Fast, Reliable Duct Repair & Sealing Across Highlands
Duct repair and sealing in Highlands, TX typically runs $280-$650 for most residential jobs, with flex duct replacement starting around $340 and full metal duct sealing on older trunk lines reaching $580-$920. We’re usually on-site in Highlands within 90 minutes of your call, and most repairs finish in a single visit. If you’re smelling musty air, seeing uneven heating, or watching your energy bills climb in a home off Main Street or near the riverbottom, the problem’s likely in your ductwork, not your HVAC unit itself.
We’ve been driving to Highlands since 1984, back when this was still largely petrochemical worker housing with simple ranch homes and pier-and-beam cottages. Our technicians know the difference between a post-Harvey rebuild on River Terrace Drive and an original 1950s flex-duct system that’s never been touched. That matters because the right fix for one is a mistake on the other. Call (866) 347-2063 and we’ll send someone who understands what Highlands homes actually need.
Why Bellows Air Duct & Vent Co. of Texas Is Highlands’s Preferred Duct Repair & Sealing Company
Highlands homeowners don’t call us for flashy trucks or coupon gimmicks. They call because their neighbor on West Wallisville Road did, or because their cousin in Channelview said we showed up when promised and the price matched the quote. After 42 years, our reputation in east Harris County is built on showing up, doing the work, and standing behind it without paperwork battles.
We answer the phone live, 24 hours a day. Not an app. Not a callback queue. A real person at our office who can dispatch a background-checked, uniformed technician to Highlands, TX - usually within the hour during business hours, and always with upfront pricing disclosed before any tool touches your system. Our Duct Repair & Sealing team carries camera inspection equipment on every truck, so you’ll see the damage before we fix it and the results after we’re done.
Wade Kellerman has led this company since its founding, and the 90-Day Done Right Promise he established still governs every job: if it’s not right, we return at no charge. No forms to fill out, no arguments. That promise has kept us in business across four decades of Highlands summers and flood seasons.
Our Duct Repair & Sealing Services in Highlands
Flex Duct Repair
Highlands’s housing stock - those 1940s through 1970s ranch homes and pier-and-beam cottages built for Ship Channel workers - is riddled with aging flex-duct that’s both fragile and heavily contaminated. The original fiberglass and mylar flex runs in these homes were never designed to last 60-plus years, and many have been further compromised by flood saturation, industrial particulate infiltration, or simple humidity collapse. We remove damaged sections, install new insulated flex duct with proper support straps to prevent sagging, and pressure-test the full run before we leave. A typical flex duct repair or partial replacement in Highlands runs $340-$580, depending on linear footage and access difficulty.
Mastic Sealant Application
Standard foil tape fails fast on Highlands metal ductwork. The industrial fallout from the petrochemical corridor - sulfur compounds, particulate matter, and acidic residue - corrodes tape adhesives and creates new leaks within a season. We seal corroded metal trunks and plenums with professional-grade mastic compound from Abatement Technologies, brushed into every joint, seam, and penetration point. This creates a permanent, flexible seal that expands and contracts with temperature swings without cracking. Mastic sealing for a typical Highlands home’s main trunk line runs $280-$450, with full-system sealing on larger homes reaching $650-$920.
Air Leak Repair
Leaks in Highlands ductwork rarely come from single, obvious holes. They come from decades of joint separation, corroded connections, and failed seals in crawl spaces that stay humid year-round. Our technicians pressurize the system and use smoke testing to locate every leak point, then repair with appropriate materials - mastic for metal, proper couplings for flex, or replacement sections where damage is too extensive. We see a lot of “mystery” high energy bills in Highlands from leaky return ducts pulling unconditioned attic or crawl space air into the system. Fixing these typically runs $380-$720 depending on leak severity and system accessibility.
Duct Insulation Replacement
The San Jacinto River bottomlands keep Highlands humidity levels persistently above typical Houston readings, and that moisture attacks duct insulation from the outside in. Saturated insulation loses its R-value, collapses onto the duct, and becomes a breeding ground for mold. We strip compromised insulation, treat the underlying duct for biological growth, and install new foil-faced insulation with proper vapor barriers. Insulation replacement on exposed duct runs in Highlands homes runs $4-$7 per linear foot, with most partial-system jobs falling between $420 and $780.
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 Highlands
We stock parts and materials from Rotobrush, Nikro, Honeywell, and Aprilaire - the same brands serious HVAC contractors specify when they’re building systems meant to last. For Highlands’s particular challenges, we keep Abatement Technologies mastic compound and Honeywell UV treatment systems on our trucks, since industrial fallout and flood-related mold demand more aggressive solutions than standard suburban jobs. Most repairs don’t require a parts order. We diagnose, source from our truck inventory, and finish in one visit. That’s the difference between a company that serves Highlands regularly and one that’s driving back to a Houston warehouse for supplies.
Common Duct Repair & Sealing Problems We See in Highlands Homes
- Flood-damaged flex-duct that’s never been properly assessed. After Hurricane Harvey’s 2017 San Jacinto River overflow, many Highlands homeowners had ductwork “dried out” and left in place. We regularly find these runs collapsed, mold-infested, or structurally compromised - attempting to clean them without first checking integrity often tears the duct open under vacuum pressure.
- Failed tape seals on metal ducts corroded by industrial fallout. The Ship Channel’s continuous emissions create an acidic environment that destroys standard foil tape within months. We see this constantly on older metal trunk lines in Highlands homes, where re-taping every season becomes an expensive cycle of temporary fixes.
- Hidden mold colonies in “remediated” duct runs. Many post-Harvey restoration jobs addressed visible water damage but never opened every duct section. We find established mold networks in submerged runs that were never fully treated, causing recurring indoor air quality problems that sealing alone cannot solve.
- Sagging flex-duct in pier-and-beam crawl spaces. Highlands’s humidity and occasional flooding degrade support straps and cause duct to pool on damp ground, crushing airflow and creating condensation points. Simple re-strapping isn’t enough - the duct material itself often needs replacement after ground contact.
Pricing for Duct Repair & Sealing in Highlands, TX
We’re straightforward about numbers because nobody likes a surprise on the invoice. Here’s what duct repair and sealing costs in the Highlands market:
- Flex duct repair (partial section): $280-$450
- Flex duct replacement (full run, typical room): $340-$580
- Mastic sealant application (main trunk): $280-$450
- Full system mastic sealing: $650-$920
- Air leak detection and repair: $380-$720
- Duct insulation replacement: $4-$7/linear foot ($420-$780 typical)
- Honeywell UV light installation (mold prevention): $380-$520
What moves you up or down in these ranges: accessibility (crawl space vs. attic), extent of mold remediation needed, and whether we’re repairing or replacing. Flood-damaged systems requiring full removal and antimicrobial treatment run higher. We inspect with cameras before quoting, present your exact price before starting, and honor our standing offers: $50 off any repair over $250, a free second opinion on any written estimate, and a permanent 5% senior and veteran discount. Estimates are free. Call (866) 347-2063 to schedule.
We Also Serve Cities Near Highlands
Our trucks run daily to Highlands and surrounding communities - Channelview to the west, Baytown and Mont Belvieu to the east, and Cloverleaf to the northwest. Same technicians, same equipment, same upfront pricing policy across all of east Harris and Chambers counties. If you’re in the Ship Channel corridor or the San Jacinto River bottomlands, we’re your local crew.
Serving Highlands, TX - Our Local Coverage Area
We’re based in the Highlands 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 Highlands
Probably not, if the ductwork was submerged and never replaced. On River Terrace Drive, we took over a 1950s ranch where Harvey floodwaters had soaked the original flex-duct. The homeowner had ‘dried it out’ but we found mold-covered, collapsed sections and failing mastic seals. We removed and replaced 40 feet of flex duct, sealed the main trunk with Abatement Technologies mastic, and installed a Honeywell UV light - a fix that restored airflow and eliminated the musty smell. If your ducts were underwater, call (866) 347-2063 for a camera inspection before spending money on cleaning or sealing.
No. Sealing over mold-contaminated ductwork traps moisture and makes the problem worse. Musty smells indicate active biological growth, and that requires removal, antimicrobial treatment, and often replacement of affected sections. We see this constantly in Highlands homes where post-flood “restoration” addressed surface water but left established mold colonies in hidden duct runs. We’ll camera-inspect, show you exactly what’s growing, and quote the actual fix - not a cover-up. Call for a free second opinion if another company suggested sealing without inspection.
Because standard foil tape fails within months when exposed to Highlands’s industrial fallout from the Ship Channel petrochemical corridor. Sulfur compounds and acidic particulates corrode tape adhesive, and the high humidity accelerates the breakdown. We see this on homes near Main Street and throughout the 77562 ZIP code. The permanent solution is mastic sealant, brushed into every joint and seam - it flexes with temperature changes and resists chemical degradation. Retaping is throwing money away. We’ll show you the difference on camera.
Sometimes, but usually the sagging indicates material failure from age, humidity saturation, or ground contact in the crawl space. Highlands’s pier-and-beam homes were built with minimal clearance, and decades of river-bottom moisture degrade the duct structure itself. We inspect for tears, collapsed sections, and mold growth before recommending anything. If the flex is structurally sound, we can re-support and patch. More often, partial replacement with proper strapping and insulation is the lasting fix. We’ll give you both options with prices, and you decide.
The San Jacinto River bottomlands create a microclimate significantly more humid than typical Houston, which means accelerated mold growth, faster corrosion of metal components, and premature breakdown of inferior sealants and tapes. We specify materials rated for high-humidity environments - mastic instead of tape, closed-cell insulation where appropriate, and UV light systems to control biological growth between service visits. Standard materials that work fine in Katy or The Woodlands often fail early in Highlands. Our repairs are built for where you actually live.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co., serving Highlands since 1984.