Duct Repair & Sealing in Arlington - We Measure the Leak Before We Quote

Fast, Reliable Duct Repair & Sealing Across Arlington

Duct repair and sealing in Arlington typically runs $280-$750 for most residential jobs, with flex-duct replacement on aging slab-tract homes often landing in the $400-$650 range. We’re usually scheduling within 2-3 business days for Arlington properties, with dispatch coordinated from our Dallas-Fort Worth office and crews working Arlington neighborhoods daily. Call (682) 297-4068 for a written estimate before any work starts.

Call (682) 297-4068

Our Duct Repair & Sealing team knows the Arlington market because we’ve been documenting failures in its attics since 2013. This isn’t generic suburban work. The city’s 1965-1995 build-out left an unusually dense concentration of slab-on-grade tract homes with ductwork routed through unconditioned attic spaces now 30-55 years old. Those original fiberglass duct board trunks and early flex-duct branches weren’t designed for the 150°F-plus temperatures that persist six months a year on the Blackland Prairie. We see the results every week.

Why CleanRun Air Duct Cleaning Irving Is Arlington’s Preferred Duct Repair & Sealing Company

We’ve served Arlington homeowners since our founding in 2013, completing over 52,000 jobs across the metro with a documented photo record on every visit. Our crews know the difference between a duct that needs sealing and one that needs replacement because we’ve photographed thousands of Arlington attic systems - not guesswork, visual evidence.

Arlington customers receive the same standard we apply everywhere: a written price before any work starts, under Haven Standard Clause 1. No “call for a quote.” The number you sign off on is the number on the invoice. Our 365-Day Done Right Promise applies in Arlington exactly as it does everywhere else - backed in writing, not subject to manager approval.

Technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The license number is published on this page, not buried in a footer where you’d never find it. Equipment includes Rotobrush, Nikro, and Guardsman systems you can look up independently before agreeing to anything.

We coordinate scheduling from our Dallas-Fort Worth office and route crews through Arlington daily, including the older east-side corridors along Arkansas Lane and Collins Street where the 1970s-1980s ranch stock is hitting critical duct failure age.

Our Duct Repair & Sealing Services in Arlington

Flex Duct Repair

Flex duct dominates Arlington’s residential attic systems, and it’s where we find the most urgent failures. On a 1978 ranch off Arkansas Lane, our tech ran a camera inspection and found the flex branch to the master bedroom had a cracked foil jacket with collapsed batting blocking half the airway; we used mastic sealant and Guardsman tape to seal the plenum connections, replaced the failed flex run, and verified static pressure before and after. The homeowner said the room had never cooled properly in fifteen summers - after resealing and rebalancing, the supply register finally delivered full airflow.

Arlington’s specific attic thermal load drives this failure mode. The vapor barrier on flex duct installed during the 1970s-1990s wasn’t rated for decades of 150°F-plus exposure. We replace the run, seal the connections, and document the pressure improvement. Typical flex-duct repair or replacement in Arlington runs $320-$580 per run, depending on length and attic access.

Mastic Sealant Application

Mastic is a water-based paste we brush onto duct joints, plenum connections, and register boots, then allow to cure into a flexible, permanent seal. Unlike tape, which can loosen as the duct metal expands and contracts through cooling seasons, mastic fills gaps and remains adhered through thermal cycling. In Arlington’s climate, this matters enormously - ducts go from 150°F attic ambient to 55°F supply air repeatedly, and tape adhesive degrades fast under that stress.

We apply mastic at every joint on new installs and as part of repair work on existing systems. A full mastic seal of an Arlington attic trunk and branch system typically runs $380-$620. The work includes sealing the air handler plenum, all trunk-line joints, flex-duct collar connections, and register boots where they penetrate the ceiling.

Air Leak Repair

Leak detection in Arlington attics starts with a visual inspection and often includes pressure testing to quantify the loss. Common leak points in local homes: separated flex-duct collars at trunk takeoffs, where heat-cycled zip ties have failed after 30-50 years; gaps between the air handler plenum and the first trunk section; and register boots that have pulled away from drywall due to duct vibration. We seal what can be sealed, replace what can’t, and show you the before-and-after photos. Air leak repair in Arlington typically falls in the $280-$520 range for localized work, or $650-$950 for whole-system sealing with pressure verification.

Metal Duct Repair

Some Arlington homes, particularly a few pockets of 1960s construction and later custom builds, have galvanized steel trunk lines. We repair separated seams, replace rusted sections, and seal with mastic and proper mechanical fasteners. Metal duct in Arlington attics suffers from condensation-related corrosion where insulation has degraded, and from seam separation where original sealant has aged out. Repair costs typically run $340-$680 depending on accessibility and extent.

Duct Insulation

When Arlington attic temperatures exceed 150°F, uninsulated or degraded ductwork acts like a radiator in reverse - cooling your air before it reaches the rooms. We install new foil-faced fiberglass insulation on repaired or replacement runs, or wrap existing metal trunks where the original insulation has fallen away. Duct insulation work in Arlington typically runs $420-$780 for a standard single-system home.

Duct Sealing

Our general duct sealing service combines mastic application, mechanical fastening, and pressure testing to reduce system leakage. Arlington’s older homes often test at 25-40% leakage before sealing, dropping to under 10% after proper work. Whole-system sealing with pressure verification runs $580-$920 in the Arlington market.

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Trusted Brands We Service in Arlington

We carry professional-grade equipment from Rotobrush, Nikro, Honeywell, and Aprilaire - brands with published specifications you can verify before we start. For Arlington repairs, we stock Guardsman tape and mastic rated for the temperature extremes these attics produce. Parts availability means most repairs complete in a single visit, with no waiting on specialty orders for standard flex-duct sizes and collar fittings.

Common Duct Repair & Sealing Problems We See in Arlington Homes

• Foil-facing delamination on original duct board trunks. The adhesive holding the foil vapor barrier to fiberglass duct board degrades after decades in 150°F-plus Arlington attics. The facing separates, shedding glass fibers into the airstream that pass through registers into living spaces. This requires trunk replacement, not sealing - the board itself has failed structurally.
• Flex-duct collar separation at air handler and trunk takeoffs. Heat-cycled zip ties and aging mastic fail after 30-50 years of Arlington attic exposure. The flex duct pulls away from the collar, dumping conditioned air into the attic and pulling attic air into the return. We find this weekly in east-side neighborhoods along Collins Street and Arkansas Lane.
• Collapsed flex-duct batting from vapor-barrier breakdown. When the foil jacket cracks, the fiberglass batting absorbs moisture and collapses inward, partially blocking airflow and creating a pathway that pushes glass fibers directly into supply registers. This is the failure mode from our 1978 ranch field vignette - replacement is the only fix.
• Register boot separation from ceiling drywall. Vibration and thermal cycling loosen the connection between the boot and the finished ceiling, creating a gap that leaks attic air around the register. Simple to seal with mastic if caught early; often accompanied by insulation debris staining the ceiling if left unaddressed.

Pricing for Duct Repair & Sealing in Arlington, TX

We Also Serve Cities Near Arlington

Our crews work daily across the metro, including Arlington and neighboring Mansfield, Grand Prairie, Haltom City, and North Richland Hills. Scheduling is coordinated from our Dallas-Fort Worth office with local routing to minimize drive time and keep appointments predictable.

FAQs - Duct Repair & Sealing in Arlington