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 Houston
Duct repair and sealing in Houston typically runs $280-$680 for most residential jobs, with full flex duct replacement in a single zone reaching $900-$1,400. Our crews are dispatched from our Houston office and serve homeowners throughout the metro, including Pasadena, South Houston, Bellaire, and Deer Park. Call (346) 253-1822 for a written estimate before any work starts.
We’ve been in Houston attics since 2013. We know what 150°F summer temperatures do to flex duct glued with mastic in 1987. We know which neighborhoods built during the oil boom have metal trunks with disintegrating fiberglass liner, and which post-2000 subdivisions have cheap flex duct already sagging off collars. That local knowledge changes what we find, how we fix it, and what we quote before a single panel comes off.
Why CleanRun Air Duct Cleaning Pearland Is Houston’s Preferred Duct Repair & Sealing Company
Our reputation in Houston is built on documentation, not claims. Every job starts with a written price under Haven Standard Clause 1, and every duct run is photographed before and after. Homeowners in Houston receive the photo record as a standard deliverable, not an add-on. They can see the separated joint at the first elbow, the mold staining on the flex liner, the mastic bead after sealing. Tomas Reyes established this practice in 2013 because evidence outperforms promises.
Response time matters in Houston’s climate. When a duct system is leaking conditioned air into a 150°F attic, every day of delay costs money and lets humidity migrate into the building envelope. Our Houston office coordinates same-week scheduling for most repair and sealing requests, with crew arrival windows confirmed by text and technician name and photo sent before arrival. Haven Standard Clause 3: Verified Crews means background-checked, uniformed technicians identified by name.
We also offer a Free Second Opinion on any written estimate from a competitor. Bring us another company’s scope and price. We’ll put our number next to it in writing, with line-item detail on what each covers.
Our Duct Repair & Sealing Services in Houston
Duct Sealing
Leaky duct joints in Houston attics don’t just waste cooled air. They pull 150°F, humidity-saturated attic air into the supply stream every time the blower cycles off and pressure equalizes. Our duct sealing service targets every joint, collar, and plenum connection with mastic sealant rated for the temperature swings Houston attics see. We pressurize the system and verify seal integrity before we leave. Typical duct sealing for a Houston single-system home runs $280-$450.
Flex Duct Repair
Houston’s expansive clay soils shift foundations and pull duct connections apart. In neighborhoods like Meyerland and along the Energy Corridor, we regularly find flex duct torn at the plenum collar or sagging between supports, creating low spots where condensation pools. Our flex duct repair replaces damaged sections with new insulated flex, supports it properly, and seals with mastic, not tape. A single flex duct run replacement in Houston typically costs $180-$340; multiple zones run higher.
Metal Duct Repair
Older Houston homes, especially 1960s-1980s ranch builds in areas like Spring Branch and near the northwest loop, often have galvanized metal trunk lines with fiberglass interior liner. That liner degrades, tears, and sheds particles into the airstream. Metal duct repair involves liner replacement or full section rebuild, sealed and insulated to current standards. These jobs range $450-$850 depending on accessibility and extent.
Duct Insulation
Uninsulated or poorly insulated ductwork in a Houston attic is a thermal bridge. Supply air gains 10-15°F before it reaches the register. Our duct insulation service wraps existing metal or flex with formaldehyde-free insulation, sealed at all seams, to maintain design temperature to the point of delivery. Insulation retrofits in Houston typically run $320-$580 per system.
Mastic Sealant Application
We use mastic sealant, not foil tape, on every Houston job. Tape degrades in attic heat within 3-5 years. Mastic remains flexible and bonded for the life of the duct system. We brush-apply a continuous bead at every joint, then verify with pressure testing. This is standard on every CleanRun sealing job, not an upgrade.
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 Houston
Our Houston crews carry professional-grade equipment from trade-recognized brands: Rotobrush agitation systems for mechanical debris removal, Abatement Technologies HEPA-negative air machines for containment during mold remediation, and Aprilaire media filters and whole-home dehumidifier components when upgrades are part of the scope. We stock common flex duct diameters, collars, and mastic compounds locally, so most Houston repairs don’t wait on parts orders. Equipment specifics are documented on every written scope so customers can verify manufacturer specifications independently.
Common Duct Repair & Sealing Problems We See in Houston Homes
- Condensation at separated flex duct joints. Houston’s clay soils shift foundations seasonally, pulling duct connections apart. Where a 150°F attic meets 55°F supply air, separated joints become condensation points. The moisture feeds mold growth on the flex liner that accelerates far beyond what drier climates see.
- Mold regrowth in post-Harvey gut-and-rebuild homes. In flood-damaged neighborhoods like Meyerland and Kingwood, remediation crews often replaced all interior drywall but left original ductwork in place. Our camera inspections regularly find active mold colonies inside systems whose surrounding walls look brand new.
- Failed “sanitiser” fogging treatments. Fogging leaves biofilm and microbial growth intact on the duct liner. It kills surface organisms temporarily but doesn’t remove the organic material where mold re-colonizes. Within one Houston humid season, growth returns. Source removal under negative pressure with mechanical agitation is the only durable fix.
- Sagging flex duct in unconditioned attics. Houston’s 10-plus-month cooling season means near-constant thermal cycling. Improperly supported flex duct gradually sags, creating low spots where condensation collects and insulation compresses. We see this in homes across Katy, Pearland, and the Energy Corridor.
Pricing for Duct Repair & Sealing in Houston, TX
Honest pricing means numbers in writing before work starts. Haven Standard Clause 1 requires it. Here are typical ranges for Houston’s market:
| Service | Typical Range |
|---|---|
| Duct sealing (single system, mastic application) | $280-$450 |
| Flex duct repair (single run replacement) | $180-$340 |
| Flex duct repair (multiple runs / full zone) | $650-$1,100 |
| Metal duct repair with liner replacement | $450-$850 |
| Duct insulation retrofit (per system) | $320-$580 |
| Post-flood mold remediation with source removal | $780-$1,400 |
What moves a job toward the higher end: attic accessibility (tight truss spacing, blown-in insulation depth), extent of mold contamination requiring HEPA-contained removal, and whether multiple zones or trunk lines are involved. Every estimate is free, delivered in writing, and valid for 30 days. No per-vent pricing. No coupon that balloons once the truck arrives. Call (346) 253-1822.
We Also Serve Cities Near Houston
Our Houston office dispatches crews throughout the metro area. We regularly perform duct repair and sealing in Pasadena, South Houston, Bellaire, and Deer Park, with the same written pricing, documented photo record, and 365-Day Done Right Promise that applies inside Harris County.
Serving Houston, TX - Our Local Coverage Area
We’re based in the Houston 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 Houston
Houston’s 70-75% year-round humidity and 10-plus-month cooling season create conditions that inland Texas markets simply don’t match. Flex duct interiors stay moist for longer periods, and the temperature differential between 150°F attic air and cold supply air drives condensation at any joint that isn’t perfectly sealed. Mold and biofilm colonize the liner material itself, then regrow after surface treatments. Dallas and Austin see shorter cooling seasons and lower sustained humidity, so ducts dry faster between cycles and mold accumulates more slowly. If you’re seeing musty odors or visible growth around registers, call (346) 253-1822 for a camera inspection and written scope.
Yes. In Meyerland, Kingwood, and parts of the Energy Corridor, post-Harvey gut-and-rebuild crews routinely replaced all interior drywall but left original ductwork untouched. Our camera inspections regularly find active mold colonies and biofilm inside flex duct runs whose surrounding walls show no visible water damage. The duct liner is porous; once mold establishes, it survives drywall replacement. We document this with before-and-after photography on every job. Call (346) 253-1822 for a free inspection if your home was remediated after 2017.
No. Fogging kills surface organisms temporarily but leaves the biofilm and organic substrate intact on the duct liner. In Houston’s sustained humidity, mold re-colonizes that substrate within one season. Source removal under negative pressure with HEPA filtration and mechanical agitation is the only method that removes the material where mold lives. Our Duct Repair & Sealing crews use Rotobrush agitation and Abatement Technologies negative-air containment for this work, with photo documentation of the cleaned surface. Fogging is cheaper. It is not equivalent.
Houston’s expansive clay soils shift foundations as moisture content changes seasonally. That movement transfers to duct connections, particularly where flex duct meets metal plenums or trunk lines. The 150°F attic temperature also degrades adhesive and tape bonds faster than in cooler climates. Separated joints leak conditioned air, pull in humid attic air, and create condensation points. We repair with mastic sealant, which remains flexible and bonded through thermal cycling, and we verify seal integrity with pressure testing before leaving.
Our Documented Photo Record shows you. Every duct run is photographed before work starts and after completion, with the camera image delivered as part of your job record. You see the separated joint, the mold staining, the debris buildup at the elbow. Then you see the sealed joint, the clean liner, the supported flex. The 365-Day Done Right Promise backs this in writing: if the work isn’t right, we make it right. No manager approval required. Call (346) 253-1822 to schedule.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Houston since 2013.