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.

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Before & after – our own jobs

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How Much Does Duct Repair & Sealing Cost in The Woodlands?

Our Duct Repair & Sealing services in The Woodlands, TX typically run between $350 and $1,200 for most single-family homes, with the average job landing around $600-$750. Heavily damaged systems, inaccessible attic runs, or large homes in Creekside Park or Carlton Woods where square footage exceeds 3,500 sq ft can push costs toward $1,500 or more. Every CleanRun job starts with a written price before any panel comes off – no guessing, no “we’ll know more once we get in there.”

Duct Repair & Sealing Cost Breakdown (2026)

The table below reflects what CleanRun sees in the The Woodlands market in 2026. These are real ranges from real jobs – not national averages pulled from a database. Prices vary based on access, damage type, duct material, and system size, which we cover in the next section.

A few things push costs up or down significantly. Homes in The Woodlands built before 1995 – particularly in Village of Grogan’s Mill or Village of Panther Creek – often have original flex duct that has never been replaced. The inner liner on that material becomes brittle in our climate: summers with sustained heat above 95°F and attic temperatures that can hit 140°F accelerate deterioration faster than national averages assume. When we photograph those runs, we regularly find collapsed sections and detached collars that have been quietly losing conditioned air for years. That kind of damage moves a job from the lower end of the table toward the top.

On the other hand, a newer home in Creekside Park or Cochran’s Crossing with rigid sheet-metal trunk lines and only a few leaking seams can often be resolved with a targeted mastic application on two or three sections – a job that lands well below $400 and takes under three hours.

What Affects Duct Repair & Sealing Pricing in The Woodlands

• Duct material and age: Flex duct – the corrugated silver tubing common in Woodlands attics built between 1980 and 2005 – costs more to repair than rigid sheet metal because it’s more fragile to work around and more likely to require full-section replacement rather than a seam seal. Homes in Sterling Ridge or Cochran’s Crossing with newer rigid metal trunk-and-branch systems typically see lower per-section repair costs.
• Attic access and layout: The Woodlands has a significant share of homes where the ductwork runs through finished attic spaces or drops through interior soffits. Anytime a technician has to navigate low-pitch roof lines, blown-in insulation, or limited hatch access – which we see regularly in two-story homes near Hughes Landing – labor time increases. That time is reflected directly in the written price you receive before work starts.
• System size and number of runs: A 1,600 sq ft home in Indian Springs has a different duct footprint than a 4,500 sq ft home in Carlton Woods. More supply runs mean more linear footage to inspect, photograph, and seal. Pricing scales with the number of duct sections that need attention, not with square footage alone.
• Type of repair needed: Sealing a leaking joint with mastic sealant is a straightforward process. Replacing a collapsed flex run in a 130-degree attic, reattaching a plenum that has separated from the air handler, or re-routing a duct that was kinked during a renovation are more involved tasks that carry higher labor costs. The written scope you receive from CleanRun names each repair specifically – no line item called “miscellaneous work.”
• Aeroseal vs. manual sealing: Aeroseal – a pressurized polymer process that seals leaks from the inside of the duct system – is particularly useful for slab-on-grade homes where duct runs below the foundation are not accessible by hand. It costs more upfront ($900-$1,800 for a whole system) but can address leaks that manual sealing simply cannot reach. In The Woodlands, where many homes in the older villages sit on slab foundations, this is a realistic option worth understanding before you decide.
• Scope found during camera inspection: CleanRun photographs the inside of every duct run before and after work – that’s part of the standard job record, not an add-on. Sometimes the camera reveals damage that wasn’t visible at the register: a disconnected elbow, debris-blocked flex duct, or a pest intrusion point. If what we find changes the scope, the written price is updated and shown to you before any additional work begins. That process – document first, price second, work third – is Haven Standard Clause 1 applied in practice.

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Is It Worth Repairing Ducts, or Should You Replace the Whole System?

This is a legitimate question and one we get often from homeowners in The Woodlands who have already spent money on repairs that didn’t hold. The short answer: repair makes sense when the damage is localized, the duct material is otherwise sound, and the system is less than 15-20 years old. Replacement makes sense when flex duct has deteriorated throughout – inner liners cracked, outer jackets compressed, multiple disconnected collars – because patching individual sections of a system in that condition is a diminishing return.

The camera record we produce on every Duct Repair & Sealing in The Woodlands job is designed specifically to answer this question with evidence rather than opinion. If the before photos show a system with widespread deterioration, we say so in writing, show you what we photographed, and give you a price for both repair and replacement so you can make an informed decision. If the photos show a system with two or three problem spots and otherwise intact runs, we tell you that too – even if a full replacement would have been a larger invoice.

In neighborhoods like Alden Bridge and Grogan’s Mill, where many homes were built in the late 1980s and early 1990s, we find a mix: some systems that are remarkably intact and others that needed replacement a decade ago. There is no formula that replaces looking at what’s actually in the attic.

How to Save on Duct Repair & Sealing

There are real ways to reduce what you spend on this service. There are also ways that look like savings and aren’t.

• Get a written price before you agree to anything. This isn’t a tip about CleanRun specifically – it’s a baseline protection. Any contractor who won’t give you a written scope and dollar amount before starting work is structurally incentivized to find more problems once they’re inside your attic. The Woodlands market has no shortage of contractors who start with a low number and finish with a much higher one. A written price before work begins eliminates that risk.
• Combine duct sealing with duct cleaning when the system warrants both. If your duct runs have debris build-up – and in homes near the George Mitchell Nature Preserve or along Spring Creek, we often find pollen, insulation fibers, and organic material that accumulated during years of filter neglect – doing both services on the same visit costs less than two separate dispatches. The camera is already in the system; the scope is already documented.
• Use the Free Second Opinion. CleanRun offers a written second opinion on any competitor’s written estimate at no cost. If you have a quote from another contractor, bring it. We put our number next to theirs in writing so you can compare line by line – what’s included, what’s excluded, and whether the scope description matches the problem documented in your system. This is not a sales tactic; it’s a document you leave with regardless of whether you hire us.
• Don’t defer visible register boot problems. Separated register boots – where the duct boot has pulled away from the floor or ceiling – are one of the most affordable repairs on the list ($40-$90 per register) and one of the most impactful for air loss. In two-story Woodlands homes, register boots on second-floor ceilings that have detached can lose 15-20% of conditioned air volume before it reaches the room. Catching this early, before the disconnection creates a pest or moisture pathway, keeps the repair cost at the low end of the table.
• Understand what Aeroseal does and doesn’t solve before paying for it. Aeroseal is legitimately useful for inaccessible duct systems. It’s less useful as a substitute for repairing a physically damaged or disconnected duct run – polymer sealant cannot bridge a 4-inch gap in a separated flex collar. If a contractor recommends Aeroseal for a problem that is actually a disconnected run, the camera record will show that clearly. Knowing the difference can save you $500-$800 on the wrong solution.
• Call (346) 248-1474 for a free estimate. CleanRun dispatches a technician to photograph and document your system, delivers a written price, and leaves the documentation with you – at no charge and with no obligation. That documentation is yours whether you hire us or not.

The Woodlands Climate and Why It Makes Duct Integrity More Important Than Average

The Woodlands sits in a Gulf Coast climate zone that runs HVAC systems harder than almost any market in the country. Summer cooling seasons stretch from May through October. Attic temperatures regularly exceed 130-140°F during peak months. That sustained thermal stress accelerates the degradation of duct materials – particularly the polyester film inner liner used in flex duct – faster than what national repair guides assume.

The practical consequence: a flex duct system installed in 1998 in the Village of Panther Creek has experienced roughly 25 summers of those conditions. The same system installed in a comparable climate – Denver, say, or Portland – would likely still be intact. In The Woodlands, there’s a reasonable chance the inner liner has become brittle and the outer jacket has compressed at several elbows, restricting airflow before any seal fails.

High humidity is the second factor. When conditioned air leaks from supply ducts into unconditioned attic space, that cold air meets hot, humid attic air and creates condensation. In a The Woodlands attic, that condensation can promote mold growth on insulation and wood framing within a single summer season. Duct leakage here isn’t just an efficiency problem – it’s a moisture management problem with potential long-term consequences for air quality and structural materials.

None of this is meant to be alarming. It’s meant to be accurate. The homes that tend to have the worst duct conditions are those where the system has never been photographed from the inside and no one has looked at the joints since the original install. The homes in the best condition are generally those where a technician went up with a camera at some point and documented what was actually there.

What the CleanRun Process Looks Like (From First Call to Documented Job Record)

Understanding what you’re paying for is part of evaluating whether the price is reasonable. Here is what a CleanRun duct repair job in The Woodlands actually involves.

When you call (346) 248-1474, a live person answers – not a voicemail, not an automated system. You describe what you’re experiencing: uneven cooling between rooms, higher-than-expected utility bills, a room that never reaches temperature, or a previous contractor’s recommendation you want a second opinion on. We schedule a diagnostic visit at a time that works for your household.

The technician arrives in a marked vehicle, in uniform, and introduces themselves by name before entering your home. That’s Haven Standard Clause 3: Verified Crews – background-checked, uniformed, and identified before any work begins. The technician then performs a full camera inspection of the duct system using professional-grade equipment – the same Rotobrush and Nikro inspection tools we use on every home service visit in the The Woodlands area. Every run is photographed before anything is touched.

Based on what the camera shows, the technician writes a scope and a price. You receive both in writing before any work starts. If the scope is larger than you expected, you can ask questions, take time to decide, or request a second opinion. Nothing begins until you have a written price and have agreed to it. That’s Haven Standard Clause 1, and it applies without exception.

After repair and sealing work is completed, every duct run is photographed again. The before-and-after photo record is compiled and delivered to you as a standard deliverable – not something you have to request or pay extra for. That record documents the specific locations of repairs, the materials used, and the condition of the system after work is done. It’s what makes the 365-Day Done Right Promise meaningful: if you ever need to reference what was done and where, the record exists.

The 365-Day Done Right Promise covers every job in writing. If the work isn’t right – by any reasonable interpretation of that phrase – CleanRun makes it right. No manager approval process, no narrowly worded exclusions.

FAQs – Duct Repair & Sealing Cost in The Woodlands

How much does duct sealing cost in The Woodlands, TX?

Duct sealing in The Woodlands costs between $350 and $1,200 for most homes, depending on the number of sections sealed, the sealing method used, and the size of the system. A targeted mastic seal on two or three leaking joints in a mid-sized Woodlands home typically runs $200-$450. Whole-system Aeroseal for a larger home with inaccessible runs costs $900-$1,800. Every job at CleanRun starts with a written price – call (346) 248-1474 for a no-obligation estimate with a documented camera inspection included.

Is duct sealing worth the cost in The Woodlands?

Yes, in most cases. The U.S. Department of Energy estimates that leaky ducts can account for 20-30% of conditioned air loss in a typical home. In The Woodlands market, where HVAC systems run 6-7 months of active cooling per year, that loss translates to a material amount on monthly CenterPoint Energy bills. A repair job that costs $600-$800 can reduce annual cooling costs by $200-$400 depending on the severity of leakage and current utility rates – a payback period of two to four years. The camera inspection we provide before quoting tells you exactly what leakage exists, so you’re not guessing at whether the investment makes sense.

How long does duct repair take?

Most duct repair jobs in The Woodlands take 3-6 hours for a single-story home and 5-8 hours for a two-story home with multiple attic access points. Aeroseal installation takes 4-6 hours for a whole-system application, including pressurization time. Jobs involving full flex duct replacement across multiple runs can extend to two days for larger homes. The written scope you receive before work starts includes a time estimate alongside the price.

Can CleanRun repair ducts and clean them at the same visit?

Yes, and in many cases it makes sense to do both. If the camera inspection shows debris accumulation alongside leaking seams or damaged sections, combining duct cleaning and duct repair in a single visit costs less than two dispatches. CleanRun uses Nikro and Rotobrush equipment for cleaning and applies mastic sealant or mechanical repairs as a follow-on step in the same visit. The documented photo record covers both the cleaning and the repair work. Call (346) 248-1474 to describe your system and we’ll tell you in advance whether the visit is likely to involve both services.

What’s the difference between duct sealing and duct replacement in The Woodlands?

Duct sealing addresses leaks at joints, seams, and collars without replacing the duct material itself – costs range from $350 to $1,200 for most Woodlands homes. Duct replacement involves removing existing duct sections or runs and installing new material – flex duct replacement runs $200-$400 per run, and a full system replacement for a 2,500 sq ft home can reach $3,000-$6,000 depending on material and layout. The camera inspection determines which approach makes sense. A system with isolated leaking seams and otherwise sound duct material is a sealing candidate. A system with brittle, collapsed, or pest-damaged flex duct throughout is a replacement candidate. The before photos make that distinction objective rather than a matter of a contractor’s preference.

Does CleanRun serve all of The Woodlands, including Creekside Park and Carlton Woods?

Yes. CleanRun serves all villages and neighborhoods within The Woodlands, TX – including Grogan’s Mill, Panther Creek, Alden Bridge, Indian Springs, Cochran’s Crossing, Sterling Ridge, Creekside Park, and Carlton Woods. Service is also available in neighboring Spring, TX and surrounding Harris and Montgomery County communities. Response availability and scheduling can be confirmed by calling (346) 248-1474 directly.

Key Takeaways

• Duct repair and sealing in The Woodlands, TX costs $350-$1,200 for most homes in 2026, with Aeroseal whole-system sealing running $900-$1,800.
• The Woodlands climate – with attic temperatures reaching 130-140°F in summer – accelerates flex duct deterioration faster than national cost guides account for.
• Older villages including Grogan’s Mill, Panther Creek, and Indian Springs have a higher rate of original flex duct that may need replacement rather than sealing.
• Every CleanRun job includes a written price before work starts, a camera-documented photo record of every duct run, and the 365-Day Done Right Promise in writing.
• A Free Second Opinion on any written competitor estimate is available at no cost – bring the document, CleanRun puts its own number next to it.
• Call (346) 248-1474 to schedule a diagnostic visit with camera inspection and written price – no charge and no obligation.

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

Pricing reflects the The Woodlands market as of 2026. CleanRun Air Duct Cleaning The Woodlands offers free estimates – call (346) 248-1474.