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 Dallas
Duct repair and sealing in Dallas typically costs $280-$650 for most residential jobs, with flex duct replacement running higher when attic access is tight. We dispatch crews daily from our Dallas-Fort Worth office to slab homes throughout the city, from Lake Highlands to Oak Cliff to the rural properties east and south of the metro where unpaved roads throw dust loads that city homeowners rarely see. Call (469) 452-7766 and we’ll put a written price in your hand before any panel comes off.
Our Duct Repair & Sealing team has worked Dallas attics since 2013. We know the 150°F summer heat that cooks flex duct above the insulation line. We know the cedar pollen that packs return plenums by January. And we know that a duct run can look fine from the access hatch while being completely separated from the trunk beneath blown-in insulation, venting your conditioned air into the attic for years. We find that with a camera before we quote, not after.
Why CleanRun Air Duct Cleaning Plano Is Dallas’s Preferred Duct Repair & Sealing Company
We’ve served more than 52,000 homes since 2013, every one with a written price before work started and a Documented Photo Record delivered when the crew left. In Dallas, that record matters more than most places. The attic ductwork here fails in ways that are invisible from the living room. Our before-and-after photos show you the separated collar, the collapsed flex, the mastic gap pulling 150°F attic air into your supply. No manager has to approve your warranty claim because the 365-Day Done Right Promise is backed in writing on every job, Haven Standard Clause 1.
Tomas Reyes built this company on the principle that a customer should see what we see before deciding what to fix. That means camera inspection, written scope, written price. No exceptions. Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. The license number is published on this page, not buried in a footer, because credentials should be verifiable before you invite someone into your home.
Dispatch and scheduling are coordinated from our Dallas-Fort Worth office, and crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies on every truck. That matters when you’re on a gravel county road south of the city and need a flex run reconnected and sealed same day. We don’t subcontract rural calls to a third party. Our crews drive them.
Our Duct Repair & Sealing Services in Dallas
Flex Duct Repair
Dallas’s slab-on-grade construction routes virtually all ductwork through attics that hit 140-160°F from May through September. That thermal extreme degrades flex duct faster here than in cities with basement or crawlspace systems. We regularly find original 1970s flex in Garland, Mesquite, and east Dallas that has sagged, collapsed, or fully separated at trunk-line connections beneath decades of blown-in insulation. Our crew photographs the damage, delivers a written price for repair or replacement, and reconnects with mechanical fasteners and mastic sealant that holds through the next summer. On rural properties off unpaved roads, we also check for dust loading and rodent debris that accelerates deterioration.
Mastic Sealant Application
Tape fails. Mastic doesn’t. In Dallas, where ducts expand and contract through extreme summer heat and sudden blue norther cold fronts, we apply professional-grade mastic sealant to collar joints, trunk connections, and plenum seams. This is slow work done by hand, not a spray-and-go process. We use Guardsman and other trade-recognized products rated for the temperature swings Dallas attics see. The result is a sealed system that doesn’t pull superheated attic air, insulation fibers, or pollen into your living space. Every sealed joint is photographed before and after.
Duct Insulation
Uninsulated or degraded duct insulation in a 150°F Dallas attic is like running your air conditioner through a sauna. We replace damaged insulation on flex and metal runs with products rated for the thermal load, paying special attention to rural properties where outbuilding or detached-garage duct systems sit idle for months and lose insulation integrity to rodent activity and weather exposure. Proper insulation lowers static pressure on your HVAC unit and stops the condensation that breeds microbial growth in dark attic corners.
Metal Duct Repair
Older Dallas homes, particularly pre-1990 builds in Oak Cliff and Richardson, often have galvanized metal trunk lines with spot-welded seams that have worked loose through decades of thermal cycling. We repair separated seams, replace corroded sections, and install access panels where needed for future maintenance. Metal duct holds up better than flex in Dallas’s heat, but only when the seams are tight and the collars are sealed.
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 Dallas
Our trucks stock parts and materials from Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman, brands any homeowner can look up and verify. That local inventory matters on a Dallas job. When we find a separated flex run on a rural property east of the city, we don’t drive back to a warehouse for mastic or insulation. We fix it then, photograph it, and move to the next run. Fast turnaround on stocked parts is how we keep our written price honest - no trip charges buried in the quote, no “we’ll come back next week” delays that leave you breathing attic air.
Common Duct Repair & Sealing Problems We See in Dallas Homes
- Flex duct collapsed beneath blown-in insulation. In Garland, Mesquite, and east Dallas slab homes from the 1970s, we regularly uncover original flex that has fully separated at trunk-line connections. It looks intact from the access hatch. It isn’t. Conditioned air has been venting straight into a 150°F attic, sometimes for years, while the homeowner pays higher electric bills and wonders why the back bedroom never cools.
- Unpaved-road dust and pollen packing returns. On rural and open-land properties around Dallas, gravel and county roads throw mineral dust and mountain cedar pollen that loads return ducts far faster than city systems experience. That debris gets pulled through cracked mastic or loose collars into living spaces, aggravating cedar fever and leaving a persistent film on registers.
- Thermal cycling loosens collars and sealant. Dallas HVAC systems run heavy load eight to ten months per year, and sudden blue norther cold fronts cause rapid contraction in attic metal and flex runs. Repeated expansion and contraction loosen tape, mastic, and mechanical fasteners in ways that milder climates simply don’t replicate.
- Outbuilding and detached-garage duct failures. Rural properties often have duct runs to workshops, barns, or guest quarters that sit idle most of the year. Rodents enter through failed seals, insulation degrades, and the first time the system kicks on, it pulls debris and droppings into the main house return. We inspect and seal these as part of a whole-system scope.
Pricing for Duct Repair & Sealing in Dallas, TX
Most Dallas residential duct sealing jobs run $280-$450 for a standard single-system home with accessible attic space. Flex duct repair or replacement on individual runs typically falls between $180-$340 per run, depending on length and whether the trunk connection needs reworking. Full metal duct repair with seam sealing and collar replacement ranges $420-$650. Outbuilding or detached-garage systems add $150-$280 when included with a main house scope.
What moves the number: attic accessibility, the extent of separation or collapse, insulation condition, and whether we find rodent damage requiring exclusion work before sealing. We price by the system and the scope, not by the vent. One flat price per system, agreed in writing before any work starts, Haven Standard Clause 1. No per-vent add-ons. No coupon that triples once the truck is in your drive.
Bring us a competitor’s written estimate and we’ll deliver a free second opinion, our number next to theirs, no obligation.
We Also Serve Cities Near Dallas
Our crews work Duct Repair & Sealing in Dallas and the surrounding communities of Irving, Mesquite, Richardson, and Carrollton. Rural properties on county roads east and south of the metro are fully in our service area, with the same written pricing, same documented photo record, and same 365-Day Done Right Promise that applies inside the city limits.
Serving Dallas, TX - Our Local Coverage Area
We’re based in the Dallas 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 Dallas
Every 2-3 years, not the 5-year interval that works for city homes on paved streets. Unpaved roads throw mineral dust and pollen that load returns faster, and Dallas’s 140-160°F attic heat degrades seals and flex in the same timeframe. If you’re on a gravel county road and run a wood stove or outbuilding heater in winter, lean toward the shorter end of that range. Call (469) 452-7766 and we’ll inspect, photograph, and put a written scope in your hand.
Slab-on-grade construction forces virtually all residential ductwork into attics that hit 140-160°F during Dallas’s prolonged summer heat, a thermal extreme absent in cities like Chicago or Denver where ducts run through conditioned basements or mild crawlspaces. That heat degrades flex duct, loosens mastic and tape, and causes repeated expansion and contraction that separates trunk connections. Systems also run under heavy load eight to ten months per year, accelerating wear. The result is faster failure and higher contamination rates than in cooler or milder climates.
We can often repair if the flex material itself is intact and the separation is at a collar or trunk connection. We remove the insulation to expose the joint, reconnect with mechanical fasteners, apply mastic sealant rated for Dallas’s thermal extremes, and re-insulate the run. If the flex has sagged, torn, or degraded from heat exposure, replacement is the honest recommendation. We photograph both options and quote each in writing before you decide.
It stops your HVAC system from pulling unfiltered attic air, pollen, and insulation fibers into your supply. Dallas carries some of Texas’s highest annual pollen concentrations - mountain cedar in December through January, elm and oak in spring, ragweed in fall - and cracked duct seals act as intake points. When we mastic-seal collars and trunk connections, the only air entering your supply is what passes through your filter. Customers with cedar fever often notice reduced symptoms within a week of sealing, particularly if returns were pulling from a contaminated attic space.
Yes, and they are frequently the dirtiest runs in the system. Outbuilding ducts sit idle for months, allowing rodents to enter through failed seals and insulation to degrade. When the system kicks on, it pulls that debris into the main house return. We inspect these runs with the same camera, seal with the same mastic, and include them in the whole-system photo record. Ignoring them leaves a contamination source that undermines the work on your main ducts.
Ready to see what’s actually happening in your attic? Call (469) 452-7766 for a free estimate. We’ll show you the photos, put the price in writing, and let you decide what to fix.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Plano, serving Dallas since 2013.