Fast, Reliable Duct Repair & Sealing Across Highland Village
Most duct repair jobs in Highland Village run $180-$650 and are finished in a single visit, with same-day service available when you call before noon. If your vents are blowing weak, your upstairs never cools, or you’re catching that musty “lake smell” when the AC kicks on, the problem is usually cracked flex duct, failed mastic seals, or degraded insulation in a system that’s been baking in your attic for twenty-plus years.
We’ve been driving out to Highland Village from our dispatch since the mid-1990s, back when most of these homes were still under construction. We know the neighborhoods off Highland Village Road, the custom builds on Copperas Lane, and the lakefront properties where the humidity off Lake Lewisville does things to ductwork you don’t see five miles inland. Our technicians are background-checked, uniformed, and carry the equipment to repair or replace flex duct, seal metal joints, and reinsulate runs on the spot. Call (844) 685-6342 and you’ll reach a live person, 24 hours a day. We’ll give you an upfront price before we start, and we back every job with our 90-Day Done Right Promise in writing.
Why Bellows Air Duct & Vent Co. Is Highland Village’s Preferred Duct Repair & Sealing Company
Highland Village homeowners don’t call us for flash. They call because they’ve lived in the same house since 1998, they’ve already been burned by a contractor who “fixed” the problem twice, and they want it done right so they never think about it again. That’s who we built this company for.
Ray Castillo has led Bellows Air Duct & Vent Co. since 1984, and our reputation in Highland Village rests on showing up when we say, explaining the repair before touching a tool, and leaving a camera record of what we found and what we fixed. Our 90-Day Done Right Promise means if something isn’t right, we return at no charge. No paperwork to file, no argument.
We answer calls live, 24/7. Not an app, not a voicemail tree. A real person who can dispatch a technician to Highland Village, usually same day. Most jobs finish in one visit because our trucks carry Rotobrush and Nikro equipment plus the flex duct, mastic, and insulation to handle large custom homes without a parts run.
Our standing offer for Highland Village: $50 off any repair over $250, free second opinions on any written estimate you bring us, and a permanent 5% senior and veteran discount. The price we quote on the phone is the price on the invoice.
Our Duct Repair & Sealing Services in Highland Village
Flex Duct Repair
Highland Village’s housing stock is dominated by large custom homes built between the mid-1980s and mid-2000s, most with multi-zone systems and long flex-duct runs through superheated attics. Those original inner liners are now 20-30 years old, and they’re degrading into brittleness. We regularly pull registers in Highland Village homes and find the inner liner shedding fibers and restricting airflow. Patching doesn’t hold on degraded material. We replace the damaged section with new insulated flex duct, properly supported and sealed, so the system moves air the way it was designed to.
Mastic Sealant Application
Metal duct joints and connections in Highland Village’s older systems were often sealed with tape that’s dried and failed. We apply professional-grade mastic sealant, a thick, fiber-reinforced compound that brushes onto joints and cures to a permanent, flexible seal. Unlike tape, mastic won’t degrade in attic heat. We use it on every metal-to-metal connection and every flex duct collar in Highland Village homes, because air leakage in a 4,000 sq ft house with long duct runs is measurable on your electric bill.
Duct Insulation Replacement
The insulation wrapped around your ductwork keeps conditioned air cold and prevents condensation. In Highland Village, where Lake Lewisville drives ambient humidity higher than inland suburbs like Flower Mound or Corinth, degraded insulation is a double problem: energy loss and moisture accumulation on cold duct surfaces. We replace wet, compressed, or rodent-damaged insulation with new R-6 or R-8 wrap, properly sealed and supported, to stop both issues.
Metal Duct Repair
Some Highland Village homes, particularly earlier builds from the 1980s, have galvanized metal trunk lines with corroded seams or disconnected branches. We repair or replace damaged sections, seal with mastic, and reinforce supports so the system doesn’t rattle or leak. Our trucks carry the tools and materials to fabricate fittings on site, so we’re not making two trips.
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.
Trusted Brands We Service in Highland Village
We repair and seal ductwork connected to all major HVAC brands, and we stock parts and materials from Rotobrush, Nikro, and Abatement Technologies on every Highland Village truck. These are the same brands serious HVAC contractors specify, not discount-house generics. For insulation and air quality components, we use Guardsman and Aprilaire products where the job calls for them. Having the right material on hand means most Highland Village repairs finish in one visit, not two.
Common Duct Repair & Sealing Problems We See in Highland Village Homes
- Degraded flex-duct inner liners in 1990s homes. The original liner material becomes brittle and starts shedding fibers into the airstream. Homeowners notice reduced airflow and dust. We replace the section rather than patch it, because patched brittle liner fails again within months.
- Mold colonization on flex-duct surfaces near the lake. Highland Village’s lakefront-adjacent neighborhoods, like those along Highland Village Road, consistently show mold on flex-duct inner liners. Homeowners describe it as “lake smell.” What’s actually happening: they open lake-view windows during shoulder seasons, humid air settles in the ductwork, and when the AC restarts, cold surfaces plus moisture equals microbial growth.
- Oversized AC units short-cycling in large custom homes. Many Highland Village homes were built with units too powerful for the ductwork design. The system blasts cold air, shuts off quickly, and leaves supply ducts cold and wet. During humid months, that intermittent wetness promotes mold. Proper duct sealing and insulation help, but we also flag when the root issue is equipment sizing.
- Failed tape seals on metal joints. Original duct tape dries and loses adhesion in hot attics. We find 15-20% air leakage in some Highland Village systems, all from failed seals. Mastic application restores efficiency and reduces the load on your compressor.
Pricing for Duct Repair & Sealing in Highland Village, TX
We don’t do bait coupons or “starting at” pricing that doubles at the door. Here’s what duct repair and sealing costs in the Highland Village market:
| Service | Typical Range in Highland Village |
|---|---|
| Single flex duct section replacement (up to 25 ft) | $180 - $340 |
| Mastic sealant application, whole system | $450 - $750 |
| Duct insulation replacement, partial system | $380 - $620 |
| Metal duct section repair or replacement | $280 - $550 |
| Multi-zone flex duct system, full repair and seal | $1,200 - $2,400 |
Factors that move the price: accessibility in your attic, extent of mold damage requiring remediation before sealing, and whether we need to replace multiple degraded sections or just seal and insulate intact ductwork. We inspect with a camera before quoting, so you see what we see. Estimates are free, and our $50 off any repair over $250 applies to every Highland Village job. Call (844) 685-6342 for an exact quote.
We Also Serve Cities Near Highland Village
Our technicians cover the full Lake Lewisville shoreline area, including Highland Village, Flower Mound, Lewisville, Corinth, and Coppell. If you’re in one of these communities and your ducts need attention, the same live-answer dispatch, same-day availability, and same upfront pricing apply.
Serving Highland Village, TX - Our Local Coverage Area
We’re based in the Highland Village 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 Highland Village
Yes. Highland Village’s position on the northern shoreline creates localized humidity levels measurably higher than inland DFW suburbs, and that moisture feeds mold growth on cold duct surfaces, especially in spring and fall when homeowners open lake-view windows before switching the AC back on. We regularly find mold on flex-duct inner liners in lakefront-adjacent neighborhoods that homeowners mistake for “lake smell.” If you’re noticing musty odors when the system starts, call (844) 685-6342 for a camera inspection. Estimates are free.
Replace degraded sections, seal and insulate the rest. Flex-duct inner liners from that era are now reaching the end of their service life; they become brittle and shed fibers rather than holding a patch. We replace damaged runs with new insulated flex duct and apply mastic sealant to all remaining joints. For a typical Highland Village home, this hybrid approach runs $800-$1,800 versus $3,500+ for full replacement. We’ll show you camera footage of your specific system and recommend accordingly. Call (844) 685-6342 to schedule.
Mastic is a thick, fiber-reinforced compound that brushes onto duct joints and cures to a permanent, flexible seal. We use it instead of tape because tape fails in attic heat; mastic lasts the life of the system. In Highland Village’s large homes with long duct runs, even small leaks add up to significant energy loss and humidity infiltration. Mastic sealing is standard on every metal joint and flex collar we touch. It’s included in our whole-system sealing quotes starting at $450.
Oversized units short-cycle, blasting cold air then shutting off before the ducts fully warm up. This leaves supply-side surfaces cold and intermittently wet, which promotes mold when Highland Village’s lake-driven humidity is high. Many 3,000-5,000 sq ft custom homes here have this problem because builders sized for square footage without accounting for ductwork design. We can’t resize your AC, but proper duct sealing and insulation reduce the temperature differential that causes condensation. We’ll flag suspected sizing issues during inspection so you can discuss with your HVAC contractor. Call (844) 685-6342 for a free look.
Yes. We regularly work in lakefront-adjacent Highland Village neighborhoods, including properties along Highland Village Road and near the marina areas. Our trucks carry the equipment to handle the larger custom homes typical of these locations, and we’re familiar with the specific moisture issues that lake proximity creates. Same-day service is usually available with morning scheduling. Call (844) 685-6342 to book.
Schedule Your Free Duct Inspection in Highland Village
We recently sealed a multi-zone flex-duct system in a 4,200 sq ft custom home on Copperas Lane, where the homeowner complained of musty “lake smell” in the master bedroom. We discovered mold on the inner liner of a 22-year-old flex run, replaced that section with new insulated flex duct, and applied mastic sealant to all remaining joints to stop air leakage. Camera footage before and after went on the invoice. That’s how we work: you see what we see, you know the price before we start, and we stand behind it for 90 days with no paperwork if something needs adjustment.
If your Highland Village home was built in the 1990s or early 2000s, your ductwork is likely past due for inspection. Weak airflow, uneven cooling, musty odors, or rising electric bills are all signs the system needs attention. Our Duct Repair & Sealing team serves all of Highland Village, including lakefront properties and neighborhoods throughout 75077. Call (844) 685-6342 now for a free estimate. We’ll answer live, dispatch a background-checked technician, and show you exactly what your ducts need before any work begins.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Highland Village since 1984.