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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AfterTrusted Duct Repair & Sealing for Leander Homeowners
If you’re wondering how much Duct Repair & Sealing costs, prices in Leander typically run $180-$850 depending on whether you’re sealing accessible joints or replacing collapsed flex runs, and most jobs are completed in a single visit with a written price agreed before any work starts. CleanRun has documented the inside of over 52,000 duct systems since 2013, and in Leander’s newer construction zones like Travisso and Crystal Falls, we regularly find flex duct that has pulled loose from plenum connections or metal seams that have opened from thermal cycling through Central Texas temperature swings. We’re independently owned and operated under the Haven Standard, and every repair we make is backed by our 365-Day Done Right Promise in writing. Call (737) 252-1285 for a free estimate with a written price delivered before any panel comes off.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps, seams, and connection points where conditioned air escapes into your attic, crawl space, or wall cavities before it ever reaches your rooms. In Leander homes built during the 2015-2022 construction boom, we’ve found that up to 30% of airflow can be lost through poorly sealed plenum connections and register boots, particularly in two-story designs with long trunk lines running through unconditioned attic space. CleanRun seals with mastic compound and UL-181 rated tape, then verifies the seal with a pressure test so you have documented proof of the improvement, not just a technician’s word.
Flex Duct Repair
Flex duct, the insulated flexible tubing common in Leander’s suburban builds, collapses, tears, or pulls loose at its connections when kinked during installation or damaged by attic traffic. We replace damaged flex runs with new R-8 insulated duct sized to match your system’s CFM requirements, supported with proper straps every four feet to prevent sagging that creates airflow restrictions. Every flex repair we complete is photographed before and after, and the photo record is delivered as part of your standard job documentation.
Metal Duct Repair
Galvanized steel ductwork, found in older Leander homes and in commercial applications, develops seam separation, corrosion at joints, or punctures from mechanical damage. We repair metal duct with slip joints and drive cleats for structural integrity, then seal with mastic rated for metal substrates to prevent the thermal expansion and contraction that reopens seams during our 100-degree summer days. When metal duct is too deteriorated for repair, we document the condition with photos and provide a written replacement scope with exact pricing before any demolition begins.
Duct Insulation
Duct insulation prevents the temperature loss that happens when 55-degree conditioned air passes through a 140-degree Leander attic in August, or when heated air loses its warmth to a 40-degree attic in January. We install R-8 or R-6 fiberglass insulation with vapor barrier, secured with mechanical fasteners and sealed tape, to bring under-insulated ductwork up to current Texas energy code standards. Our crews photograph insulation coverage at every joint and elbow so you can verify complete installation rather than guessing what happened above the ceiling.
Mastic Sealant
Mastic is a water-based, fiber-reinforced compound that brush-applies into duct seams and cures to a flexible, permanent seal superior to foil tape alone in high-temperature attic environments. We apply mastic to every longitudinal seam, transverse joint, and register boot connection, then allow proper cure time before pressurizing the system for testing. Unlike tape that can dry and release, mastic maintains its seal through years of Leander’s thermal cycling, and we document application coverage in your photo record.
Air Leak Repair
Air leaks in ductwork are pressure-tested points of failure, from visible gaps at plenum connections to pinholes in deteriorated flex that only reveal themselves under system pressure. We locate leaks with a combination of visual inspection, smoke pencil testing, and digital manometer readings that quantify the pressure loss in inches of water column. Every leak we identify is marked, photographed, and repaired with the appropriate method for that location and material, with post-repair pressure testing to confirm the fix.
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.
Brands We Service for Duct Repair & Sealing
We’ve repaired and sealed ductwork connected to Honeywell zoning systems in Leander’s custom homes, where improperly balanced dampers had created pressure imbalances that split seams at the plenum. Our crews understand how Honeywell’s zone panels interact with duct static pressure, and we verify that repairs maintain the system’s designed airflow per zone rather than simply patching the visible damage. We’ve also worked extensively with Aprilaire whole-home dehumidifiers and fresh air ventilators, where duct sealing is critical to maintaining the precise airflow rates these units require for warranty compliance.
Rotobrush equipment is part of our standard service vehicle loadout, and we use their inspection cameras to document duct conditions before recommending any repair scope. Whether your Leander home has a Honeywell zone system, Aprilaire ventilation, or any other make of HVAC equipment connected to your ductwork, we can assess, repair, and seal with documentation that protects your existing warranties and improves system performance. Our home page lists our full service capabilities.
BeforeAfterSigns You Need Duct Repair & Sealing Right Now
- Rooms that never reach the thermostat setting. When a bedroom stays five degrees warmer than the hallway in July despite the AC running continuously, the duct run serving that room likely has a separated joint, collapsed flex, or significant leak. You’re paying to cool your attic instead of that room, and the compressor is running longer than designed.
- Dust accumulation immediately after professional cleaning. If you’ve had your ducts cleaned within the past year and dust is still coating registers within weeks, air is being pulled into the system through leaks in return ductwork running through unconditioned spaces. That dust is attic insulation, rodent debris, and construction particulate, not ordinary household dust.
- Energy bills that spike without rate changes or usage increases. A duct system leaking 20% of its air can increase cooling costs by 30% or more in a Leander summer, as the system runs longer to achieve the same result. Compare your kWh usage year-over-year; if consumption is up but rates are stable, duct leakage is a prime suspect.
- Whistling or rushing air sounds from walls or ceilings. These noises indicate high-velocity air escaping through gaps too large for normal system operation, often at plenum connections or where flex duct has pulled from register boots. The sound is the symptom; the energy waste and pressure imbalance are the problems.
- Uneven airflow from registers, with some blowing hard and others barely whispering. This pattern suggests either a collapsed flex run blocking flow to the weak registers, or a major leak in the trunk line diverting air before it reaches the branch ducts. Both conditions strain the blower motor and reduce equipment life.
Our Duct Repair & Sealing Process - Step by Step
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System assessment with written scope. We start with a visual inspection of accessible ductwork, register airflow measurement with an anemometer, and digital manometer testing of static pressure at the air handler. You’ll receive a written scope with exact pricing before any repair begins, per Haven Standard Clause 1. No exceptions.
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Photo documentation of existing conditions. Our technician photographs every duct run, plenum connection, and register boot from inside and outside the duct, using a Rotobrush inspection camera where access allows. These images become your “before” record, time-stamped and delivered with your final job documentation.
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Targeted repair and sealing. We execute only the work specified in your written scope: replacing damaged flex, resealing metal seams with mastic, reinforcing connections, or adding insulation as agreed. Every repair is photographed in progress so you can verify material quality and installation technique.
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Pressure testing and airflow verification. After repairs, we retest system static pressure and measure register airflow to confirm the improvement against your baseline numbers. The manometer doesn’t lie; you’ll see the before and after readings in your documentation.
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Deliverable package and warranty activation. You receive a complete photo record of every duct run, the written scope with final pricing, pressure test results, and your 365-Day Done Right Promise in writing. This package is your proof of work performed and your protection if anything needs attention in the next twelve months.
How Much Does Duct Repair & Sealing Cost in Leander?
A typical duct sealing job in Leander runs $180-$450 for accessible metal seams and register boots in a single-system home, while flex duct replacement for one collapsed run averages $280-$550 depending on attic accessibility and run length. Full-system sealing with mastic on all joints in a 2,500-square-foot home typically falls between $600-$850, and adding R-8 insulation to under-insulated trunk lines runs $400-$700 for most Leander layouts.
Several factors move these numbers. Attic temperature affects crew efficiency; a July repair in a 140-degree Leander attic takes longer than the same job in March. The number of duct runs and whether your home has a single system or zoned equipment changes material and labor scope. Accessibility matters too; truss-framed attics with limited crawl paths require more time than open rafter designs common in some Crystal Falls builds.
To avoid overpaying, reject any quote that won’t put the full scope and price in writing before work starts, and be skeptical of per-vent pricing that obscures the total. CleanRun’s Haven Standard Clause 1 requires a written price on every job; we also offer a Free Second Opinion on any competitor’s written estimate. Our pricing includes all materials, labor, photo documentation, and the 365-Day Done Right Promise with no add-on fees. Call (737) 252-1285 for a written estimate at no charge.
Duct Repair & Sealing Near Leander - Our Service Area
CleanRun serves Leander directly and the surrounding communities where many of our customers work or have family: Duct Repair & Sealing in Cedar Park, Duct Repair & Sealing in Brushy Creek, Jollyville, Lago Vista, Round Rock, Georgetown, Wells Branch, Lakeway, Pflugerville, Hutto, and Lost Creek. Most Leander appointments are scheduled within a few business days, and our technicians live in the area so they understand local construction patterns from the 1980s ranch homes near Old Town to the newer builds in Travisso and Bryson. We don’t charge travel fees within our standard service radius.
Serving Leander, TX - Our Local Coverage Area
We’re based in the Leander area and know this community well, and we also provide Duct Repair & Sealing - Georgetown. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Duct Repair & Sealing in Leander
Duct repair and sealing fixes the physical structure of your duct system, closing leaks and replacing damaged sections, while duct cleaning removes accumulated debris from inside intact ductwork. Cleaning cannot fix a separated joint or collapsed flex run; sealing cannot remove years of dust buildup. Many Leander homes need both, and we assess which applies to your situation during our free estimate.
Most single repairs, like replacing one collapsed flex run or sealing accessible register boots, are completed in two to four hours. Full-system sealing for a complete duct network typically takes a full day, with larger homes or complex attic layouts extending into a second day. We provide a time estimate in your written scope so you can plan accordingly.
Common repairs in Leander range from $180 for basic sealing of accessible joints to $850 for full-system mastic sealing with pressure testing, with flex duct replacement typically $280-$550 per run. The exact price depends on your home’s size, attic accessibility, and the condition we find during inspection. Call (737) 252-1285 for a free written estimate with exact pricing for your specific situation.
Yes. We regularly repair and seal ductwork connected to Honeywell zoning systems and Aprilaire ventilation equipment, and we carry the knowledge to protect your existing equipment warranties through proper repair technique. Our crews are trained on the static pressure and airflow requirements of these systems, and we document our work to support any future warranty claims you may need to file.
Most duct issues cause gradual efficiency loss and comfort problems rather than immediate safety hazards, so scheduling within a few days is typically appropriate. However, a completely detached return duct in an attic can pull in dangerous contaminants, and a collapsed flex run blocking airflow can cause coil freezing that damages your compressor. If your system has stopped cooling a zone entirely or you’re hearing unusual mechanical strain from the blower, call (737) 252-1285 and we’ll assess urgency during your call.
Every duct repair and sealing job is backed by CleanRun’s 365-Day Done Right Promise in writing: if the repair fails or the seal opens within twelve months, we return and make it right at no charge. This is a written guarantee delivered with your job documentation, not a policy subject to manager approval. Haven Standard Clause 2 requires this accountability on every job we perform.
Clear a three-foot path around your indoor air handler and ensure attic access is unobstructed by storage items. If you have pets, secure them in a separate room during the service. You don’t need to clean or move furniture covering registers; our crews work around normal household conditions. We’ll confirm any specific preparation needs when we schedule your appointment.
Schedule Your Duct Repair & Sealing Service in Leander Today
Call (737) 252-1285 to schedule your free estimate. You’ll speak with a live person, not a menu, and we’ll send a background-checked, uniformed technician who will provide a written price before any work begins. Every repair is photographed, documented, and backed by our 365-Day Done Right Promise. No coupons, no surprises, no call-for-a-quote runaround. Just documented work at an agreed price.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Leander, serving Leander, our Duct Repair & Sealing in Cedar Park, Brushy Creek, and surrounding communities since 2013.