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 Lewisville
Duct repair and sealing in Lewisville, TX typically costs $280-$780 for most residential jobs, with flex-duct reattachment and mastic sealing running at the lower end and full run replacement or metal duct fabrication at the higher end. Most Lewisville homeowners who call us have a specific problem: a room that won’t hold temperature, a spike in the electric bill, or a musty smell every time the system cycles. We dispatch crews from our Dallas-Fort Worth office and serve Lewisville neighborhoods including Old Town, Vista Ridge, and the lakeside corridors near Lake Lewisville with same-week scheduling.
Our Duct Repair & Sealing team has worked inside hundreds of Lewisville attics. We know what the original 1980s flex-duct systems look like after four decades of North Texas heat expansion and lake-influenced humidity. Call (682) 297-4068 for a written estimate before any work begins.
Why CleanRun Air Duct Cleaning Irving Is Lewisville’s Preferred Duct Repair & Sealing Company
We’ve served Lewisville since adding the city to our route structure in 2013, and the pattern is consistent: homes built during the 1978-1995 buildout have ductwork that was never designed to last this long. Our customers in Lewisville come back because we show them what we found. Every job ends with a Documented Photo Record of every duct run, delivered as a standard deliverable, not an upsell.
Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise applies to every Lewisville job in writing, not as a verbal assurance that disappears with the crew. We also offer a Free Second Opinion on any written estimate from a competitor; bring us the quote and we’ll put our number next to it.
Calls are answered by a live person, 24/7. Scheduling is coordinated from our Dallas-Fort Worth office with Lewisville-specific routing.
Our Duct Repair & Sealing Services in Lewisville
Duct Sealing
Sealing is often the most cost-effective repair we perform in Lewisville. The original 1980s flex-duct systems in neighborhoods like Vista Ridge and the Old Town historic district were joined with tape that degrades after 15-20 years in attic conditions. We remove failed tape, clean the collar surfaces, and apply mastic sealant - a fiber-reinforced compound that remains flexible through thermal cycles - to every joint, plenum connection, and register boot. A typical duct sealing job in Lewisville runs $280-$450 for a single-system home, with the written price delivered before any panel comes off.
Flex Duct Repair
Flex duct repair is our most frequent Lewisville service call. The fiberglass-lined flexible ducts installed in the 1980s and 1990s sag between supports, compress at low points from attic foot traffic during maintenance visits, and pull off collars after decades of expansion and contraction. In a 1984 tract home off Vista Ridge Drive, our tech found the supply duct run had partially pulled off the plenum collar in the attic, a failure mode we routinely see after decades of thermal expansion on 140°F July afternoons. We reattached the run, sealed every joint with mastic, and used a camera inspection to confirm no other disconnects, restoring supply-and-return balance and stopping raw attic air from entering the living space. Flex duct repair in Lewisville typically runs $320-$580 depending on accessibility and the number of compromised runs.
Metal Duct Repair
Older Lewisville homes with galvanized steel ductwork - more common in pre-1980 construction near Main Street and the original town grid - develop seam separation and rust-through where condensation collects. We fabricate replacement sections on-site, seal with mastic, and insulate to prevent future condensation. Metal duct repair in Lewisville runs $450-$780, with full section replacement at the higher end.
Duct Insulation
Insulation degradation is accelerated in Lewisville’s climate. Attics that exceed 140°F in summer cook the outer vapor barrier on flex-duct insulation, while lake-influenced humidity in lakeside neighborhoods keeps the material damp enough to support mold growth on the fiberglass surface. We replace compromised insulation with new R-6 or R-8 wrap, sealed at every seam, to restore thermal efficiency and prevent condensation. Duct insulation work in Lewisville typically runs $380-$650.
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 Lewisville
Our equipment roster includes Nikro negative-pressure extraction systems, Honeywell media filters and zone dampers, and Aprilaire whole-home dehumidification components - brands customers can verify independently. We stock common flex-duct diameters, mastic compounds, and collar fittings for Lewisville’s predominant system types, which means most repairs don’t wait on parts. For homes with Abatement Technologies HEPA filtration or Guardsman UV sanitizing components, we carry service parts and can integrate repair work with existing air-quality infrastructure.
Common Duct Repair & Sealing Problems We See in Lewisville Homes
- Plenum collar disconnections in 1980s subdivisions. Technicians working Lewisville’s 1980s subdivisions routinely find attic flex-duct runs that have partially pulled off the plenum collar - a failure mode driven by decades of thermal expansion on attics that regularly exceed 140°F in July and August - meaning the system has been drawing raw attic air directly into living spaces, often without the homeowner realizing the supply side was compromised.
- Mold colonization on fiberglass duct liner in lakeside neighborhoods. Because Lewisville sits on Lake Lewisville, ambient humidity runs well above inland DFW suburbs like Carrollton or Farmers Branch, so the original 1980s flex ducts in subdivisions like Old Town and Vista Ridge are far more prone to mold colonization than the same ducts a few miles east. The moisture source combines with trapped pollen and dust to accelerate biological growth.
- Compression damage from attic foot traffic. Flex duct runs in 1980s Lewisville homes sag and separate at joints after 30-45 years of attic heat expansion, and compression from attic foot traffic crushes low spots in flex runs, creating lint pathways that choke airflow and force the blower motor to work harder. We find this most often in homes with HVAC equipment positioned at the far end of the attic, requiring technicians to crawl over ductwork to reach it.
- Failed tape seals at register boots. The original cloth-backed tape used to seal register boots in Lewisville’s 1980s and 1990s construction turns to powder after 25 years in attic heat. We find supply boots leaking conditioned air into wall cavities and return boots pulling in unconditioned air from the same spaces, both of which show up as rooms that never reach set temperature.
Pricing for Duct Repair & Sealing in Lewisville, TX
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts, every time. A typical duct sealing job in Lewisville runs $280-$450. Flex duct repair, including reattachment, mastic sealing, and camera verification, typically runs $320-$580. Metal duct repair or fabrication work runs $450-$780. Duct insulation replacement runs $380-$650. Full system replacement for homes with multiple failed runs can exceed $1,200, and we quote those in writing with line-item breakdowns.
What moves a job toward the higher end: attic accessibility (steep pitch, limited hatch size, blown-in insulation depth), number of compromised runs, and whether the plenum itself needs resealing or replacement. What doesn’t affect price: the neighborhood. We don’t charge more for lakeside homes.
Every estimate is free. The written price we deliver is the price you pay. Call (682) 297-4068 to schedule.
We Also Serve Cities Near Lewisville
Our crews work Lewisville and the surrounding corridor regularly, including Flower Mound to the west, Carrollton to the south, Grapevine to the southwest, and Southlake to the northwest. The same written-price protocol, Documented Photo Record, and 365-Day Done Right Promise apply in every city we serve.
Serving Lewisville, TX - Our Local Coverage Area
We’re based in the Lewisville 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 Lewisville
The original flex-duct systems installed during Lewisville’s primary residential buildout from the late 1970s through the mid-1990s are now 30-45 years old, exceeding their designed service life by a decade or more. The fiberglass-lined flex runs, joined with tape that degrades in attic heat and supported by straps that sag over time, have undergone thousands of thermal expansion cycles in attics that regularly hit 140°F. Newer homes use thicker insulation, better mastic sealing at construction, and often rigid ductboard or metal trunk lines that hold up longer. Call (682) 297-4068 and we’ll inspect your system with a camera to show you exactly what condition it’s in.
Lake Lewisville raises ambient humidity in lakeside and near-lake neighborhoods well above levels found in more inland DFW suburbs like Carrollton or Farmers Branch. That persistent moisture infiltrates the flex-duct systems common in Lewisville’s large stock of 1980s-era tract homes, making biological growth inside ductwork a faster and more frequent problem here than in drier inland communities. We find mold and mildew on fiberglass duct liner in lakeside homes at roughly twice the rate we see it in comparable-age homes east of I-35E. The repair protocol is the same - removal or encapsulation of biological growth, repair of compromised runs, and mastic sealing - but the inspection interval should be shorter for lake-adjacent properties.
We start with a camera inspection of every accessible run to document current condition, then deliver a written scope and price before any work begins. For a typical sealing job, we remove failed tape, clean collar surfaces, apply fiber-reinforced mastic sealant to every joint and boot connection, and verify with pressure testing or camera re-inspection. For flex duct repair, we reattach disconnected runs, replace crushed or torn sections, add support straps to prevent future sagging, and seal every new joint. Every job concludes with a Documented Photo Record of every run, before and after, delivered to you as part of the standard job record. Call (682) 297-4068 for a written estimate.
Yes. Flex duct systems are actually the most common type we seal in Lewisville, and they’re often the ones that need it most. The flexible duct material itself doesn’t leak, but the collar connections at the plenum, the wye fittings, and the register boots are all sealed with tape that fails over time. We access each joint, remove degraded material, and apply mastic sealant that remains flexible through thermal cycles. The key difference from metal duct sealing is that we also inspect the flex runs for sagging, compression, and support failure while we’re in the attic. Most flex-duct sealing jobs in Lewisville run $280-$450.
The signs are specific: a room that won’t reach set temperature despite adequate supply airflow at the register, a sudden spike in electric bills without a rate change, dust accumulation that returns quickly after cleaning, or a musty or chemical smell when the system first cycles on. The definitive check is a camera inspection of the attic runs, which we perform as part of every estimate. In Lewisville’s 1980s subdivisions, we find supply ducts pulled off plenum collars in roughly one of every four homes we inspect - the homeowner often had no idea the system was drawing 140°F attic air mixed with insulation fibers and rodent debris directly into the living space. Call (682) 297-4068 and we’ll show you what your attic runs look like from the inside.
Ready to see what’s actually happening inside your ductwork? Call CleanRun Air Duct Cleaning Irving at (682) 297-4068 for a free, written estimate. Every job starts with a documented camera inspection, includes a written price before any work begins, and ends with a photo record of every duct run - plus the 365-Day Done Right Promise in writing. Haven Standard Clause 1: no exceptions, no surprises.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Irving, serving Lewisville and the Dallas-Fort Worth metro since 2013.