Fast, Reliable Duct Repair & Sealing Across Highlands
Duct repair and sealing in Highlands, TX typically runs $280–$650 for most residential jobs, with same-day service available when you call before noon. We’re based in Houston and regularly roll to Highlands within 45 minutes—down I-10 East or Wallisville Road depending on traffic—because we know this area’s duct problems aren’t like anywhere else in Harris County. If your system is blowing dusty air, smelling like petroleum, or your energy bills have climbed since last summer, give us a call at (855) 683-5929 for a free, no-obligation inspection. Our Duct Repair & Sealing team has worked on hundreds of Highlands homes, from the older neighborhoods near Main Street to the post-Harvey rebuilds closer to the San Jacinto River.
Why Lone Star Air Duct Cleaning Service Houston Is Highlands’s Preferred Duct Repair & Sealing Company
We’ve earned a 4.9-star average across 433 verified reviews, and a solid chunk of those come from Highlands homeowners who’ve watched us pull apart their duct systems and explain exactly what the Ship Channel’s doing to their air quality. Owner Scott Gray leads every job personally—he’s the one crawling through your attic, not some subcontractor we hired last week. That matters in Highlands, where ductwork sits in punishing conditions: 90%+ humidity, corrosive industrial fallout, and in many homes, a legacy of flood damage that wasn’t properly remediated.
Our response time to Highlands is consistently under an hour. We know the back roads when 610’s jammed, and we know which Highlands neighborhoods built in the 1960s and 70s are running flex duct through unconditioned attics that cook the material to brittleness. Scott Gray’s two decades of hands-on experience means he’s seen the specific failure patterns this area produces—greasy buildup on metal joints, mastic that crumbles in eighteen months instead of ten years, flex duct that pools condensation until it tears at the sag points.
We don’t send salespeople. We send a technician who owns the company. That’s the difference Highlands customers tell their neighbors about.
Our Duct Repair & Sealing Services in Highlands
Duct Sealing with Industrial-Grade Mastic
Standard mastic sealants fail fast in Highlands. The petroleum-based particulate matter drifting in from the Houston Ship Channel refineries reacts with cheaper sealants, breaking them down from the outside in. We use high-temperature, chemical-resistant mastic rated for industrial environments—because that’s what this environment demands. We recently sealed a flex duct run in a 1960s home on Main Street where the original mastic had crumbled from years of exposure to airborne hydrocarbon fallout. Using Rotobrush equipment to clean the interior first, we reapplied high-temperature mastic sealant and reinforced the connections with metal collars, ensuring the system could handle the corrosive local air quality.
Flex Duct Repair
Highlands homes built between the 1950s and 1970s are loaded with flex duct running through attics that hit 140°F in July and trap humidity year-round. Sagging flex duct pools condensation, and in this climate, that means mold within weeks and material failure within seasons. We don’t just patch the tear—we address the sag. We re-support the run, replace damaged sections with properly rated material, and seal every connection with mastic that won’t degrade in Highlands’s specific air chemistry. Slab foundations common here mean ductwork often runs through crawl spaces or soffits where access is tight; we’ve got the tools and the patience to do it right.
Metal Duct Repair
Galvanized metal duct in Highlands takes a beating. The greasy, dark-gray film we regularly wipe from metal surfaces isn’t household dust—it’s industrial fallout that accelerates corrosion at joints and seams. We cut out damaged sections, fabricate replacements on-site, and weld or mechanically fasten with proper reinforcement. Every metal repair gets sealed with industrial-grade mastic and pressure-tested before we close up. In Highlands, a metal duct repair that skips the right sealant is a repair you’ll be paying for again next year.
Duct Insulation
Uninsulated or poorly insulated ductwork in Highlands is throwing money straight into the Gulf. With ambient humidity this high and attic temperatures this extreme, bare ducts sweat, grow mold, and lose 20–30% of their conditioned air before it reaches your vents. We install foil-faced fiberglass insulation with proper vapor barriers, sealed at every seam, to keep the cold air cold and the hot air contained. For post-Harvey homes where insulation was stripped and never properly replaced, this is often the single biggest comfort upgrade available.
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 carry Honeywell and Aprilaire components for Highlands customers who need integrated air-quality solutions—media filters, whole-house humidistats, and ventilation controls that work with repaired duct systems rather than fighting them. Our Rotobrush rotary brush systems and Nikro HEPA vacuums clean duct interiors before we seal them, which is critical here: sealing over petroleum-contaminated surfaces traps those hydrocarbons in your airflow permanently. We stock the right parts so Highlands jobs don’t get delayed waiting for a shipment from Dallas.
Common Duct Repair & Sealing Problems We See in Highlands Homes
- Mastic failure from chemical exposure: Improper sealant selection fails within months due to reaction with industrial fallout, creating new leaks in ducts we didn’t even touch. We see this constantly in Highlands—homeowners who paid for sealing two years ago and now have gaps bigger than before.
- Flex duct sag and condensation rot: Flex duct repairs done without addressing sagging or condensation pooling quickly fail again in Highlands’ high humidity, especially in attics. The tear isn’t the root problem; the unsupported run is.
- Post-flood mold recurrence: Post-Harvey duct repairs that skipped full microbial remediation lead to recurrent mold contamination, especially on slab foundations where ductwork sat in floodwater and was simply dried, not properly cleaned and sealed.
- Petroleum-tinged persistent odor: Even after cleaning, ducts in Highlands near the Ship Channel can redevelop that faint fuel smell because standard sealants don’t block hydrocarbon vapor migration through microscopic gaps. Our industrial-grade sealing process does.
Pricing for Duct Repair & Sealing in Highlands, TX
Here’s what we typically see in the Highlands market:
- Duct sealing (whole system): $280–$450
- Flex duct repair (per run): $180–$340
- Metal duct repair (section replacement): $220–$480
- Duct insulation (per run): $150–$290
- Post-flood remediation + sealing: $450–$850 depending on contamination extent
What moves you within these ranges: accessibility (crawl space versus open attic), material length needed, and whether we’re cleaning contaminated surfaces before sealing. Homes closer to the Ship Channel with heavy industrial buildup take longer to prep. We don’t guess—Scott Gray inspects every system in person and gives you a written, itemized estimate before any work starts. Estimates are free. Call (855) 683-5929 to schedule.
We Also Serve Cities Near Highlands
We run regular routes to Channelview, Baytown, Cloverleaf, and La Porte—all dealing with similar industrial and coastal humidity challenges. If you’re in 77562 or any of these surrounding communities, we’re already in your area.
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
Standard sealants don’t block hydrocarbon vapor migration from the Ship Channel’s ambient industrial fallout. We use high-temperature, chemically resistant mastic and pre-clean with Rotobrush systems to remove contaminated surface layers before sealing. If your previous contractor skipped that prep step, the petroleum compounds keep off-gassing through microscopic gaps. Call (855) 683-5929 for an inspection—we’ll show you exactly where the seal failed.
Our industrial-grade mastic sealant applications typically hold 8–12 years in Highlands conditions, versus 2–4 years for standard residential sealants that degrade in this environment. The key difference is chemical resistance to hydrocarbon exposure and proper surface prep. We also inspect Highlands jobs more frequently than our inland customers because this climate and air chemistry demand it. Call (855) 683-5929 to discuss our follow-up inspection schedule.
It depends on contamination level and material condition. Ductwork that sat in floodwater for more than 48 hours usually needs section replacement, not just repair—mold embeds in flex duct insulation and metal duct liner. We’ve found numerous Highlands homes where post-2017 repairs only addressed visible damage, leaving active mold colonies inside. Scott Gray will scope the interior and give you an honest assessment. Call (855) 683-5929 for a free evaluation.
Yes, though access is more complex. Many Highlands slab homes from the 1960s and 70s have duct runs embedded in or beneath the slab, accessible through strategic cuts or existing junction boxes. We use flexible sealing tools and camera verification to ensure complete coverage without unnecessary concrete work. Not every contractor has this capability. Call (855) 683-5929 to discuss your specific layout.
We specify industrial-grade, high-temperature mastic rated for chemical exposure—not the consumer-grade products you’ll find at hardware stores. The exact formulation varies by application, but it’s always selected for resistance to the petroleum-based particulate and extreme humidity that defines Highlands’s environment. Scott Gray chooses the product based on what your specific system faces. Call (855) 683-5929 for details on your job.
Ready to fix your ductwork for good? Call (855) 683-5929 now for a free estimate. Owner Scott Gray will inspect your Highlands home personally, explain what the Ship Channel’s doing to your system, and give you a straight price for a repair that actually lasts.
Written by Scott Gray, Owner at Lone Star Air Duct Cleaning Service Houston, serving Highlands and the greater Houston area since 2004.