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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After
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After
Before
AfterFast, Reliable Duct Repair & Sealing Across Leander
Duct repair and sealing in Leander typically runs $280-$650 for most residential jobs, with full-system mastic sealing and flex duct repair completed in a single visit. Our crews serve Leander from our Austin coordination office, carrying Rotobrush agitation tools, Nikro HEPA-negative pressure systems, and Honeywell-manufactured sealing supplies on every truck. We answer calls at (737) 243-9544 live, 24/7, and schedule Leander appointments with a written price delivered before any panel comes off.
Leander’s explosive growth after 2005 built tens of thousands of homes fast. Crystal Falls, Bryson, Travisso - these neighborhoods went from caliche prairie to finished subdivision in months, not years. That speed left construction debris inside ductwork that homeowners never knew to address. We’re the crew that finds it, documents it, and fixes it.
Why CleanRun Air Duct Cleaning Austin Is Leander’s Preferred Duct Repair & Sealing Company
Since 2013, we’ve served 52,000+ homes with one rule: written price first, photo record last. No exceptions. Leander homeowners find us because someone they trust searched past the $79 coupon ads and found a company that names real dollars and shows real evidence.
Our Duct Repair & Sealing team knows Leander’s housing stock intimately. Slab-on-grade construction with attic-run flex duct. Open-plan layouts pushing 3-5 tons of air through runs that sag under blown insulation. Supply boots that separate from collars because the original builder used tape instead of mastic. We’ve photographed these failures in hundreds of Leander homes. The photo record goes to the homeowner every time.
Haven Standard Clause 1: Written Price Before Work Starts. Haven Standard Clause 3: Verified Crews - background-checked, uniformed, identified by name before arrival. Tomas Reyes, who leads CleanRun, established these clauses in 2013 and enforces them on every Leander dispatch.
Our 365-Day Done Right Promise applies in Leander exactly as it does everywhere we work. If the seal fails, if the repair doesn’t hold, if the airflow doesn’t improve - we make it right, in writing, without manager runaround.
Our Duct Repair & Sealing Services in Leander
Duct Sealing with Mastic Sealant
Leander’s continuous AC season, April through October, flexes and fatigues duct connections that were never properly sealed at build. We remove failed tape, apply mastic sealant (a fiber-reinforced paste that cures to a permanent, flexible bond), and verify with pressure testing. A typical mastic sealing job for a Leander slab-on-grade home runs $280-$420 for accessible attic runs. We photograph every sealed joint before closing the access panel.
Flex Duct Repair
Flex duct dominates Leander’s post-2005 construction, and it fails predictably. Kinks where the run hangs over a truss. Sagging where blown insulation shifts weight. Disconnections at the plenum (the main distribution box) where vibration works the collar loose. Our crew cuts out damaged sections, installs new inner liner and insulation with mechanical fasteners, and seals with mastic, not tape. Flex duct repair in Leander typically costs $180-$340 per run, depending on attic accessibility.
Metal Duct Repair
Some Leander homes, particularly earlier builds near Old Town and along Bagdad Road, use galvanized metal trunk lines. We repair separated seams, patch corrosion, and seal with mastic or specialized metal tape rated for HVAC use. Metal duct repair runs $220-$480 in Leander, with larger trunk-line work at the higher end.
Duct Insulation Replacement
Attic temperatures in Leander exceed 140°F in July. Compromised insulation on flex duct forces your system to cool the attic before it cools your rooms. We replace degraded insulation with R-8 rated flex duct or wrap existing metal with fiberglass insulation and vapor barrier. Insulation work in Leander ranges $260-$520 for typical residential systems.
Air Leak Repair
Pressure testing reveals what eyes cannot. We seal the system, pressurize with a calibrated fan, and measure leakage at the air handler, plenum, and each branch connection. Leak repair combines mastic sealing, mechanical fastening, and section replacement as needed. Most Leander homes test at 15-25% leakage before repair, under 5% after. Air leak detection and repair runs $340-$650 depending on system size and accessibility.
What happens when you call
- 1
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 trucks carry professional-grade equipment from Abatement Technologies, Honeywell, and Aprilaire - brands any Leander homeowner can research independently. We don’t claim these tools perform miracles. We claim they’re the standard in the trade, and we maintain them to manufacturer specification. Parts for common Leander systems are stocked locally, so repairs that require replacement components don’t wait on shipping. The equipment roster is documented on every job record, alongside the photo evidence of what we found and what we did.
Common Duct Repair & Sealing Problems We See in Leander Homes
- Missing mastic seals at supply boots. New-build flex duct connections in Crystal Falls, Bryson, and Travisso often relied on foil tape that degrades under Leander’s relentless AC cycling. The tape dries, cracks, and separates, allowing caliche dust from active construction corridors to enter the system. We find this in homes under 10 years old regularly.
- Disconnected or kinked flex runs. Attic-run flex duct in slab-on-grade tract homes sags where insulation shifts, or pulls apart at the air handler plenum. The homeowner notices uneven cooling - one bedroom hot, another cold - and assumes the AC is undersized. Usually it’s a disconnected run dumping conditioned air into the attic.
- Construction debris clogging supply boots. Because Leander’s master-planned subdivisions were built rapidly after 2005, many 3-5-ton attic-run flex duct systems still carry original drywall compound dust and blown-fiberglass fragments. This material packs at the first elbow or supply boot, forcing the blower motor to work harder and shortening its lifespan. A problem nearly unknown in Austin’s older central neighborhoods where ductwork has been repeatedly serviced.
- Failed insulation from attic heat load. Leander attics cook duct insulation from May through September. Once the vapor barrier cracks, moisture wicks into the fiberglass, adding weight that pulls the flex duct out of shape and reduces R-value. The system runs longer, costs more, and still can’t hold setpoint.
In a Bryson home built in 2016, our tech pulled a supply boot from the master bedroom and found it packed with drywall compound dust and blown fiberglass from the original build. The homeowner had never scheduled duct cleaning because they assumed new construction meant clean ducts. We used agitation tools and negative pressure with HEPA filtration to remove the debris, then sealed the boot collar with mastic to stop caliche dust from re-entering before we reassembled the register.
Pricing for Duct Repair & Sealing in Leander, TX
| Service | Typical Range in Leander |
|---|---|
| Mastic sealing (accessible attic runs) | $280-$420 |
| Flex duct repair (per run) | $180-$340 |
| Metal duct repair | $220-$480 |
| Duct insulation replacement | $260-$520 |
| Air leak detection & repair | $340-$650 |
| Full system seal + repair package | $580-$1,200 |
These ranges reflect Leander’s market: newer construction with accessible attics, standard 3-5-ton residential systems, and typical single-story or two-story slab-on-grade layouts. Two-story homes with zone dampers, or homes with restricted attic access, may run higher. Every job starts with a written price before work begins - Haven Standard Clause 1 - and includes the Documented Photo Record as standard. No per-vent pricing. No teaser coupons that balloon once the truck arrives.
Bring a competitor’s written estimate. We’ll deliver a free second opinion, our number next to theirs, both in writing.
We Also Serve Cities Near Leander
Our crews work Leander and the surrounding corridor regularly: Cedar Park to the south, Round Rock and Pflugerville to the east, Hutto further along the 130 toll. Dispatch and scheduling are coordinated from our Austin office, but the trucks serving Leander carry the same equipment, the same documentation standards, and the same written pricing policy. Same crew, same photo record, same 365-Day Done Right Promise.
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 3-5 years for Leander homes near active caliche construction corridors, and every 5-7 years for homes in established phases of Crystal Falls, Bryson, or Travisso. The fine limestone dust stirred by ongoing development loads filters and duct surfaces faster than in finished neighborhoods. If your home is downwind of an active build site, inspect supply registers annually for dust accumulation. Call (737) 243-9544 for a free estimate - we’ll photograph the inside of your first run and show you exactly what’s there.
Yes, very possibly. Leander’s rapid construction timeline means many 2015-2020 homes were never properly cleaned after build. Drywall compound dust, blown insulation fragments, and caliche particulate from the surrounding development frequently remain in the system. We find this material packed in supply boots of 6-year-old homes regularly. The age of the house matters less than what the camera shows inside the duct. We deliver that photo before recommending any work.
We access the attic, remove failed tape at plenum and boot connections, apply fiber-reinforced mastic sealant, and pressure-test the system to verify leakage under 5%. For Leander’s typical slab-on-grade with attic-run flex duct, the job takes 3-4 hours and requires no interior demolition. Every sealed joint is photographed. The written price is delivered before we enter the attic. Call (737) 243-9544 for a specific quote - estimates are free.
Often yes, if the uneven cooling stems from duct problems rather than system sizing. Disconnected flex runs, kinked ductwork, or collapsed insulation create pressure loss that mimics an undersized unit. We pressure-test and inspect with a borescope camera to locate the failure before recommending repair. If the ductwork is intact and the issue is zoning or capacity, we’ll tell you that too - Haven Standard Clause 1 applies to honest assessment, not just pricing.
Ashe juniper pollen - mountain cedar - peaks December through February, exactly when Leander homes are sealed tight against cold. Pollen and moisture accumulate in ductwork where mastic seals have failed, creating microbial growth on the debris layer. The smell emerges when AC cycling resumes in April and forces air past the contaminated surface. Sealing the leaks that allowed moisture entry, then removing the debris with agitation and negative-pressure extraction, eliminates the source. Masking with sanitizer alone doesn’t work; the debris has to come out.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Leander since 2013.