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 costs $280-$650 for most residential jobs, with flex duct replacement running $180-$340 per run and full-system mastic sealing averaging $450-$850 depending on accessibility. Our crews coordinate dispatch from our Houston office and carry insulated flex, mastic, and collar hardware sized for the slab-foundation homes that dominate this market. Call (346) 423-3631 for a written estimate before any work starts.
We’ve worked inside Houston ductwork since 2013. The housing stock here tells its own story: late-1970s through 2000s suburban buildouts in Katy, Pearland, Sugar Land, and Clear Lake put flexible ductwork through unconditioned attics that still hit 140°F+ in July and August. Inside the Loop, retrofitted bungalows in The Heights and Montrose have convoluted runs that were never designed for forced air. Both scenarios end with the same phone call: rooms that won’t hold temperature, dust that returns within days of cleaning, or a musty note every time the blower cycles on. Our Duct Repair & Sealing team documents what we find with before-and-after photos of every run, then delivers a written price before touching a single panel.
Why CleanRun Air Duct Cleaning Spring Is Houston’s Preferred Duct Repair & Sealing Company
We’ve served 52,000+ homes since 2013, every one with a written price agreed before work began and a documented photo record delivered at completion. In Houston specifically, that record matters more than in most markets. Our crews know the difference between a Katy slab home off Mason Road with original 1980s flex runs and a Heights bungalow with retrofit metal ductwork threaded through a 1920s floor plan. That local knowledge keeps us from quoting blind.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The equipment on every truck includes Nikro negative-pressure extractors, Honeywell airflow meters, and Aprilaire media for post-repair filtration checks. Customers can verify each brand independently.
Every job is backed by the 365-Day Done Right Promise in writing, not as a policy subject to manager approval. If the sealing fails or a repaired run detaches, we make it right. We also offer a Free Second Opinion on any competitor’s written estimate - bring the quote, and we’ll put our number next to it.
Calls are answered by a live person, 24/7, and scheduling is coordinated from our Houston office for local dispatch.
Our Duct Repair & Sealing Services in Houston
Duct Sealing with Mastic Sealant
Houston’s 9-10 month AC season and Gulf-level dew points above 75°F mean flex duct joints in 140°F+ attics condense moisture every single day the system runs. Mastic sealant - a thick, fiber-reinforced compound brushed onto joints and collar connections - is the only method we trust for this climate. Tape dries and fails; mastic remains flexible and vapor-tight. A typical mastic sealing job for a Houston single-story slab home runs $450-$650, with two-story systems or complex retrofit layouts reaching $750-$850. We photograph every sealed joint before the mastic skins over, and we verify static pressure improvement at the air handler with a digital manometer.
Flex Duct Repair
Flex duct runs in unconditioned Houston attics routinely sag between trusses, crush at low points, or disconnect entirely at collars. The inner liner degrades from sustained heat exposure, and the insulation wrap compresses where the run hangs. We pulled registers in a 1980s Katy slab home off Mason Road and found the original flex runs sagging between trusses, disconnected at three collars behind the air handler, and a wet, microbial-stained low point where condensate had pooled for years. After camera inspection confirmed the crushed runs, we reattached and mastic-sealed every collar, replaced the wet sections with insulated flex, and verified static pressure at the blower motor afterward - the homeowner’s upstairs rooms finally matched the thermostat. Flex duct replacement in Houston typically runs $180-$340 per run depending on length and attic accessibility.
Metal Duct Repair
Older Houston homes, particularly inside-the-Loop bungalows in The Heights, Montrose, and Eastwood, often have galvanized metal ductwork from retrofit HVAC installations. These runs corrode at seams, separate at slip joints, and leak conditioned air into wall cavities or crawl spaces. Metal repair requires sheet metal patching, drive cleat replacement, or sectional replacement with new galvanized trunk line. Costs range from $220 for a localized seam repair to $580 for sectional trunk replacement in tight attic spaces. We photograph corrosion patterns and measure leakage with a Duct Blaster or equivalent before quoting.
Duct Insulation Replacement
When flex duct insulation becomes saturated from condensation or flood wicking, the R-value drops and exterior condensation worsens - a compounding problem in Houston’s humidity. We remove compromised insulation, inspect the inner liner for mold colonization, and re-wrap with new fiberglass insulation vapor-sealed with mastic. Insulation replacement for accessible runs runs $160-$280 per run; buried or routed-through-wall runs require additional access and run higher.
Air Leak Repair
Air leaks in Houston ductwork don’t just waste energy. They pull 140°F attic air, fiberglass particulate, and rodent droppings directly into the supply stream every time the blower creates negative pressure. We pressurize the system, locate leaks with smoke pencil or thermal imaging, then repair with mechanical fasteners and mastic. Whole-system leak repair and verification typically runs $380-$620 for Houston homes under 3,500 square feet.
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 trucks carry professional-grade equipment from Nikro, Honeywell, and Aprilaire - brands customers can research before we arrive. Nikro negative-pressure extractors handle debris removal during repair access; Honeywell airflow and static pressure meters verify system performance after sealing; Aprilaire media checks catch any residual particulate post-repair. We stock collar hardware, insulated flex, and mastic compounds sized for Houston’s dominant slab-foundation housing stock, which means most repairs don’t wait on parts. For specialized applications - flood-damaged under-slab ductwork in Meyerland, for instance - we source Abatement Technologies HEPA containment equipment to protect the living space during access and repair.
Common Duct Repair & Sealing Problems We See in Houston Homes
- Flex runs crushed or disconnected in 140°F+ attics. Houston’s unconditioned attic temperatures degrade flex duct inner liners and cause sagging between trusses. We find detached collars and crushed low points during routine camera inspections that were never visible from the register.
- Hurricane Harvey sediment still entrenched in flood-corridor ductwork. Technicians working Meyerland, Braeswood, and Brays Bayou-corridor neighborhoods routinely pull registers and find 2017 flood sediment and mold still in attic and under-slab duct sections. Homeowners dried floors and drywall but never addressed ductwork that wicked floodwater. It’s a known failure pattern specific to Houston’s most repeatedly flooded zip codes.
- Mold colonization at flex joints within days of moisture intrusion. Houston’s summer dew points regularly sit above 75°F - among the highest in the continental U.S. Any breach in a duct’s vapor barrier inside a hot attic creates immediate condensation, and systems that short-cycle or are oversized leave duct surfaces wet long enough for mold to colonize fast.
- Poor sealing in retrofitted inside-the-Loop bungalows. HVAC added to Heights and Montrose structures never designed for ductwork yields convoluted, hard-to-access runs with slipshod original sealing. Conditioned air leaks into wall cavities; attic air pulls into the return. The fix is patient, joint-by-joint mastic work with photographic documentation.
Pricing for Duct Repair & Sealing in Houston, TX
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts, every time. Here’s what duct repair and sealing costs in the Houston market:
| Service | Typical Range |
|---|---|
| Mastic sealing (whole system) | $450-$850 |
| Flex duct repair/replacement (per run) | $180-$340 |
| Metal duct seam/patch repair | $220-$580 |
| Duct insulation replacement (per run) | $160-$280 |
| Air leak detection and repair | $380-$620 |
| Post-flood duct access and remediation (Meyerland/Braeswood) | $520-$1,100 |
Factors that move a job within or above these ranges: attic accessibility (blown-in insulation, tight truss spacing), number of disconnected collars, presence of mold requiring containment, and whether the ductwork is original 1980s flex or newer material. We deliver the exact written price after camera inspection, never before. Estimates are free. Call (346) 423-3631 to schedule.
We Also Serve Cities Near Houston
Our crews work throughout the Houston metro, including Houston proper and the surrounding communities of Galena Park, Humble, Spring, and Tomball. Dispatch and scheduling are coordinated from our Houston office for local response times to all listed areas.
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 combination of 9-10 month AC operation, 75°F+ summer dew points, and 140°F+ attic temperatures creates condensation at flex joints every day the system runs, giving mold a foothold in days rather than weeks. Dallas and San Antonio see lower sustained humidity and shorter cooling seasons, so the same breach might take months to become visible. If you smell mustiness when the blower cycles, the colonization is likely already established. Call (346) 423-3631 for a camera inspection and written estimate.
Yes. We’ve worked in Heights, Montrose, and Eastwood bungalows where ductwork was retrofitted into structures never designed for it. The runs are often convoluted, partially buried in walls, or threaded between floor joists. We use flexible camera scopes and compact mastic application tools to access these spaces, and we photograph every sealed joint. Tight-access jobs run at the higher end of our ranges due to labor time, but the written price is agreed before we start. Call (346) 423-3631 to discuss your layout.
Pull a register and look, or better, let us camera-inspect. We’ve found Harvey sediment and mold in Meyerland, Braeswood, and Brays Bayou-corridor ductwork years after the event because homeowners addressed visible damage but not attic flex or under-slab runs that wicked floodwater. The camera shows the debris pattern definitively. If flood contamination is present, we contain the work area with Abatement Technologies HEPA equipment, remove compromised material, and document the repair with before-and-after photos. Call (346) 423-3631 for inspection.
Cleaning removes debris from intact ductwork. Repair and sealing fix the physical failures that let debris, attic air, and moisture enter in the first place: disconnected collars, crushed flex, corroded metal seams, and failed tape joints. In Houston’s climate, sealing is often the more important service because an unsealed system recontaminates within weeks of cleaning. We photograph the damage, deliver a written repair scope, and verify static pressure improvement after completion. Call (346) 423-3631 to schedule camera inspection.
We test with a digital manometer at the air handler before and after, measuring static pressure and airflow at each register. We also photograph every sealed joint while the mastic is still wet, creating a dated record of coverage. The 365-Day Done Right Promise covers any seal failure in writing - if a joint opens or a collar detaches, we return and correct it. Houston’s thermal expansion cycles are hard on ductwork; our documentation and warranty are designed for that reality. Call (346) 423-3631 with questions.
Ready to see what’s actually inside your ductwork? Call (346) 423-3631 for a free estimate. We’ll deliver a written price before any work starts, photograph every run before and after, and back the result with our 365-Day Done Right Promise.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Houston since 2013.