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 typically runs $280-$650 for most residential jobs, with full-system sealing in larger homes reaching $800-$1,400. Our crews are dispatched from the Dallas-Fort Worth office and carry the full equipment roster needed to handle both the 1980s flex-duct stock near Lake Lewisville and the new construction going up along the city’s expanding western edge. Call (940) 290-8552 and a live person will answer, 24/7, to schedule a free written estimate.
We’ve worked in Lewisville since 2013, and the pattern is consistent: the repair scope on any given street depends almost entirely on when that subdivision was built. Valley Ridge and Timber Creek, built during the late-1980s boom, carry original fiberglass duct board and early flex duct now shedding liner material. Meanwhile, homes off Fox Avenue and in newer corridors often need sealing against construction debris the builder never cleared. Our Duct Repair & Sealing team treats these as fundamentally different jobs, because they are.
Why CleanRun Air Duct Cleaning Frisco Is Lewisville’s Preferred Duct Repair & Sealing Company
CleanRun has served more than 52,000 homes since 2013, every one with a written price before work started and a documented photo record when the crew left. In Lewisville specifically, we’ve built our reputation on matching the repair method to the housing stock - not running the same protocol regardless of what the walls contain.
Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. The equipment we bring includes Rotobrush agitation systems, Nikro negative-pressure extractors, and sealing products from Honeywell and Aprilaire - brands customers can verify independently before agreeing to a price.
Every job carries the 365-Day Done Right Promise in writing: if the work is not right, we make it right. No manager approval required. We also offer a Free Second Opinion on any written estimate from a competitor - bring us the number, and we’ll put ours next to it in writing.
Scheduling is coordinated from our Dallas-Fort Worth office, with crews serving Lewisville neighborhoods directly. Calls are answered by a live person, not a queue system.
Our Duct Repair & Sealing Services in Lewisville
Duct Sealing
Leaky ductwork in Lewisville homes wastes an average of 20-30% of conditioned air, according to Department of Energy estimates we’ve field-verified locally. In lakeside-adjacent neighborhoods like Castle Hills, elevated humidity keeps mastic joints damp and prone to premature failure, so supply and return ducts pull unconditioned attic air back into the system. Our sealing protocol starts with a pressure-pan test to locate leaks, then applies fresh mastic or mechanical sealant depending on the duct material and access point. A typical duct sealing job in Lewisville runs $350-$650 for a single-system home.
Flex Duct Repair
The flex duct installed in 1980s and 1990s Lewisville tracts - Valley Ridge, Timber Creek, and similar vintage neighborhoods off Fox Avenue - was early-generation product with thinner mylar jackets and wire helixes that corrode in attics reaching 140°F in July. We replace collapsed or torn runs with modern, insulated flex duct rated for North Texas temperature swings, and we photograph every connection before and after. Flex duct repair in Lewisville typically costs $180-$340 per run, with most homes needing 2-4 runs addressed.
Metal Duct Repair
Where Lewisville homes have galvanized steel trunk lines - more common in custom builds and some 1990s two-story plans - we see seam separation and rust-through at the plenum connection. Metal repair involves cutting out damaged sections, fabricating replacement pieces on-site, and sealing with high-temperature mastic. These jobs run $400-$800 depending on trunk length and access difficulty. We document the interior condition with camera inspection before quoting.
Duct Insulation
Missing or degraded insulation on attic ductwork is a major efficiency loss in Lewisville, where attic temperatures exceed outdoor ambient by 30-40°F for five months annually. We install closed-cell insulation wraps or replacement insulated flex, depending on the existing system configuration. Insulation work in Lewisville ranges from $280 for partial rewrap to $1,200 for full system recovery in larger homes.
Mastic Sealant Application
Mastic is the standard for sealing duct joints in Lewisville, but application quality varies enormously. Builders often leave plenum joints and register boots unsealed, especially in new construction where the HVAC subcontractor’s punch list never included duct integrity. We apply UL-181-rated mastic with a minimum 1/8-inch thickness at all joints, then verify with a smoke pencil or pressure test. Mastic sealing as a standalone service runs $280-$520.
Air Leak Repair
Air leaks in Lewisville ductwork fall into two categories: leakage to outside (attic, crawl space, garage) and leakage to inside (between supply and return, causing pressure imbalance). We locate both with a duct blaster test, then prioritize repairs by leakage magnitude. The 1980s duct board in older Lewisville neighborhoods is particularly susceptible to leakage at the corners and access panels, where the fiberglass structure has degraded. Air leak repair typically falls in the $320-$680 range.
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
CleanRun stocks parts and sealing materials from Honeywell, Aprilaire, and Abatement Technologies - brands whose specifications are published and verifiable. For Lewisville customers, this means no waiting on special orders for common repair components. Our crews carry Honeywell zone dampers and Aprilaire media air cleaners on the truck, and we use Abatement Technologies HEPA filtration during any job that involves disturbing aged duct liner. If your system includes Guardsman UV sanitizing components, we can assess and service those as well. The parts are on the truck, the prices are in writing before we start, and the photo record shows what was actually done.
Common Duct Repair & Sealing Problems We See in Lewisville Homes
- Construction debris in new-build ducts. Homes off Fox Avenue and in newer Lewisville corridors regularly hand over with drywall sanding dust, sawdust, and insulation chunks packed into flex runs. The builder’s HVAC subcontractor never flushed the system, and the first cooling cycle pulls it all into the air handler. We set up negative-pressure extraction with HEPA filtration and seal the plenum joints the builder left open.
- Fiberglass duct board shedding in 1980s-90s tracts. Original duct board in Valley Ridge, Timber Creek, and similar neighborhoods has reached end of service life. The interior liner degrades into a fibrous mat that cakes the blower motor and degrades any MERV-rated filter’s performance within weeks. Source removal and duct replacement is the only durable fix.
- Premature mastic failure in lakeside neighborhoods. Castle Hills and other Lake Lewisville-adjacent areas experience measurably higher ambient humidity than inland DFW suburbs. That moisture keeps mastic joints damp, accelerating biological growth and letting attic air infiltrate the duct system even after a fresh cleaning. We use moisture-resistant sealant formulations and verify with post-repair pressure testing.
- Unsealed register boots in tract construction. Whether 1989 or 2023, Lewisville builders routinely leave the connection between duct run and floor/wall register unsealed. It’s a 50-cent fix that saves 10-15% on annual HVAC operating cost, yet it rarely appears on the builder’s punch list.
Pricing for Duct Repair & Sealing in Lewisville, TX
Honest pricing means naming the range before anyone asks. In Lewisville’s market, here’s what we see:
| Service | Typical Range |
|---|---|
| Single duct run repair/replacement (flex) | $180 - $340 |
| Duct sealing (single system, mastic) | $350 - $650 |
| Metal trunk repair | $400 - $800 |
| Full-system air leak repair + pressure test | $600 - $1,200 |
| Duct insulation rewrap (partial to full) | $280 - $1,200 |
What moves a job to the higher end: multiple attic access points, extensive rust or biological growth requiring source removal, or homes over 3,500 square feet with dual systems. What keeps it at the lower end: single-run replacement in accessible attic space, or straightforward mastic sealing with good existing access. Every quote is written and delivered before work starts - Haven Standard Clause 1. No per-vent pricing, no coupon bait. Call (940) 290-8552 for a free estimate.
We Also Serve Cities Near Lewisville
Our crews work throughout the northern Dallas-Fort Worth corridor. If you’re in Coppell, The Colony, Flower Mound, or Carrollton, the same pricing structure and documentation standards apply. We also handle Duct Repair & Sealing in Lewisville and surrounding communities with the same equipment roster and written guarantee.
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
Because builders rarely flush the duct system before handover. We were called to a just-closed home off Fox Avenue where the owners complained of drywall dust puffing from the supply registers every time the air handler kicked on. A camera inspection showed the flex runs packed with construction debris - drywall sanding dust, sawdust, and chunks of insulation - so we set up negative pressure with HEPA filtration, ran agitation tools through every branch, and sealed the plenum joints with mastic that the builder had left wide open. The dust stopped immediately, and the blower motor was pulling noticeably less static pressure on our next visit. Call (940) 290-8552 for an exact quote - estimates are free.
Yes. Technicians working the Castle Hills subdivision and other lakeside-adjacent neighborhoods consistently pull ductwork with visible moisture staining and microbial growth on the duct-board liner - a pattern that largely disappears in similar-vintage homes just five miles inland toward Carrollton or Farmers Branch. Lake Lewisville’s 29,000-acre surface elevates relative humidity in nearby homes, keeping duct interiors damp long enough to support mold colonization even during North Texas dry stretches. That makes lake proximity a reliable predictor of contamination severity before the job even starts. Call (940) 290-8552 for an exact quote - estimates are free.
The symptoms overlap - uneven temperatures, dust, and high energy bills - but the diagnosis differs. Dirty ducts restrict airflow; leaky ducts lose conditioned air to the attic or pull attic air into the system. We distinguish them with a duct blaster test (pressure measurement) and interior camera inspection. If your home is a 1980s-90s tract in Valley Ridge or Timber Creek, you likely have both: degraded duct board shedding debris and corner joints that have never been properly sealed. Call (940) 290-8552 for an exact quote - estimates are free.
Fiberglass duct board and early-generation flex duct. The dominant housing stock in Lewisville is late-1980s to mid-1990s single-family construction where builders routinely installed these materials. Fiberglass duct board sheds liner material as it ages, creating rough interior surfaces that trap allergens and debris far more aggressively than modern sheet metal or insulated flex. The wire helix in early flex duct also corrodes in hot attics. Replacement with modern materials is the durable solution. Call (940) 290-8552 for an exact quote - estimates are free.
Yes, in most cases. Accessible attic and crawl space ductwork can be sealed with mastic or aerosol sealant without interior demolition. Register boots in walls may require limited access if the boot-to-duct connection is leaking, but we photograph the problem and quote any access work in writing before cutting. The majority of Lewisville homes have sufficient attic access to complete full sealing from above. Call (940) 290-8552 for an exact quote - estimates are free.
Ready to stop losing conditioned air to your attic? Call (940) 290-8552 and a live person will schedule your free written estimate. Every CleanRun job includes a Documented Photo Record of every duct run, a written price agreed before work starts, and the 365-Day Done Right Promise - all under the H.A.V.E.N. Standard.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Lewisville since 2013.