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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 Dallas?
Duct repair and sealing in Dallas, TX typically costs between $250 and $650 for most homes, with full duct sealing projects running $1,800 to $3,500 depending on square footage and how much of the system is leaking. Minor repairs like patching a small hole or reconnecting a loose section usually land in the $150 to $400 range. The national average sits around $1,200 for comprehensive work, but Dallas’s older housing stock, particularly in neighborhoods like Lakewood, East Dallas, and Richardson, often means more extensive deterioration than newer suburban builds in Frisco or McKinney.
These numbers reflect what homeowners actually pay in the Dallas market in 2026. We’ve priced hundreds of duct jobs across the metroplex, and while no two homes are identical, the ranges above cover roughly 90% of the repairs and sealing projects we quote.
Duct Repair & Sealing Cost Breakdown (2026)
Here is a line-by-line look at what duct repair and sealing costs in Dallas. Prices vary by home size, access difficulty, and the condition of your existing ductwork. Homes with crawl spaces or attic-mounted systems often cost more because the work is physically harder.
| Service | Typical Dallas Price Range | Notes |
|---|---|---|
| Duct inspection & diagnostic test | $75 – $200 | Often credited toward repair if you proceed same visit |
| Small hole or tear patch | $150 – $300 | Single access point, no drywall removal needed |
| Reconnecting or replacing a damaged section (per 10-foot run) | $200 – $450 | Flex duct runs in attics are common in Dallas homes built after 1980 |
| Full duct sealing (aerosol or mastic) | $1,800 – $3,500 | 2,500 – 3,500 sq ft home; includes pressure testing before and after |
| Supply vent or register replacement (each) | $40 – $90 | Includes sealing around the boot and reattaching to the duct |
| Return air duct repair | $300 – $700 | Returns are often undersized in 1980s Dallas tract homes – this is not a rare job |
| Insulation wrap for exposed ductwork | $500 – $1,200 | Attic ductwork in Garland or Mesquite loses R-value fast in July |
What moves the price: the number of access points, whether ducts run through finished ceilings (repair may require drywall cutting and patching), and whether you have sheet metal ducts (common in pre-1970 Dallas homes near White Rock Lake) or flexible duct (common in 1990s-and-newer builds). Sheet metal is easier to seal properly. Flex duct that has been kinked or crushed usually needs replacement, not repair.
What Affects Duct Repair & Sealing Pricing in Dallas
- Age of the home. Dallas has a deep stock of 1950s and 1960s ranches in areas like Casa View, Lake Highlands, and Farmers Branch. Those homes often have original metal ductwork with failing seams and no sealing at all. Fixing a 60-year-old system costs more than one installed in 2015.
- Attic accessibility. Most Dallas ductwork runs through the attic. In summer, attic temperatures routinely hit 130°F or higher. That heat makes the work slower, harder, and more physically demanding, which is honestly reflected in pricing. Spring and fall rates tend to be slightly lower simply because attic conditions are more workable.
- Number of leaks found during testing. Duct pressure testing is the only way to know how much air your system is losing. A system with two small leaks is a morning job. A system losing 30% of its airflow needs full sealing, and that is a full-day or multi-day project.
- Crawl space vs. attic vs. slab ducts. Some Dallas homes built in the 1960s and 1970s have ducts in concrete slabs. Those are the most expensive to repair because access requires either breaking concrete or rerouting ducts entirely. If your home has slab ducts, expect a higher quote than the tables above.
- Whether insulation replacement is required. In Dallas, attic ducts should be wrapped in R-8 insulation minimum. If the existing wrap is torn, water-damaged, or missing, sealing alone won’t stop energy loss. You will pay more for insulation wrap, but it pays back in lower cooling bills during Dallas summers.
- Mold or pest damage. Dallas humidity and rodent activity (especially in older neighborhoods with mature trees, like Preston Hollow or Oak Cliff) can mean ductwork is contaminated. If a repair reveals mold or nesting material, remediation adds to the total and should be handled before sealing.
How Much Does Duct Sealing Save on Energy Bills in Dallas?
Sealing leaky ducts in a Dallas home typically cuts heating and cooling costs by 20% to 30%, according to Energy Star data. For a typical 2,500-square-foot home in Dallas with an average summer electric bill of $300 to $400, that means $60 to $120 back in your pocket every month during peak cooling season. Sealing usually pays for itself within two to four years, sooner if the leaks are severe.
Dallas does not require a specific duct sealing permit for existing-home repair in most cases, but if ductwork is being rerouted or a new return is being added, the city may require a mechanical permit. A licensed contractor will know when one applies. Reputable companies pull permits when needed and include the cost in the quote.
How to Save on Duct Repair & Sealing
Here are practical ways to keep the cost of duct repair and sealing in Dallas reasonable without cutting corners that will cost more later.
- Get a written, itemized quote before the work starts. This is the single biggest money saver. If the price is not written down before a vent is touched, you are exposed to door-step revisions. At Kestrel Air Duct Dallas, the written price is in your hands before any work begins. No exceptions.
- Ask for a duct pressure test. A diagnostic test tells you exactly where the leaks are and how bad they are. Sealing only the leaks you have is cheaper than paying for a full-system seal you may not need.
- Combine sealing with cleaning. If your ducts need cleaning anyway, pairing the work saves on trip charges and setup time. It also means the sealant goes onto clean surfaces, which bonds better.
- Schedule in spring or fall. Dallas attics are brutal from June through September. Technicians work slower in extreme heat, and that can reflect in pricing. March through May and October through November are ideal windows in the Dallas climate.
- Ask about the guarantee in writing. A duct seal that fails in six months is a second invoice. The Kingswell Guarantee at Kestrel Air Duct Dallas means a free return visit if the repair fails within the guarantee period. That is documented in writing on every job, not extended as a courtesy at the company’s discretion.
- Call for a free estimate. Our estimates are free, and you’ll get a specific dollar range before you commit to anything. Call (361) 314-5449 and talk to a live person – not a voicemail queue.
Why Dallas Ductwork Fails More Often Than You’d Expect
Dallas is hard on ductwork. The combination of intense summer heat, high humidity in spring and fall, and the freeze-thaw cycles we get in winter all work against duct integrity. In neighborhoods with older housing stock like Lakewood, East Dallas, and Oak Cliff, we regularly find duct tape that has dried out and peeled, seams that have separated, and flex duct that has been crushed by attic storage or pest activity.
The most common failure we see in Dallas homes is not dramatic. It’s slow, invisible air loss from poorly sealed joints and connections. A duct system can lose 20% of its cooled air into the attic without the homeowner ever seeing a visible tear. The only reliable way to know is pressure testing.
Dale Whitmore, who leads the Kestrel Air Duct Dallas team, says homeowners frequently tell them the system “felt fine” until the July electric bill arrived. By then, the air conditioner has been working overtime for weeks, and the lost air has been cooling the attic instead of the living room.
What a Professional Duct Sealing Job Actually Looks Like
Understanding the process helps you evaluate any quote. Here is what a thorough duct repair and sealing visit should include in Dallas.
First, the technician locates every accessible part of the duct system: the supply plenum, return plenum, all branch runs, and every register. A duct pressure test (often called a duct blaster test) measures total system leakage. The fan is attached to the air handler, the registers are sealed temporarily, and the test shows exactly how many cubic feet per minute the system is losing.
Then comes the repair work. Damaged flex duct sections are replaced or reconnected. Sheet metal seams are sealed with mastic, a thick paste that dries to a permanent bond. Mastic is the industry standard; it outlasts foil tape by decades. For comprehensive sealing, an aerosol sealant may be injected into the system. This is the most thorough method and can seal leaks in spots a technician can’t physically reach, like ducts buried in a chase or running through a finished ceiling.
Finally, a second pressure test confirms the leakage has been reduced to an acceptable level. A reputable company will do both tests, not just one. If a quote does not include before-and-after testing, ask why.
Repair vs. Replace: How to Decide
Sealing is not always the right answer. Here is the quick rule we use in Dallas: if the duct system is less than 25 years old and the metal or flex material is intact, repair and seal it. If the ducts are pushing 40 years, full of mold or pest contamination, or so poorly designed that rooms have never heated or cooled evenly, replacement may be the cheaper long-term option.
Replacement in Dallas typically runs $4,000 to $9,000 for a full system in a 2,500-square-foot home, depending on whether the attic is accessible and how many registers are involved. That is more than sealing, but sometimes it is the only choice that fixes the problem permanently. A good diagnostic test will tell you which camp you are in.
How Kestrel Air Duct Dallas Prices Duct Repair and Sealing
Our pricing method is simple enough to explain in one paragraph: the written price is in your hands before a single vent is touched. No door-step revisions, no surprise add-ons, no vague “it depends” after the work has started. Dale Whitmore and the team at Kestrel Air Duct Dallas follow The Kingswell Way on every visit: say the price, show up in the window we gave, leave the place cleaner, put the guarantee in writing, come back if it fails.
Every job carries the 365-Day Done Right Promise. If the repair or sealing work falls short within a year of service, we come back and make it right at no charge. That promise is documented in writing on every job, not extended at our discretion. It is a standing commitment.
Our background-checked, uniformed technicians use professional-grade equipment: Rotobrush rotary brush systems to dislodge debris at the duct wall, Nikro negative-pressure units to pull contaminants out of the system, and Abatement Technologies HEPA filtration to keep loosened particles out of the living space during the work. These are real industrial tools, not a box-store shop vac.
We also offer Honeywell, Aprilaire, and Guardsman filtration products for homeowners who want to maintain cleaner air between service visits. See our Duct Repair & Sealing in Dallas page for full service details.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Dallas?
Full duct sealing in Dallas typically runs $1,800 to $3,500 for a 2,500 to 3,500 square foot home. Minor sealing of a few accessible leaks costs $250 to $650. Call (361) 314-5449 for a written, itemized quote specific to your home – the estimate is free.
Is it cheaper to repair or replace ductwork?
Repair is almost always cheaper in the short term, usually $250 to $650 for targeted fixes versus $4,000 to $9,000 for full replacement in Dallas. But if your ductwork is over 40 years old, contaminated with mold, or so undersized that rooms have never been comfortable, replacement may be the better long-term value. A pressure test tells you which path makes sense.
Can you repair ducts the same day?
Yes, most duct repair jobs in Dallas are completed the same day. Small patches and reconnections take one to three hours, and full-system sealing usually takes one full workday. We answer calls 24/7 with a live person, so call (361) 314-5449 and we’ll give you a straight answer on availability.
How much does it cost to fix a leaking duct in the attic?
Fixing a leaking attic duct in Dallas usually costs $150 to $450, depending on whether it is a small tear, a failed connection, or a crushed section that needs replacement. Attic access and summer heat can push that higher, but most attic repairs we quote land in that range.
What does the 365-Day Done Right Promise cover?
The 365-Day Done Right Promise covers the repair and sealing work we perform. If the work falls short within one year of service, Kestrel Air Duct Dallas returns and makes it right at no charge. The customer simply calls the number on their written guarantee, and we schedule the return visit. It is documented in writing on every job.
Get a Written Price Before You Commit
You should not have to guess what duct repair will cost. You should not have to worry that the number changes when the technician arrives. At Kestrel Air Duct Dallas, the written price is in your hands before any work begins, and the 365-Day Done Right Promise stands behind every job in writing.
Call (361) 314-5449 for a free estimate on duct repair and sealing in Dallas. You’ll talk to a live person, not a voicemail queue.
Pricing reflects the Dallas market as of 2026. Kestrel Air Duct Dallas offers free estimates – call (361) 314-5449.
Written by Dale Whitmore, Owner at Kestrel Air Duct Dallas, serving Dallas since 2004.
Return to our home page for more on our services and the Kingswell Guarantee.
What Our Customers Say
"Straightforward and fair. They didn't try to upsell me on a bunch of add ons like the last company that quoted me. Just did the ducts and the dryer vent and left."
- Devon Pratt"Bought an older home and the previous owners had pets everywhere. After Kestrel did the ducts the stale smell was just gone. On time, quick, and they showed me the filter they pulled."
- Preston Ngata"Thorough job and the price was exactly what they quoted. Took a little longer than they estimated, about an extra hour, but they didn't rush and they cleaned up after. No dust left on the floor."
- Nina Castellano