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 Jacinto City
Duct repair and sealing in Jacinto City typically runs $280-$650 for most homes, with full-system mastic sealing on a 1,200-square-foot bungalow landing in the $420-$580 range. For related services, see our Jacinto City Dryer Vent Cleaning. We dispatch crews to Jacinto City from our Houston office, and most repair calls are scheduled within 48 hours. Call (346) 248-1474 for a written estimate before any work starts.
We’ve been working in Jacinto City since 2013, and the pattern is consistent: the compact ranch homes and bungalows built here in the 1940s through 1960s carry duct systems that are decades past their design life. Original galvanized steel or early flex ductwork, deteriorating joints, and the unique burden of Houston Ship Channel industrial fallout create repair needs you won’t find in newer suburbs. Our Duct Repair & Sealing crews know what to look for in these older systems, and every job starts with a camera inspection and a written price.
Why CleanRun Air Duct Cleaning The Woodlands Is Jacinto City’s Preferred Duct Repair & Sealing Company
Jacinto City homeowners call us because we show what others only claim. Our technicians arrive in uniform, background-checked under Haven Standard Clause 3: Verified Crews, and identified by name before they reach your door. We’ve served over 52,000 homes since 2013, every one with a written price before work began and a Documented Photo Record delivered after.
The 365-Day Done Right Promise backs every job in writing, not as a verbal courtesy. If the sealing fails or a repaired joint separates, we return and make it right. Our Free Second Opinion policy means you can bring any competitor’s written estimate; we’ll put our number beside it, line item by line item.
Our crews carry professional-grade equipment from Rotobrush, Nikro, and Honeywell - brands you can verify independently. For Jacinto City specifically, we stock mastic compound, collar fittings, and flex duct sized for the smaller plenums common in postwar bungalows, so most repairs finish in a single visit without waiting on parts.
Our Duct Repair & Sealing Services in Jacinto City
Duct Sealing
Most Jacinto City homes we inspect have supply and return leaks at plenum collars, branch takeoffs, and register boots that have loosened over sixty-plus years of thermal cycling. Our sealing process pressurizes the system, pinpoints leakage with a calibrated manometer, then seals every accessible joint with mastic sealant rated for HVAC application. On a typical 1950s ranch near Market Street, this drops measured leakage from 25-35% to under 10%, which is the threshold where you’re paying to condition your attic or crawl space instead of your living space.
Flex Duct Repair
Early flex duct installed in Jacinto City’s 1960s-era homes has reached end of life. The plastic liner becomes brittle, the fiberglass insulation compresses, and the wire helix corrodes in Houston’s humidity. We replace crushed or torn runs with new R-6 or R-8 flex duct, properly supported at 4-foot intervals to prevent sagging, and seal every connection with nylon draw bands and mastic. A full flex replacement on a small Jacinto City bungalow typically runs $340-$520.
Metal Duct Repair
Galvanized steel ductwork from the 1940s and 1950s rusts at seams, separates at drive cleats, and leaks through pinholes where the zinc coating has failed. We patch isolated damage with galvanized sheet metal and sealant, replace severely corroded sections with new snap-lock pipe, and reinforce joints with S-clips and mastic. Where original ductwork is structurally sound but leaking, repair and sealing costs less than half of full replacement.
Duct Insulation
Jacinto City’s low-lying position in Harris County’s flood plain means humidity finds every gap. Uninsulated or water-damaged duct insulation in attics and crawl spaces condenses moisture that breeds mold and rots surrounding structure. We install new foil-faced fiberglass insulation or closed-cell foam wrap on repaired runs, with vapor barriers sealed at every seam. This is particularly critical for homes that took flood moisture during Hurricane Harvey and never had ducts professionally assessed.
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 Jacinto City
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation inside duct runs, Nikro HEPA-filtered negative-pressure extractors for source removal, and Honeywell media filters and whole-house air cleaners we install when the existing filtration is inadequate for Ship Channel conditions. We stock replacement collars, dampers, and register boots sized for the smaller duct systems common in Jacinto City’s older homes, which means most repairs don’t wait on a parts run.
Common Duct Repair & Sealing Problems We See in Jacinto City Homes
- Original galvanized ductwork separating at joints. The postwar bungalows near Jacinto City Elementary and along Mercury Drive still run duct systems installed when Eisenhower was president. Drive cleats rust through, seams gap, and the plenum pulls attic air laced with industrial particulate straight into your supply.
- Harvey flood moisture trapped in flex duct and insulation. Many homes in this flood-plain city took water in 2017. Duct insulation that got wet and was never removed became a mold incubation site. We find active fungal growth in flex runs seven years later, pumping spores through registers every time the blower cycles.
- “Ship-channel black” masking failing seams. The heavy, dark industrial fallout technicians find in Jacinto City ducts behaves differently from mid-Houston dust. It packs into seams and cushions disconnected collars, so the leak doesn’t read as a comfort complaint - just a house that “gets dusty fast.”
- Undersized ductwork creating static pressure failures. 1940s and 1950s homes were designed for smaller equipment and lower airflow. Modern replacement HVAC systems often exceed the original duct capacity, causing flex to balloon and burst at weak points or metal seams to whistle and separate.
Pricing for Duct Repair & Sealing in Jacinto City, TX
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts. Here’s what duct repair and sealing costs in Jacinto City’s market:
| Service | Typical Range in Jacinto City |
|---|---|
| Mastic sealing, full system (up to 8 runs) | $420-$580 |
| Flex duct repair / replacement (per run) | $180-$290 |
| Metal duct patch and seal (localized) | $280-$420 |
| Plenum collar rebuild | $240-$360 |
| Duct insulation replacement (per run) | $160-$250 |
| Full system inspection with photo documentation | Included with any repair |
Factors that move the number: accessibility (crawl space vs. attic), extent of corrosion or mold damage requiring remediation before sealing, and whether the system needs rebalancing after repair. Every estimate is free, delivered in writing, and valid for 30 days. Call (346) 248-1474 to schedule.
We Also Serve Cities Near Jacinto City
Our crews work throughout the northern Houston metro, including Duct Repair & Sealing in Jacinto City as well as The Woodlands, Tomball, Conroe, and Spring. Scheduling and dispatch are coordinated from our Houston office, with local routing that keeps Jacinto City appointments within our standard 48-hour window.
Serving Jacinto City, TX - Our Local Coverage Area
We’re based in the Jacinto City 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 Jacinto City
Jacinto City’s immediate adjacency to the Houston Ship Channel petrochemical corridor exposes homes to industrial particulate, chemical dusts, and refinery fallout that don’t reach neighborhoods even ten miles west. Technicians call the deposit “ship-channel black” - a heavy, dark accumulation that packs into seams and masks failing joints. The particulate behaves differently from typical household dust; it’s denser, more oily, and resists standard vacuuming. Source removal with rotary mechanical agitation and HEPA-filtered negative-pressure extraction is required to dislodge it, followed by sealing to prevent immediate re-accumulation through leaks. Call (346) 248-1474 for an inspection and written estimate.
Some can, some can’t; it depends on what got wet and for how long. Metal ductwork that took brief moisture and dried quickly often survives with inspection, cleaning, and resealing. Flex duct and fiberglass insulation that got submerged typically must be removed - the material traps moisture that feeds mold for years. We’ve found active fungal growth in Harvey-affected Jacinto City homes in 2024, seven years after the event, because no professional ever assessed the ductwork. Our process: camera inspection, moisture measurement, documented photo record of what we find, then a written scope that separates salvageable metal from compromised flex. Call (346) 248-1474 for a free Harvey-damage assessment.
Camera inspection, pressure testing, and knowledge of how these homes were built. The 1940s-1960s bungalows in Jacinto City typically have a central plenum with short branch runs; when a run is crushed or disconnected, the symptom is often uneven heating or a room that “never gets comfortable” rather than obvious airflow. We pressurize the system and measure static pressure at the air handler, then run a lighted camera through each branch to locate the failure. On that 1950s bungalow off Market Street near Jacinto City Elementary, our crew found a return drop separated at the collar behind the air handler - the dark Ship Channel fallout had cushioned the joint so the leak never showed up as a comfort complaint until we looked. Source removal, collar rebuild, mastic sealing, and register rebalancing fixed it. Call (346) 248-1474 to schedule camera diagnostics.
Yes, but only if the sealing is comprehensive and the system is cleaned first. Sealing a duct system that’s packed with existing industrial fallout traps that material inside - the right sequence is source removal, then sealing. Once sealed, a properly tightened system pulls conditioned air from your living space through the return, not unfiltered attic or crawl space air laced with Ship Channel particulate. We’ve documented 40-60% reduction in airborne particle counts post-sealing in Jacinto City homes, measured with calibrated particle counters as part of our standard deliverable. The 365-Day Done Right Promise covers re-sealing if leakage recedes above 15%. Call (346) 248-1474 for a pressure-test baseline and written scope.
MERV 11 for standard systems, MERV 13 if your blower can handle the static pressure - but never higher without verifying your system’s capacity. The dense industrial fallout in Jacinto City justifies tighter filtration than in cleaner-air suburbs, but a MERV 13 filter in an undersized 1950s return plenum can starve the blower and crack the heat exchanger. We measure static pressure across the filter rack before recommending an upgrade. For homes with compromised ductwork, sealing comes first; a tight system with MERV 11 outperforms a leaky system with MERV 13 because the filter can’t catch what enters through gaps. Honeywell and Aprilaire media filters are what we typically install post-sealing. Call (346) 248-1474 for a filtration assessment with your repair estimate.
Ready to stop conditioning your attic and start breathing cleaner air? Call (346) 248-1474 for a free, written estimate on duct repair and sealing in Jacinto City. Every quote includes a camera inspection, documented photo record, and our price locked before any work begins.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning The Woodlands, serving Jacinto City since 2013.