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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Repair & Sealing Across Missouri City
Most duct repair and sealing jobs in Missouri City run $280-$650 for a standard residential system, with full flex duct replacement reaching $1,200-$2,400 depending on attic access and run length. We dispatch crews to Missouri City from our Houston coordination office, and we typically schedule within 3-5 business days - enough time to source any specialty materials, but not so long that you’re living with a compromised system. Call (346) 421-3357 for a written estimate.
We’ve worked in Missouri City homes since 2013, and the pattern is unmistakable. The master-planned communities that define this market - Sienna Plantation, Lake Olympia, Colony Meadows - were built during a concentrated wave of construction from the late 1990s through the late 2000s. Those homes are now hitting the 20-30 year mark, and their attic-mounted flex duct systems are showing the accumulated damage of Houston-area summers where attic temperatures routinely exceed 140°F. That’s not a theoretical concern. It’s what we photograph on every job.
Our Duct Repair & Sealing team serves Missouri City under the H.A.V.E.N. Standard, which means background-checked, uniformed technicians identified by name before arrival, a written price before any work starts, and a Documented Photo Record of every duct run delivered as a standard job record.
Why CleanRun Air Duct Cleaning Sugar Land Is Missouri City’s Preferred Duct Repair & Sealing Company
We’ve completed work in more than 52,000 homes since 2013, and a significant concentration of those jobs has been in Fort Bend County. Missouri City customers specifically have left documented feedback citing our photo records as the reason they chose us over competitors - they could see the gap between marketing claims and actual results. We don’t ask for trust. We deliver evidence.
Response time to Missouri City is coordinated from our Houston office, with crews carrying Rotobrush and Nikro equipment stocked for common flex duct and metal duct repairs. We know the local housing stock: the two-story layouts prevalent in Sienna Plantation produce long, branching flex duct runs that require more access points than single-story systems, and the older Quail Valley homes may be on original duct systems well past the 20-25 year service life. That knowledge changes how we quote and how we schedule.
Every job is backed by the 365-Day Done Right Promise, a written guarantee, not a policy subject to manager approval. Haven Standard Clause 1 requires a written price before any work starts - no exceptions.
Our Duct Repair & Sealing Services in Missouri City
Duct Sealing
Unsealed duct joints in Missouri City’s attic-mounted flex systems are among the most common findings on our inspections. A typical duct sealing job in Missouri City runs $280-$450 for a standard single-system home, using mastic sealant applied to all accessible joints, plenum connections, and register boots. In Sienna Plantation homes with long branching runs, we often find five to eight unsealed joints per system, each leaking conditioned air into the attic. We photograph every joint before and after sealing. The customer receives the photo record as part of the standard job deliverable.
Flex Duct Repair
Missouri City’s 140°F+ attic temperatures degrade flex duct liner faster than in conditioned spaces. We regularly find collapsed, torn, or disconnected flex duct in homes throughout Lake Olympia and Colony Meadows, particularly where long runs sag between support points. Flex duct repair or replacement in Missouri City typically runs $180-$340 per run, with full system replacement at the higher end. We use Guardsman-supported repair methods and photograph the interior condition before any replacement decision. The camera doesn’t lie about liner degradation.
Metal Duct Repair
Older Missouri City homes, particularly in Quail Valley and some pre-1990s pockets, may have galvanized metal ductwork. Rust at seams, separated joints, and failed sealant are standard findings. Metal duct repair runs $320-$580 depending on accessibility and extent of corrosion. We don’t replace metal duct that can be properly repaired and resealed - the photo record shows you which category your system falls into.
Duct Insulation
Missing or degraded duct insulation in Missouri City attics forces your AC to work harder for longer. Given that Missouri City systems run eight to nine months annually, that’s a real cost. Duct insulation replacement or augmentation runs $240-$480 for a typical system. We specify the R-value improvement in writing before work starts.
Air Leak Repair & Mastic Sealant
Air leak repair using mastic sealant - not tape, which fails in attic heat - is our standard approach for Missouri City homes. Mastic remains flexible across temperature extremes and creates a permanent seal. We apply it to all accessible joints and photograph the application. This is core to our Duct Repair & Sealing in Missouri City work.
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.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Missouri City
Our equipment roster includes Rotobrush, Nikro, and Honeywell systems - brands any customer can look up independently to verify specifications. We stock common flex duct diameters, mastic sealant, and register boots for Missouri City jobs, which means most repairs don’t require a return visit for materials. For specialty components in Sienna Plantation’s larger homes or Quail Valley’s older systems, we source overnight and schedule completion within 48 hours. The technician who quotes the job names the specific equipment and materials on the written scope. No generic “professional equipment” claims - named tools, documented in writing.
Common Duct Repair & Sealing Problems We See in Missouri City Homes
- Construction debris in new home ductwork. In Missouri City, newly built homes in Sienna Plantation and other master-planned communities often need duct cleaning and sealing within the first year because construction dust and drywall debris remain in the supply and return ducts after handover. The builder’s HVAC startup typically doesn’t include source removal.
- Unsealed joints in attic flex duct systems. Improperly sealed duct joints in attic-mounted flex duct systems cause significant air leakage and energy waste. We find this in both new construction and 20-year-old systems - the age of the home doesn’t predict joint quality.
- Flex duct liner degradation from extreme attic heat. Missouri City’s summer attic temperatures regularly surpass 140°F, accelerating flex duct liner breakdown and ensuring that any moisture intrusion quickly promotes microbial growth inside duct lining before homeowners notice symptoms.
- Moisture and mold from Hurricane Harvey legacy. In subdivisions near Oyster Creek’s floodplain, including portions of Quail Valley and Lake Olympia, Harvey floodwaters entered homes through low-set floor vents and return-air grilles. We regularly uncover active mold colonies inside flex duct runs of homes whose visible water damage was repaired years ago but whose attic ductwork was never inspected.
Pricing for Duct Repair & Sealing in Missouri City, TX
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts - and that price should never be a surprise.
| Service | Typical Range in Missouri City |
|---|---|
| Duct sealing (mastic, standard system) | $280-$450 |
| Flex duct repair (per run) | $180-$340 |
| Full flex duct replacement (single system) | $1,200-$2,400 |
| Metal duct repair | $320-$580 |
| Duct insulation replacement | $240-$480 |
| Air leak repair with mastic sealant | $280-$520 |
What moves a quote within these ranges: attic accessibility (blown insulation adds time), number of duct runs, extent of liner degradation, and whether mold remediation is required before sealing. Every quote includes the Documented Photo Record at no additional cost. We also offer a Free Second Opinion on any written estimate - bring a competitor’s quote and we’ll put our number next to it in writing.
Call (346) 421-3357 for a written estimate. Estimates are free.
We Also Serve Cities Near Missouri City
Our crews work throughout Fort Bend and Harris Counties, including Stafford, Sugar Land, Fresno, and Bellaire. Scheduling and dispatch are coordinated from our Houston office, with local crews serving each area. The same H.A.V.E.N. Standard, written pricing, and photo documentation apply in every city we serve.
Serving Missouri City, TX - Our Local Coverage Area
We’re based in the Missouri 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 Missouri City
Construction dust and drywall debris typically remain in supply and return ducts after builder handover, unlike in older homes where duct issues stem from age-related degradation. The builder’s HVAC startup test confirms airflow, not cleanliness. We recently serviced a new home in Sienna Plantation where the homeowners complained of excessive dust and higher energy bills. Our camera inspection revealed drywall dust and construction debris coating the interior of the flex ducts, and we also found several unsealed joints in the attic. After performing source removal with HEPA filtration and sealing the leaks with mastic, the system airflow improved and the dust issue was resolved. Call (346) 421-3357 for an inspection - estimates are free.
Excessive dust on surfaces shortly after cleaning, reduced airflow at registers, or a visible debris plume when the system first cycles on are common indicators. The only definitive method is a camera inspection of the duct interior, which we perform and document with before-and-after photos on every job. If your home was built in Sienna Plantation, Lake Olympia, or Colony Meadows within the past five years, construction debris is a higher probability finding than in the general housing stock. Call (346) 421-3357 to schedule.
Builders should have installed temporary duct protection during drywall installation and rough construction, then performed source removal with negative-pressure extraction (a vacuum system that pulls debris out while preventing it from entering living spaces) before final HVAC startup. Most Missouri City builders do neither. The result is debris that circulates through your home for years, accelerating filter loading and depositing particulate on coils and blower components. We document what we find and what should have been done, in writing, as part of every job record.
Yes. Sealing duct leaks prevents your AC system from pulling humid attic air into the conditioned space, which is a significant humidity source in Missouri City’s Gulf Coast climate where relative humidity routinely exceeds 70% year-round. Unsealed return ducts are particularly problematic - they create negative pressure that draws hot, humid attic air directly into your system. After sealing, we measure and document the reduction in system runtime required to maintain setpoint. Call (346) 421-3357 for a written estimate on sealing.
Newer Missouri City homes should receive an initial inspection and cleaning within the first 12-18 months after construction to remove builder debris, with sealing performed at that time if joints are found unsealed. After that, a 3-5 year interval is typical for cleaning, with sealing re-evaluated at each service. Homes in flood-impacted areas, including portions of Quail Valley and Lake Olympia near Oyster Creek, may need more frequent inspection due to moisture history. The 365-Day Done Right Promise covers our sealing work for a full year - if a sealed joint fails, we make it right in writing.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Missouri City since 2013.