Whole-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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AfterFast, Reliable Duct Repair & Sealing Across Leander
Most duct repair and sealing jobs in Leander run between $280 and $650 for a standard single-system home, with flex-duct repairs on the lower end and full trunk-line sealing with mastic on the higher end. We dispatch crews to Leander from our Austin coordination office, and we typically schedule within three to five business days - enough time to perform a full camera inspection and deliver a written price before any work begins. You can reach us at (737) 259-5752 to book a free estimate.
Our Duct Repair & Sealing team knows Leander’s housing stock intimately. We’ve worked in Crystal Falls, Travisso, Bryson, Larkspur, and the older ranch properties along Ronald Reagan Boulevard and 183A. The city sits where the Blackland Prairie meets the Ashe juniper belt, so December-February cedar pollen loads are among the densest in the continental U.S. - a fine, waxy allergen that slips past standard filters and sticks inside duct walls. That’s why we recommend a full source-removal cleaning and re-seal every 3-4 years for Leander properties, not the 5-7 year interval that works in Round Rock or Pflugerville. The combination of cedar pollen, caliche dust from unpaved ranch roads, and ongoing construction debris creates a uniquely aggressive environment for ductwork in this market.
Why CleanRun Air Duct Cleaning Round Rock Is Leander’s Preferred Duct Repair & Sealing Company
We’ve served Leander homeowners since 2013 with a single protocol: written price before work starts, documented photo record when we leave. Every job carries the 365-Day Done Right Promise in writing - not a policy subject to manager approval, but a signed guarantee under Haven Standard Clause 1. Our technicians are background-checked, uniformed, and identified by name before arrival, operating under Haven Standard Clause 3: Verified Crews.
Leander customers receive the same deliverable every visit: a photo record of every duct run, before and after, showing exactly what was found and what was changed. No vacuum noise without evidence. The camera doesn’t lie, and neither do we.
Scheduling runs through our Austin office, but crews live and work in the Leander area. They know the difference between a 2019 Perry Homes flex-duct install in Crystal Falls and a 2006 KB Home trunk-and-branch system in the older sections near Bagdad Road. That local knowledge means faster diagnosis and fewer return trips.
Our Duct Repair & Sealing Services in Leander
Duct Sealing
Leander’s production-built homes from the 2005-2023 surge were assembled fast. We’ve found separated collar joints, missing end caps, and tape that failed before the first homeowner moved in. Our duct sealing service uses Guardsman mastic and professional-grade tape to close every leak point, then tests with a duct blaster or smoke pencil to verify. In Leander’s cedar pollen environment, an unsealed return duct pulls allergen-laden attic air directly into your living space. We seal it at the source.
Flex Duct Repair
Flex duct is the default in Leander’s newer subdivisions - Bryson, Larkspur, Travisso - and it’s vulnerable. The plastic liner degrades faster when coated with cedar pollen’s waxy residue, and the fiberglass insulation compresses where ducts sag in hot attics. We replace crushed or torn flex runs with new R-8 insulated duct, re-secure with tension straps every four feet, and seal all connections with mastic. In Bryson, our techs pulled blue painter’s tape scraps and hardened drywall mud out of a flex-duct boot during a camera inspection, then found the boot collar separated from the trunk line - a classic 2018-era production-build shortcut. We re-secured the collar with Guardsman mastic, re-taped the flex run, and sealed the remaining joints with mastic so the system stopped pulling caliche dust from the surrounding construction zone into the supply and return ducts.
Metal Duct Repair
Older Leander homes and some custom builds use galvanized sheet-metal trunk lines. These develop seam separations, rust at condensate points, and whistle at loose joints. We repair with slip joints and drive cleats, seal with mastic, and add mechanical fasteners where the original builder relied on tape alone. Metal systems in Leander’s rural properties often show creosote staining from wood-burning stoves - a residue that accelerates corrosion and requires more aggressive cleaning before sealing.
Duct Insulation
Uninsulated or degraded ductwork in Leander attics loses 20-30% of conditioned air before it reaches the register. We install foil-faced fiberglass insulation or closed-cell foam wrap on exposed metal and flex runs, with particular attention to plenum connections - the large central box where air enters the duct system - where temperature differentials are greatest. In Leander’s triple-digit summers, proper insulation reduces the load on your compressor and keeps second-story rooms from becoming uninhabitable by August.
Mastic Sealant Application
We specify mastic, not tape alone, for all permanent sealing in Leander. Tape fails; mastic doesn’t. We apply Guardsman-brand water-based duct mastic with a brush or caulking gun, building to a 1/16-inch thickness at all joints, seams, and collar connections. For cedar pollen-coated ducts, we clean first - mastic won’t bond to waxy residue. The result is a sealed system that holds against Leander’s aggressive particulate load.
Air Leak Repair
Leak detection comes before repair. We pressurize the system and use smoke pencils or infrared cameras to find the gaps. Common leak sites in Leander homes: filter rack gaps, plenum seams, register boot connections, and the junction between house ductwork and detached outbuilding systems. Each leak gets documented, priced, and sealed with the appropriate method.
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.
BeforeAfterTrusted Brands We Service in Leander
Our equipment roster includes Rotobrush mechanical agitation systems, Nikro HEPA-filtered negative-pressure extractors, and Honeywell and Aprilaire air quality components. We stock Guardsman mastic and professional-grade tapes locally, so Leander jobs don’t wait on parts. You can verify every brand independently - we name them because we have nothing to hide. The tools match the protocol: documented, traceable, and built for residential ductwork, not improvised from hardware-store stock.
Common Duct Repair & Sealing Problems We See in Leander Homes
- Cedar pollen and caliche dust binding to sealant edges. The waxy Ashe juniper pollen that blankets Leander from December through February coats mastic and tape, causing sealant to peel and leak within a few seasons. We see this most in homes within two miles of the cedar line, near the Travisso and Crystal Falls elevations.
- Construction debris in newer flex-duct systems. Leander’s 2005-2023 building surge left drywall compound dust, blown insulation fragments, and blue painter’s tape inside duct boots. The debris restricts airflow and provides a substrate for pollen and dust to accumulate faster than in clean systems.
- Creosote residue from wood-burning stoves on rural properties. Homes on unpaved ranch roads around Leander often use wood heat. The creosote-rich smoke enters return ducts, glues dust to duct walls, and erodes flex-duct liners faster than standard HVAC-only cycling. These systems need more frequent inspection and earlier re-sealing.
- Unsealed junctions at detached outbuilding duct runs. Rural Leander properties with shop buildings, guest houses, or detached garages often run a separate trunk line to the outbuilding. The junction at the house trunk is frequently unsealed, creating a hidden leak that shows up as dust streaks at the main house registers. The air handler runs at higher static pressure to push air those longer distances, exaggerating every leak.
Pricing for Duct Repair & Sealing in Leander, TX
Here’s what duct repair and sealing costs in the Leander market, based on jobs we’ve completed under Haven Standard Clause 1:
| Service | Typical Range |
|---|---|
| Single flex-duct run repair/replacement | $180 - $320 |
| Register boot re-sealing (per boot) | $85 - $140 |
| Full duct sealing with mastic (single system, average home) | $450 - $850 |
| Plenum repair or replacement | $280 - $550 |
| Detached outbuilding trunk-line sealing | $320 - $600 |
| Duct insulation wrap (per linear foot) | $6 - $12 |
Factors that move the price: accessibility of attic or crawl space, extent of construction debris requiring pre-cleaning, number of separated joints found during inspection, and whether the system has been previously sealed with failing tape that must be removed. We deliver a written price before any work begins - always, on every job, before a single panel comes off. No per-vent pricing, no teaser coupons, no invoice inflation once the truck is in your driveway. Call (737) 259-5752 for a free estimate; we’ll inspect, photograph, and price on the spot.
We Also Serve Cities Near Leander
Our crews work Leander regularly and also serve Cedar Park, Georgetown, Round Rock, and Pflugerville. Each city gets the same protocol - written price, documented photo record, 365-Day Done Right Promise - but the recommended service interval varies based on local conditions. Leander’s cedar pollen and caliche dust environment demands more frequent attention than the flatter, less pollen-exposed eastern suburbs.
Serving Leander, TX - Our Local Coverage Area
We’re based in the Leander area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Duct Repair & Sealing in Leander
Every 3-4 years for rural Leander properties, not the 5-7 year interval that suffices in Round Rock or Pflugerville. The combination of cedar pollen’s waxy residue, caliche dust from unpaved ranch roads, and wood-burning stove creosote creates a uniquely aggressive environment that degrades seals and coats duct interiors faster than standard suburban conditions. Call (737) 259-5752 to schedule an inspection and we’ll photograph the current state of your system.
Because Leander’s production builders installed ductwork on compressed timelines during the 2018-2023 surge, and we’ve found blue painter’s tape, drywall mud, and separated boot collars in Bryson homes that are four to six years old. The ductwork was functional at closing, not optimized for longevity. A camera inspection reveals whether your system was sealed properly or merely taped enough to pass inspection. We’ll show you the photos before discussing any work.
Yes. Detached outbuilding systems in rural Leander run at higher static pressure and connect to the main house trunk through a junction that’s often unsealed. That hidden leak pressurizes your attic or crawl space and pulls dust into the main house registers. We inspect and pressure-test outbuilding junctions as a separate line item, documented with its own before-and-after photo record.
Cedar pollen is microscopic, waxy, and adhesive - it slips past standard filters, sticks to duct walls, and prevents mastic from bonding properly to joints. Standard household dust is inert by comparison. In Leander’s December-February cedar season, pollen loads can exceed 20,000 grains per cubic meter, coating duct interiors in a film that accelerates sealant failure and requires thorough pre-cleaning before any sealing work. We account for this in our Leander protocol.
We use Guardsman water-based duct mastic for all permanent sealing, applied to a 1/16-inch thickness. Our cleaning and inspection equipment includes Rotobrush mechanical agitation systems and Nikro HEPA-filtered negative-pressure extractors. For air quality components, we install Honeywell and Aprilaire products where appropriate. Every brand is named so you can verify specifications independently before approving the written price.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Leander since 2013.