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 Southlake
Duct repair and sealing in Southlake typically runs $400-$1,800 depending on system count and accessibility, with most jobs scheduled within three to five business days. CleanRun crews coordinate dispatch from our Dallas-Fort Worth office and carry the equipment to handle Southlake’s uniquely large homes on the first visit.
We’ve been working in Southlake since 2013. We know the difference between a 2,200-square-foot Keller ranch and a 5,500-square-foot Timarron home with four separate attic air handlers. The ductwork in these larger homes isn’t just longer. It’s more complex, more stressed by North Texas clay soils, and more likely to harbor problems that don’t show up at the register until they’ve been pulling attic air into bedrooms for years. Our Duct Repair & Sealing team arrives with Rotobrush inspection cameras, mastic sealant, and replacement flex duct sized for the job - not whatever’s left on the truck from the last call.
Call (940) 240-8552 for a written estimate. We deliver the price before any panel comes off, and every repair concludes with a Documented Photo Record of every run we touched.
Why CleanRun Air Duct Cleaning Lewisville Is Southlake’s Preferred Duct Repair & Sealing Company
CleanRun has served more than 52,000 homes since 2013, and Southlake’s luxury market has been a significant share of our duct repair work. Homeowners here research before they call. They ask about license numbers, equipment brands, and what documentation they’ll receive. We answer with specifics: our technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, we publish our license number on every estimate, and we use professional-grade equipment from Rotobrush, Nikro, and Honeywell that customers can verify independently.
Our reputation in Southlake is built on documentation, not promises. Every job starts with a written price and ends with before-and-after photos inside every duct run. The 365-Day Done Right Promise is printed on the work order, not buried in a footer. If the repair fails, we make it right - no manager approval required.
Scheduling to Southlake is coordinated from our Dallas-Fort Worth office, with crews carrying inventory for the multi-system homes common here. We’re familiar with the access challenges of gated communities like Timarron and the larger lots near Southlake Town Square, where attic entry points can be spread across 6,000 square feet of conditioned space.
We also offer a Free Second Opinion on any written estimate from a competitor. Bring us the quote; we’ll put our number next to it in writing.
Our Duct Repair & Sealing Services in Southlake
Duct Sealing
Most Southlake homes lose 20-30% of conditioned air through leaks at joints, plenum connections, and register boots. Our sealing process starts with pressure testing to quantify the loss, then targets each leak with mastic sealant or metal-backed tape rated for the temperature cycling these systems endure. For the large homes common in Southlake - many with three to five separate systems - we seal every accessible joint and provide a post-repair pressure test showing the improvement. Haven Standard Clause 1 requires the written price before work starts; Clause 4 requires the photo record after.
Flex Duct Repair
Flex duct is the weak link in Southlake’s 1990s-2000s luxury homes. The original installations are now 20-30 years old, and North Texas’s expansive clay soils have been shifting foundations seasonally since the day the HVAC contractor left. We regularly find partially disconnected flex duct joints at attic plenums in otherwise pristine homes - gaps that pull 140-degree attic air and blown-in insulation fibers into supply runs. Our crews carry replacement flex duct in standard diameters, reconnect collars with mechanical fasteners (not tape alone), and wrap with fresh duct insulation before pressure testing.
Metal Duct Repair
Some Southlake homes, particularly custom builds from the early 2000s, used galvanized metal trunk lines with flex duct branches. Metal ducts don’t degrade like flex, but their seams and joints are susceptible to corrosion in humid attics, and vibration from multi-system setups can loosen connections over time. We repair metal duct with proper sheet-metal patches, seal with mastic, and reinforce at stress points. Where metal has failed completely, we’ll recommend replacement options with written pricing for each.
Duct Insulation
Uninsulated or degraded duct insulation in Southlake attics is a direct energy loss. Attic temperatures here exceed 130°F in July and August, and uninsulated supply lines dump that heat load back into the system. We install new fiberglass duct insulation with vapor barriers, properly sealed at all seams, for homes where the original wrapping has compressed, torn, or been disturbed by wildlife. For multi-system homes, the linear footage adds up quickly - another reason Southlake jobs run larger than neighboring markets.
Mastic Sealant Application
Mastic is the standard for durable duct sealing, and we apply it by brush at every joint, seam, and penetration. Unlike foil tape, mastic remains flexible through decades of thermal cycling and doesn’t degrade under UV exposure in attic environments. For Southlake homes with original fiberglass duct board from the 1990s build boom, mastic is often the only viable sealing option - the board itself degrades and sheds fibers, but mastic can encapsulate and stabilize it where replacement isn’t yet warranted.
Air Leak Repair
Air leaks in Southlake homes fall into two categories: visible gaps at registers and plenums, and hidden failures in attic runs that only show up on camera inspection. We address both. The visible ones are sealed and tested. The hidden ones - the disconnected flex joints, the separated collar connections, the degraded tape - are documented with before photos, repaired, and verified with after photos and pressure testing. The customer receives the full photo record as a standard deliverable.
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 Southlake
CleanRun technicians work with professional-grade equipment from Rotobrush, Honeywell, and Guardsman - brands that publish specifications customers can verify. Our Southlake crews carry Rotobrush inspection cameras for documenting conditions inside duct runs, Honeywell media filters for replacement when existing filters have failed under pollen load, and Guardsman sealants rated for the temperature ranges these attics reach. We stock common flex duct diameters and insulation wraps locally, so repairs on Southlake’s larger homes don’t stretch across multiple visits. Every tool and material is named on the written estimate before work begins.
Common Duct Repair & Sealing Problems We See in Southlake Homes
- Flex duct joints separate at attic plenums. North Texas clay soils expand and contract with seasonal moisture changes, shifting foundations and the framing they support. In Southlake’s large homes, this movement translates to partially disconnected flex duct collars at attic air handlers - gaps that draw raw attic air, insulation fibers, and summer heat directly into supply runs. The register still blows, so homeowners don’t notice until dust streaks appear on ceilings or allergy symptoms spike.
- Original fiberglass duct board degrades and sheds fibers. The 1990s-2000s build boom in Southlake installed millions of linear feet of fiberglass duct board in attics that are rarely accessed. After 20-30 years, the board’s interior surface degrades, releasing fibers into airflow. Camera inspection reveals the damage; mastic encapsulation or replacement resolves it.
- Mountain cedar pollen overloads filters and deposits biofilms. December through February, Ashe juniper pollen concentrations in North Texas rank among the highest in the country. Sticky pollen particles pass compromised filters, adhere to duct interiors, and create biofilm buildup that accelerates seal failure at joints and seams. Homes with three to five systems have three to five times the filter area to monitor and replace.
- Long attic runs create moisture intrusion points. Southlake’s multi-story luxury homes route ductwork through extensive attic spaces where summer humidity and winter condensation create microclimates. Insulation failures at low points in long runs allow condensation to collect, degrading tape seals and promoting mold growth that spreads when the system cycles on.
Pricing for Duct Repair & Sealing in Southlake, TX
Duct sealing for a single system in Southlake typically runs $400-$700. Multi-system homes with three to five units range $1,200-$1,800, reflecting the additional linear footage, access points, and testing time. Flex duct repair for a single damaged run runs $250-$450; metal duct patch repair starts at $300 and scales with accessibility. Duct insulation replacement is priced by linear foot, with most Southlake homes falling in the $600-$1,200 range for partial re-insulation of degraded sections.
These are whole-system prices, not per-vent teaser rates. Every estimate is delivered in writing before work starts under Haven Standard Clause 1. The price covers the repair, the pressure testing, and the Documented Photo Record - no additional line items added once the crew is on site.
Call (940) 240-8552 for a free estimate. We’ll inspect the system, identify the failures, and deliver a written price you can compare against any competitor’s quote.
We Also Serve Cities Near Southlake
CleanRun crews based from our Dallas-Fort Worth office also handle Duct Repair & Sealing in Southlake and surrounding communities including Grapevine, Flower Mound, North Richland Hills, and Lewisville. Each market has distinct housing stock and ductwork characteristics; our estimates reflect local conditions, not template pricing.
Serving Southlake, TX - Our Local Coverage Area
We’re based in the Southlake 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 Southlake
Every three to five years for homes with standard filtration, and every two to three years for properties backing open land or during heavy construction periods. Southlake’s larger homes with 3-5 systems accumulate debris faster across more linear footage, and the December-February mountain cedar pollen season deposits sticky residue that degrades seals. Call (940) 240-8552 and we’ll inspect your system and recommend an interval based on what the camera shows.
North Texas expansive clay soils shift foundations seasonally, and that movement transmits to attic framing and HVAC platforms. Flex duct collars - secured with tape or inadequate mechanical fasteners - separate under this stress. We reconnect with proper mechanical fasteners, apply mastic sealant, and wrap with fresh insulation; the repair holds because we address the connection method, not just the symptom.
Yes. The December-February Ashe juniper pollen surge pushes sticky, high-concentration particulate through forced-air systems. It overloads filters, bypasses compromised seals, and deposits biofilms that accelerate joint degradation. Sealed ductwork with intact filters handles this load; leaky systems distribute pollen throughout the home and degrade faster. Winter is the worst season to defer sealing work in Southlake.
Multiple systems mean multiple attic air handlers, multiple plenums, and significantly more linear footage to inspect and test. A typical Southlake job involves pressure testing each system independently, documenting failures with camera inspection, and sealing or repairing each run. The scope is larger than single-system homes in Keller or Grapevine, but the process is identical: written price first, repair, then photo-verified results. We were called to a 6,800-square-foot home in the Timarron area where the homeowner complained of dust streaks on the ceiling near the master-suite registers. Camera inspection showed a partially disconnected flex duct joint at the attic plenum - likely shifted by North Texas clay-soil movement - pulling blown-in insulation fibers into the supply run. We reconnected the collar, applied mastic sealant, and wrapped the joint with new duct insulation; post-repair pressure testing showed the leak was eliminated and the supply air was noticeably cleaner.
Visible leaks at registers and boots are the minority of the problem in Southlake homes. The significant leaks - the ones pulling attic air and insulation fibers - are hidden in attic runs, behind insulation, at plenum connections you can’t reach without proper equipment. DIY sealing with hardware-store tape addresses symptoms while the real damage continues. Our inspection cameras find what you can’t see, and our repairs carry the 365-Day Done Right Promise in writing.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Southlake since 2013.