Fast, Reliable Duct Repair & Sealing Across Spring
Duct repair and sealing in Spring, TX typically runs $280-$680 for most homes, with same-day service available when you call before noon. We handle everything from separated flex duct in 1980s ranch homes to full-system sealing in the newer master-planned communities near The Woodlands.
We’ve been driving out to Spring since Bellows started in 1984, and we know the difference between a quick tape job and a repair that actually lasts through another Gulf Coast summer. Our technicians are background-checked, uniformed, and carry the equipment to finish most jobs in a single visit. Call us at (844) 685-6342 - a live person answers, 24 hours a day.
Why Bellows Air Duct & Vent Co. Is Spring’s Preferred Duct Repair & Sealing Company
Spring homeowners have called us for over four decades because we show up when we say we will and we don’t change the price at the door. Our Duct Repair & Sealing team knows the local housing stock - from the original 1970s brick ranches off Kuykendahl Road to the 4,000-square-foot builds in Gleannloch Farms - and we price every job upfront before a single tool gets lifted.
Our reviews from Spring customers consistently mention the camera inspection. We show you the separated joint, the sagging flex, or the mold colony before we quote a dollar. No scare tactics. No bait coupons. Our 90-Day Done Right Promise is stamped on every invoice: if it’s not right, we make it right with no paperwork and no arguing.
Response time matters in a climate where your AC runs ten months a year. We typically reach Spring homes within 90 minutes to two hours from dispatch, and we carry Rotobrush and Abatement Technologies equipment on every truck so we’re not waiting on parts.
Our Duct Repair & Sealing Services in Spring
Mastic Sealant Application
Mastic is the only sealant we trust for Spring’s humidity. Duct tape dries and fails in attics that hit 140 degrees; mastic stays flexible. We brush or spray a thick coat over every joint, seam, and penetration, then mesh-tape structural gaps before a second coat. In Spring’s older homes near FM 2920, we regularly find original duct tape that turned to powder years ago - the system has been leaking conditioned air into the attic for a decade. A typical mastic sealing job in Spring runs $280-$450 for a single system.
Flex Duct Repair
Flex duct is the weak link in most Spring homes built between 1970 and 1995. The fiberglass liner sags, the wire helix corrodes, and the insulation compresses. We took a call from a homeowner on Kuykendahl Road near Cypresswood Drive, in a 1982 brick ranch with original fiberglass flex duct. The supply register in the master bedroom had a musty smell, and our inspection found a separated joint where the flex had pulled loose from the metal plenum at a crawlspace penetration - a classic Harvey-era issue where flood moisture had softened the duct tape and the connection failed. We sealed the gap with mastic and mesh, replaced the degraded flex section, and insulated the repair to prevent future condensation. Flex duct repair in Spring typically costs $180-$340 per run, with full replacement at $45-$65 per linear foot.
Metal Duct Repair
Galvanized steel ductwork in Spring’s older homes rusts at seams where condensation collects, especially in unconditioned attics. We cut out corroded sections, fabricate replacement pieces on-site, and seal with mastic - not tape. For buried metal duct in slab homes near Spring Creek, we use borescope inspection to assess damage before recommending any access cuts. Metal repairs run $320-$580 depending on accessibility.
Duct Insulation
Spring’s attic temperatures destroy duct insulation. We install fresh R-6 or R-8 foil-faced insulation over repaired sections, sealed with matching tape at every seam. Proper insulation prevents the condensation that leads to mold in our 70%-plus humidity. Duct insulation in Spring averages $2.80-$4.50 per linear foot, with most partial-system jobs landing between $340-$620.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
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 Spring
We stock parts and specify equipment from Rotobrush, Abatement Technologies, and Aprilaire - the same brands serious HVAC contractors use, not the consumer-grade stuff that fails in a year. Our trucks carry mastic, mesh, flex duct, and insulation in standard diameters so we’re not making a supply run while your attic sits open. For Spring homeowners, that means most repairs finish in one visit, and the price we quote is the price on the invoice.
Common Duct Repair & Sealing Problems We See in Spring Homes
- Sagged and collapsed flex duct in 1970s-1990s tract homes. Original fiberglass flex duct has sagged and collapsed under decades of attic heat and humidity, creating hidden blockages that feel like airflow problems but are really structural failure. Homeowners call us about “weak airflow” and we find a duct that’s folded over itself like a garden hose.
- Residual microbial growth in post-Harvey homes. Post-Harvey homes in the Spring Creek floodplain often have residual microbial growth inside duct boots and at floor registers where floodwater wicked up the duct liner. Routine sealing doesn’t kill the mold, so we always combine repair with antimicrobial fogging.
- Leaks at buried junction boxes in large master-planned homes. In the large master-planned homes near The Woodlands (77380-77382), long complex duct runs with multiple branches develop leaks at buried junction boxes that are nearly impossible to reach without cutting into finished ceilings, making a full system-wide pressure test essential before committing to a seal.
- Condensation damage from missing or degraded insulation. Spring’s Gulf Coast subtropical climate keeps relative humidity above 70% for most of the year, and central AC runs nearly year-round. Duct systems continuously cycle warm, moisture-laden return air, creating near-ideal conditions for mold colonization inside flex duct liners, especially anywhere condensation or minor duct leakage has occurred.
Pricing for Duct Repair & Sealing in Spring, TX
We’re plain about numbers because Spring homeowners have been burned by low bids that balloon once the truck arrives.
| Service | Typical Range in Spring |
|---|---|
| Mastic sealant (single system) | $280-$450 |
| Flex duct repair (per run) | $180-$340 |
| Flex duct replacement (per linear foot) | $45-$65 |
| Metal duct repair | $320-$580 |
| Duct insulation (per linear foot) | $2.80-$4.50 |
| Full system pressure test | $150-$220 |
| Antimicrobial fogging (with repair) | $120-$180 |
What moves the price: attic accessibility, extent of flood damage, whether we need to cut access panels, and if mold remediation is required alongside sealing. We always inspect with a borescope and moisture probe first - especially in Spring’s 77373 and 77388 neighborhoods, where Hurricane Harvey floodwaters sat in crawlspaces and slab edges, wicking up into duct boots and flex liners, leaving residual microbial colonies even after visible water was gone. We never quote a repair without that check.
Standing offers: $50 off any repair over $250, free second opinion on any written estimate, and a permanent 5% senior and veteran discount. Estimates are free. Call (844) 685-6342.
We Also Serve Cities Near Spring
Our service area covers Spring and the surrounding communities - The Woodlands, Atascocita, Houston, and Alief. Same trucks, same technicians, same upfront pricing. If you’re on the edge of our map, call and we’ll tell you straight whether we can reach you today.
Serving Spring, TX - Our Local Coverage Area
We’re based in the Spring 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 Spring
Yes, sealing alone isn’t enough if mold survived the drying process. In Spring’s 77373 and 77388 neighborhoods, Hurricane Harvey floodwaters sat in crawlspaces and slab edges, wicking up into duct boots and flex liners, leaving residual microbial colonies even after visible water was gone - so we never quote a repair without a moisture probe and borescope inspection to catch hidden mold in the duct envelope. If we find active growth, we combine sealing with antimicrobial fogging. Call (844) 685-6342 for a free inspection.
It will, but only if the ductwork is structurally intact. In Spring’s older 1970s-1990s tract homes, original fiberglass flex duct has sagged and collapsed under decades of attic heat and humidity, creating hidden blockages that feel like airflow problems but are really structural failure. Sealing a collapsed duct is like patching a flat tire - it helps, but the real fix is replacement. We inspect first, then tell you which problem you actually have. Free estimates at (844) 685-6342.
Replace if more than 40% of the system is compromised, if flood damage is widespread, or if the ductwork is original fiberglass flex past 30 years. Repair makes sense for localized failures - one separated joint, a single crushed run, or leaks at accessible junction boxes. In Spring’s market, partial repair with mastic sealing typically runs $280-$680, while full replacement starts around $2,800-$4,500. We’ll show you the camera footage and give you both numbers. No pressure. Call (844) 685-6342.
We work in attics year-round, but we schedule the most demanding jobs for morning hours when attic temperatures are lowest. Spring’s summer attic heat peaks above 140 degrees by mid-afternoon, so we start early, bring hydration and cooling gear, and break the job into phases if needed. Most sealing jobs finish in two to four hours. If you’re concerned about timing, ask when you call - we’ll be straight about whether your job needs a morning slot. (844) 685-6342.
Sometimes, but not always. In the large master-planned homes near The Woodlands (77380-77382), long complex duct runs with multiple branches develop leaks at buried junction boxes that are nearly impossible to reach without cutting into finished ceilings, making a full system-wide pressure test essential before committing to a seal. If the pressure test shows leaks only at accessible points, we seal without cuts. If the junction box itself has failed, we discuss access options with you before touching a tool. Free pressure test with any repair estimate - call (844) 685-6342.
Ready to stop losing conditioned air to your attic? Call Bellows Air Duct & Vent Co. at (844) 685-6342 for a free estimate on duct repair and sealing in Spring. We’ll inspect with a camera, show you what we find, and give you one honest price before we start. Our 90-Day Done Right Promise means if it’s not right, we make it right - no paperwork, no arguing. That’s how we’ve worked since 1984.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Spring since 1984.