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
Duct repair and sealing in Leander typically costs $280-$650 for most residential jobs, with flex duct replacement running $180-$340 per run and full-system mastic sealing averaging $450-$850 depending on duct count and attic access. Our crews are dispatched from our Austin office and serve Leander properties directly, carrying Rotobrush and Nikro equipment, mastic compounds, and flex duct inventory sized for the tract-home attic layouts common in Crystal Falls, Bryson, and Travisso. We’re familiar with the 140-150°F summer attic temperatures that degrade flex duct liner here, the caliche dust that infiltrates through every gap, and the Mountain Cedar pollen that finds its way past failed tape seals. Call (737) 252-1285 for a written estimate before any work begins.
Why CleanRun Air Duct Cleaning Leander Is Leander’s Preferred Duct Repair & Sealing Company
We’ve worked in Leander since 2013, and the photo records from those early jobs look almost identical to what we find today in newer construction: flex duct collars separating at the air handler, tape seals dried to brittle strips, and fine white caliche dust coating every surface. The difference now is that we’ve documented over 52,000 home visits, and a significant share of those have been in Williamson County’s fastest-growing corridors.
Our Duct Repair & Sealing in Leander customers receive the same deliverables on every visit: a written price before any panel comes off, a Documented Photo Record of every duct run before and after, and the 365-Day Done Right Promise backed in writing. Haven Standard Clause 1 requires that written price; no exceptions, no “call for a quote.”
Technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews. Tomas Reyes, our owner, reviews every complaint personally. The crew that arrives at your door is identified by name before they park.
We also offer a Free Second Opinion on any written estimate from another company. Bring us their number; we put ours next to it in writing.
Our Duct Repair & Sealing Services in Leander
Flex Duct Repair
Flex duct dominates Leander’s housing stock, and it fails predictably here. The attic-mounted air handlers in Crystal Falls, Bryson, and Travisso push air through flex runs that sit in 140-150°F ambient temperatures for four months straight. The liner cracks. The insulation compresses. The collars separate at wye fittings. We replace crushed or torn flex sections with new R-6 or R-8 insulated duct, reconnect with mechanical fasteners, and seal with mastic, not tape. In a 2022-built Bryson home, we found a separated collar and two crushed runs coated with caliche dust from the graded lot next door. Reconnection, replacement, and mastic sealing dropped supply and return leakage dramatically on post-repair testing.
Mastic Sealant Application
Builder-grade tape dries and peels in Leander’s attic heat within three to five years. We remove failed tape at plenum connections, register boots, and longitudinal seams, then apply water-based mastic sealant rated for the temperature swings these attics see. Mastic remains flexible, fills irregular gaps, and doesn’t rely on adhesive bonding to metal or flex duct jacket. For homes on or near unpaved roads in rural Leander, mastic sealing is especially critical: the negative pressure in return ducts pulls in fine dust through every leak, and mastic is the only sealant that accommodates the vibration and thermal expansion these systems experience.
Duct Insulation Replacement
When flex duct insulation breaks down in Leander’s attics, the thermal penalty is immediate. Your 55°F supply air gains ten to fifteen degrees before it reaches the register. We strip degraded insulation, replace with new R-8 flex duct or wrap rigid metal with fiberglass insulation and vapor barrier, and seal every penetration. This matters more in Leander than in most markets because the cooling load runs so long: every degree of attic gain is a degree your compressor works harder to remove, June through September.
Metal Duct Repair
Older Leander homes and some custom builds use galvanized metal trunk lines with flex branch takeoffs. We repair rusted or separated metal sections, replace failed dampers, and seal longitudinal seams with mastic and fiberglass mesh. Metal duct in Leander’s caliche dust environment shows a distinctive failure pattern: fine alkaline dust infiltrates through seam gaps, accelerates corrosion at condensation points, and builds up at low-velocity zones. Our camera inspection identifies these deposits before they become rust-through.
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 vans carry professional-grade equipment from Rotobrush, Nikro, Honeywell, and Aprilaire. We don’t use shop-vac adapters or consumer-grade tools. The Rotobrush systems we deploy for camera inspection and debris removal are the same units specified by commercial HVAC contractors. Honeywell and Aprilaire components, including media filters and zone dampers, are stocked for common Leander system configurations. This means replacement parts don’t require a second trip, and repairs are completed with components you can verify independently.
Common Duct Repair & Sealing Problems We See in Leander Homes
- Flex duct liner cracking at collars and wye fittings. The 140-150°F attic temperatures in Leander’s master-planned communities accelerate thermal degradation of the plastic liner, causing it to crack and separate at stress points. Once the liner fails, the insulation layer compresses and the duct loses both structural integrity and R-value.
- Failed tape seals at air handler connections. Builder-grade installs in Crystal Falls and Travisso often rely on foil tape or thin mastic that dries within three to five years. The air handler connection, with its constant vibration and thermal cycling, is typically the first failure point.
- Caliche dust infiltration through return leaks. Williamson County’s limestone caliche soil produces fine alkaline dust that becomes airborne with any disturbance. Leaky return ducts in homes near unpaved roads or active construction pull this dust directly into the system, coating blower wheels and heat exchangers.
- Crushed flex runs in tight attic framing. Production builders in Leander’s rapid-growth phases often routed flex duct through truss webs with insufficient clearance. The compressed duct restricts airflow, increases static pressure, and creates whistle points at registers.
Pricing for Duct Repair & Sealing in Leander, TX
Most residential duct repair and sealing jobs in Leander fall between $280 and $650. Here’s how typical work breaks down:
| Service | Typical Range in Leander |
|---|---|
| Single flex duct run replacement | $180 - $340 |
| Mastic sealant application, full system | $450 - $850 |
| Air handler collar reconnection + sealing | $220 - $380 |
| Duct insulation replacement (per run) | $160 - $290 |
| Outbuilding or workshop flex repair | $200 - $420 |
Factors that move the number: attic accessibility (truss height, decking presence), duct count and configuration, extent of contamination requiring pre-sealing cleaning, and whether the system needs post-repair leakage testing. We deliver a written price before any work starts, every time, under Haven Standard Clause 1. Estimates are free. Call (737) 252-1285 for an exact quote on your system.
We Also Serve Cities Near Leander
Our Duct Repair & Sealing crews work throughout Williamson and northern Travis counties, including Cedar Park, Georgetown, Round Rock, and Pflugerville. Each market sees similar housing stock and climate stress, but Leander’s rapid production-build cycle and rural outbuilding density create repair patterns we don’t see elsewhere.
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 two to three years for inspection, with cleaning every three to five years depending on dust loading. The caliche dust from Williamson County’s unpaved roads infiltrates return systems continuously, and the fine particulate accelerates wear at flex duct collars. Homes with outbuilding HVAC or workshop systems should add an annual visual check of those long, unconditioned flex runs. Call (737) 252-1285 to schedule an inspection with written findings.
Yes, indirectly but significantly. Caliche dust is alkaline and abrasive. It accumulates at low-velocity zones in flex duct, adds weight that stresses hanging straps, and infiltrates through failed tape seals to coat the blower and heat exchanger. The dust itself doesn’t cut the liner, but the contamination layer it creates attracts moisture, promotes microbial growth, and obscures liner cracks during visual inspection. We document caliche loading in our photo records so you can see the difference between a clean repair and a masked one.
Because Leander’s production builders installed flex duct before drywall was finished and often left vents unsealed during construction. In active-phase subdivisions like Bryson, 2-3 year old homes routinely show flex duct runs already coated with white caliche dust blown in from graded lots, plus construction debris left from the original build. New-home duct repair here means addressing both a fresh leak and a pre-existing contamination layer that older neighborhoods never had. The 2022 Bryson home we repaired had a separated collar, two crushed runs, and caliche dust throughout, all before the third anniversary of construction.
Yes. Rural Leander properties often run long, unconditioned flex duct to outbuildings, barn offices, and workshops. These systems collect unpaved-road dust, experience wider temperature swings than house-attic runs, and are frequently overlooked during standard home service visits. We repair and seal these with the same mastic-sealed, mechanically fastened approach we use in main residences, and we include them in our photo record. The written price covers the full scope before work begins.
Leander sits in the Ashe juniper belt where December-February Mountain Cedar pollen counts rank among the highest in North America. Leaky return ducts pull this dense biological load directly into the HVAC system, bypassing the filter entirely. Sealed ducts don’t eliminate pollen, but they force it through the filter media rather than around it. For Leander homeowners with cedar fever, duct sealing is often the most cost-effective intervention after filter upgrades. We see the correlation directly: post-sealing leakage tests in January frequently show reduced particulate loading at the blower, even with the same filter in place.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Leander since 2013.