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 Flower Mound
Duct repair and sealing in Flower Mound typically runs $280-$680 for most single-system homes, with multi-zone two-story properties running $450-$950 depending on access and the extent of flex-duct degradation. Our crews are dispatched from the Dallas-Fort Worth office and carry mastic sealant, flex-duct replacement stock, and camera inspection gear sized for Flower Mound’s 2,800-4,500 sq ft homes. Call (469) 452-7766 and we’ll put a written price in front of you before any panel comes off.
We’ve worked the master-planned sections near the Mound, the corridors along FM 2499, and the neighborhoods backing up to Grapevine Lake. Flower Mound’s housing stock is distinctive: a concentrated 1990s-2008 building boom produced large two-story homes with extensive flex-duct runs through hot attics, and that ductwork is now 20-30 years old. The town’s aggressive tree preservation ordinance - Eastern red cedars, cedar elms, and post oaks on nearly every street - pushes a heavier biological load into aging systems than you’ll find in neighboring Lewisville or Coppell. We know what that combination looks like inside a plenum. Our Duct Repair & Sealing team documents every run with before-and-after photography, delivered as part of the standard job record.
Why CleanRun Air Duct Cleaning Plano Is Flower Mound’s Preferred Duct Repair & Sealing Company
We’ve served Flower Mound homeowners since adding the area to our Dallas-Fort Worth coverage in 2013, and the documented photo records from those jobs now number in the thousands. Reviews from Flower Mound customers consistently cite two things: the written price that arrived before work started, and the photo evidence they could show their spouse afterward. Haven Standard Clause 1 - Written Price Before Any Work Starts - applies on every call, no exceptions.
Response time to Flower Mound averages same-week scheduling, with dispatch coordinated from our Dallas-Fort Worth office. Technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. They carry professional-grade equipment from Nikro, Honeywell, and Abatement Technologies - brands you can look up before we arrive.
Local knowledge matters here. Flower Mound’s tree canopy isn’t decorative; it’s a mechanical factor. Mountain cedar season runs December through February, followed by an oak and cedar-elm surge in spring that pushes pollen and mold spores into return systems through gaps that wouldn’t register in a cleaner debris environment. Our crews know to inspect floor-level return-air boots first in this town. The residue profile is different.
Our Duct Repair & Sealing Services in Flower Mound
Mastic Sealant Application
Mastic is a water-based sealant we brush onto metal duct joints, plenum connections, and register boots - it stays flexible after curing, unlike tape that dries and cracks in Flower Mound’s attic heat. A typical mastic sealing job for a single-zone system in Flower Mound runs $280-$420. We apply it after camera inspection confirms where the leaks are, not as a blind coating. In homes near the Mound, we often find mastic is the right repair where original builder-grade tape has failed at plenum takeoffs after two decades of thermal cycling.
Flex Duct Repair
Flex duct - the insulated flexible tubing that connects plenums to registers - degrades predictably in Flower Mound’s unconditioned attics. Outer jackets show heat and UV damage after 20+ years at attic temperatures exceeding 150°F in July. We cut out compromised sections, install new flex with mechanical fasteners and mastic, and re-insulate to R-6 or better. Typical flex-duct repair in Flower Mound runs $180-$340 per run, with whole-system replacement on a three-zone home reaching $680-$950. We only replace what inspection shows is necessary; the camera tells the story before we touch a tool.
Metal Duct Repair
Older Flower Mound homes and some custom builds use galvanized steel ductwork. We repair separated seams, corroded sections, and damaged dampers. Metal work runs $220-$480 depending on access and whether we can reach the section from the attic or need to create a temporary access panel. Every repair is photographed, and any panel we open is sealed and finished to match.
Air Leak Repair
Unfiltered air bypassing the return system is common in Flower Mound’s aging flex-duct installations. Partial separations at plenum connections pull attic air - carrying clay dust, pollen, and insulation particles - straight into the airflow without passing through the filter. We pressure-test the system, locate leaks with smoke pencil and camera, and seal them with mastic or mechanical repair. Air leak repair typically runs $260-$520 for a Flower Mound home with two to three zones.
Duct Insulation
Where flex-duct insulation has compressed or degraded in hot attics, we re-wrap or replace to restore thermal barrier performance. Poorly insulated ducts in Flower Mound’s July conditions can deliver air 8-12 degrees warmer than designed, forcing the compressor to run longer. Insulation repair runs $200-$380 per run.
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 Flower Mound
Our equipment roster includes Nikro negative-pressure extractors, Honeywell media air cleaners, and Abatement Technologies HEPA filtration - tools we name so you can verify specifications before agreeing to a price. We stock flex-duct, mastic, and mechanical fasteners sized for the large-format systems common in Flower Mound’s 1990s-2000s production builds, which means most repairs don’t wait on parts. If your system includes Aprilaire whole-home purifiers or Honeywell electronic air cleaners, we service those components as part of the ductwork scope and document their condition in the photo record.
Common Duct Repair & Sealing Problems We See in Flower Mound Homes
- Heat-degraded flex-duct jackets in 150°F attics. Flower Mound’s two-story homes from the 1990s-2000s building boom run flex duct through unconditioned attic spaces that exceed 150°F in July. The outer jacket becomes brittle, the insulation compresses, and partial separations develop at plenum connections - allowing unfiltered attic air to bypass the return system entirely.
- Return-air boots packed with cedar-elm litter and black clay dust. The combination of Flower Mound’s mandated tree canopy and Blackland Prairie fringe soils produces a distinctive debris profile. Floor-level return boots in older sections near the Mound regularly contain decomposed organic matter mixed with fine clay particulate that restricts airflow and loads the blower motor.
- Shared dryer vent stacks in condos and townhomes. Flower Mound’s 1990s-2000s multi-family construction often routes dryer exhaust through shared vertical stacks. Lint accumulates behind the trap through the full run, creating a fire pathway that only camera inspection reveals. We coordinate access with building management and document the full stack.
- Plenum separations from thermal cycling. Twenty years of summer heat and winter cold in Flower Mound’s vented attics loosens mechanical connections at the air handler plenum. The gap is often small - a quarter-inch - but it pulls continuous unfiltered air, raising particle counts and energy bills.
Pricing for Duct Repair & Sealing in Flower Mound, TX
We publish ranges because Haven Standard Clause 1 requires a written price before work starts, and that price should never be a surprise.
| Service | Typical Range in Flower Mound |
|---|---|
| Mastic sealant (single zone) | $280-$420 |
| Flex duct repair (per run) | $180-$340 |
| Whole-system flex replacement (3-zone home) | $680-$950 |
| Metal duct repair | $220-$480 |
| Air leak detection and sealing | $260-$520 |
| Duct insulation repair (per run) | $200-$380 |
What moves the number: attic access difficulty, number of zones, extent of degradation found on camera inspection, and whether we can reach the repair point from existing access or need to create one. We don’t quote per-vent or per-square-foot - one flat price per system, agreed in writing before work starts. Every estimate includes the documented photo record at no additional charge. Bring a competitor’s written quote; our Free Second Opinion puts our number next to it, also in writing.
We Also Serve Cities Near Flower Mound
Our crews work Flower Mound regularly and also handle duct repair and sealing in Lewisville, Carrollton, Frisco, and Richardson. Dispatch is coordinated from our Dallas-Fort Worth office. The debris profile changes as you move north into Denton County’s sandier soils - we adjust inspection protocol accordingly.
Serving Flower Mound, TX - Our Local Coverage Area
We’re based in the Flower Mound 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 Flower Mound
Homes built 1992-2008 in those sections have flex-duct systems now 20-30 years old, with original plenum connections that have thermally cycled through two decades of 150°F July attics. Newer builds use tighter duct construction and often locate mechanicals in conditioned space. The older stock near the Mound simply has more separation points, more degradation, and more unfiltered bypass. Call (469) 452-7766 for a camera inspection and written estimate - estimates are free.
Yes. The city’s mandated preservation of Eastern red cedars, cedar elms, and post oaks produces pollen and mold-spore loads heavier than in neighboring Lewisville or Coppell, particularly December through February (mountain cedar) and spring (oak/cedar elm surge). That biological material enters through gaps in aging ductwork and decomposes inside, creating a residue that camera inspection reveals as distinct from the drier, sandier debris found in Denton County systems just miles north. Call (469) 452-7766 for an inspection - estimates are free.
We coordinate with property management for access to shared mechanical rooms and stack locations, inspect with camera from accessible points, and document findings for both the resident and the building owner. Shared dryer vent stacks in 1990s-2000s Flower Mound townhomes often require building-wide coordination; we schedule to minimize disruption and provide the photo record to all parties. Call (469) 452-7766 to discuss your building’s specific access - estimates are free.
We start with camera inspection from the air handler through each zone, identify separation points and degradation, then deliver a written scope and price before any repair begins. For a typical three-zone home, we’ll seal plenum connections with mastic, repair or replace degraded flex runs, pressure-test the system, and run negative-pressure HEPA extraction if source removal is needed. The visit concludes with before-and-after photos of every run, delivered as your documented photo record. Call (469) 452-7766 to schedule - estimates are free.
Flower Mound sits on the Blackland Prairie fringe, where heavy clay soils generate fine particulate dust during summer dry spells and high-wind events. Combined with the town’s dense tree canopy, that produces a debris profile of decomposed organic matter (cedar-elm leaf litter, pollen residue) mixed with black clay dust. Denton County’s sandier soils generate drier, lighter particulate with less organic loading. We adjust our extraction approach and filter selection based on what the camera shows. Call (469) 452-7766 for an inspection that identifies your home’s specific profile - estimates are free.
What to Expect From Your CleanRun Visit
- Live person answers your call, 24/7
- Technician identified by name before arrival; background-checked, uniformed
- Camera inspection with real-time display
- Written price delivered before any work starts - Haven Standard Clause 1
- Repair completed with Nikro, Honeywell, or Abatement Technologies equipment as specified
- Documented Photo Record of every duct run, before and after, included standard
- 365-Day Done Right Promise in writing on every job
A crew working the older master-planned sections near the Mound found a 2001 two-story with three zones where the supply boots in the primary bedroom were packed with decomposed cedar-elm leaf litter and black clay dust, while the flex duct in the July attic - well past 150°F - had outer jackets showing heat and UV degradation. We ran camera inspection from the air handler, cut out two separated plenum connections, sealed them with mastic, and re-insulated the compromised flex runs before pulling the system under negative pressure with HEPA filtration for source removal. The customer received the photo record showing every stage.
Contact CleanRun for Duct Repair & Sealing in Flower Mound
Call (469) 452-7766. A live person will answer, schedule your inspection, and put a technician on your Flower Mound property with camera gear, mastic, flex-duct stock, and the written pricing protocol we’ve used on 52,000+ homes since 2013. Your estimate is free. Your price, once written, is locked. And every repair we make is backed by the 365-Day Done Right Promise - in writing, not as a policy subject to manager approval.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Flower Mound since 2013.