a CleanRun duct repair quote in New Braunfels?

Every CleanRun written quote includes a line-item scope of work with per-section pricing, the repair or sealing method specified by name, and the documented photo record as a standard deliverable – photographs of the inside of each duct run before and after work, delivered to you as part of the job record. The 365-Day Done Right Promise is in writing on every job: if the work is not right, we make it right. There is no separate charge for the pre-work camera inspection or the photo record. The estimate itself is free – call (830) 549-6847 to schedule it.

Do I need a permit for duct repair in New Braunfels?

Minor duct repairs – patching a torn flex section, reseating a register boot, or applying mastic at accessible joints – typically do not require a permit in New Braunfels under the City’s adopted mechanical code provisions. Full duct system replacement, however, may require a mechanical permit under City of New Braunfels building department requirements, particularly if the work involves the plenum box, air handler connections, or significant modifications to the supply or return layout. CleanRun identifies permit requirements as part of the written scope before work starts. If a permit is required, that’s in the paperwork – not a conversation after the job is done.

Key Takeaways

• Duct repair and sealing in New Braunfels costs $350-$1,200 for most homes, with most jobs landing between $450 and $850.
• Aerosol whole-system sealing runs $900-$1,400; mastic sealing runs $280-$550; single flex section repairs run $95-$185 per section.
• New Braunfels attic temperatures (140°F+ in summer) and the prevalence of aging flex duct in pre-2010 subdivisions are the two largest local factors driving repair frequency and cost.
• A written price is delivered before any work starts at CleanRun – every time, with no exceptions (Haven Standard Clause 1).
• Every job includes a documented photo record of each duct run before and after work, and the 365-Day Done Right Promise is in writing on every job.
• A free second opinion is available on any written competitor estimate.
• All calls are answered live: (830) 549-6847.

About the Pricing on This Page

The dollar ranges above reflect real quotes issued to homeowners in New Braunfels and the surrounding communities of Seguin, Schertz, Kyle, Canyon Lake, and San Marcos. They are not national averages adjusted downward. CleanRun has been operating under the Haven Standard since 2013, and every number on a written quote is the number a customer pays – no verbal upcharges, no mid-job scope changes without a revised written price.

Tomas Reyes reviews the pricing structure used by CleanRun technicians to ensure it reflects actual local labor, material, and access conditions in the New Braunfels market. If a quote issued in the field does not match the ranges on this page, Tomas wants to know directly.

The professional-grade equipment used on CleanRun jobs – Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman – is available for customer verification before any agreement is signed. Equipment names are listed here because customers in New Braunfels should be able to look up independently what is being brought into their home and why.

Ready for a Written Price?

If you have a competitor’s written estimate, a specific concern about a run that isn’t cooling correctly, or you simply want to know what sealing your system would actually cost – call (830) 549-6847. A live person answers, the estimate is free, and the written price is on paper before anyone touches your ductwork. That’s not a policy subject to exceptions. It’s how every CleanRun job in New Braunfels starts.

Pricing reflects the New Braunfels market as of 2026. Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning New Braunfels, serving New Braunfels since 2013. CleanRun offers free estimates – call (830) 549-6847.