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 Farmers Branch
Duct repair and sealing in Farmers Branch typically costs $280-$750 for most residential jobs, with full-system resealing on older homes running toward the higher end. CleanRun crews serve Farmers Branch from our Dallas-Fort Worth office, and we schedule these jobs with a written price delivered before any work starts - no exceptions. If your home was built between 1950 and 1975, there’s a strong chance your ductwork is pulling unfiltered attic air through gaps you can’t see, and that’s the problem we diagnose first. Call (940) 290-8552 for a free estimate with a written number on the spot.
Why CleanRun Air Duct Cleaning Frisco Is Farmers Branch’s Preferred Duct Repair & Sealing Company
We’ve been in Farmers Branch homes since 2013, and the pattern is consistent: the ductwork is original or first-generation, the attic is a furnace in July, and the Blackland Prairie clay underneath has been moving that slab for decades. Our Duct Repair & Sealing team documents every gap, every collapsed run, every boot separation with before-and-after photos you receive as part of the standard job record.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise applies to every Farmers Branch job in writing, not as a verbal assurance. We’ve served more than 52,000 homes, every one with a written price before work started and a documented photo record when the crew left. Bring any competitor’s written estimate and we’ll deliver a free second opinion with our number beside it.
Our Duct Repair & Sealing Services in Farmers Branch
Mastic Sealant Application
Mastic sealant is a thick, fiber-reinforced paste brushed onto sheet-metal joints and duct connections - it hardens into a permanent, flexible seal that outlasts tape by decades. In Farmers Branch, we apply mastic to trunk-line joints that have reopened after years of thermal cycling in 150°F attics, and to register boots that have separated from the duct due to slab movement. A typical mastic resealing job on a 1,800-square-foot ranch near Josey Lane runs $340-$520.
Flex Duct Repair & Replacement
Flex duct is the insulated, flexible tubing that connects your main trunk lines to individual room registers. The foil facing and adhesive tape on Farmers Branch’s original 1960s-1970s flex duct degrades after repeated exposure to attic temperatures above 145°F, and the inner liner collapses where it sags across joist bays. We replace failed flex with new R-8 insulated duct, properly supported and sealed, or repair isolated damage where the run is otherwise sound. Flex duct repair or replacement in Farmers Branch typically runs $180-$340 per run, with full attic replacement on larger homes reaching $680-$950.
Metal Duct Repair
Sheet-metal trunk lines form the backbone of most Farmers Branch systems, but longitudinal seams and joint connections loosen over decades of expansion and contraction. We spot-weld separated seams, replace rusted sections, and reinstall dampers that have fallen out of adjustment. Metal repair on a typical Farmers Branch ranch runs $260-$480, depending on access and the extent of corrosion from condensation pooling in low spots.
Air Leak Repair & Duct Insulation
Air leak repair targets the gaps where conditioned air escapes into the attic or unconditioned crawl space - the boots, the plenum connections, the access panel. In Farmers Branch’s older neighborhoods near Mustang Park, we consistently find that Blackland clay foundation movement has pulled floor-register boots a half-inch or more off the duct opening. The “cleaned” duct is actually pulling raw attic air around that gap. We rebuild those connections with mechanical fasteners and mastic, then test tight under negative pressure. Air leak repair with boot resealing runs $220-$420; adding insulation wrap to exposed trunk lines in the attic adds $180-$320.
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 Farmers Branch
Our equipment roster includes professional-grade tools from Honeywell, Aprilaire, and Abatement Technologies - brands you can look up independently before agreeing to any price. We stock common replacement components for Farmers Branch’s vintage systems, including register boots sized for the 4-inch and 6-inch openings common in mid-century ranch construction, which means most repairs don’t wait on parts. Our negative-pressure testing equipment is manufactured by Abatement Technologies, and we use Honeywell media filters when upgrading return-air filtration on older systems that weren’t designed for high-MERV loads.
Common Duct Repair & Sealing Problems We See in Farmers Branch Homes
- Clay-driven boot separation. Seasonal slab movement on Farmers Branch’s expansive Blackland Prairie clay pulls floor-register boots away from the duct opening. The system draws dusty, superheated attic air around the gap instead of through the filter. We see this recurring every few years in homes near Mustang Park and along the Valley View corridor.
- Attic heat destroys seals. At 145-155°F, the foil facing on 1970s-era flex duct and the adhesive tape on trunk-line joints degrades and peels, reopening leaks that were just sealed. Mastic is the only permanent solution in this environment.
- Collapsed flex in unconditioned runs. Original or first-generation flex routed through the attic sags and crushes, choking airflow at the air handler and defeating any cleaning that came before it. Replacement with properly supported R-8 duct is the fix.
- Filter bypass from gaps in the return plenum. The sheet-metal box that connects your return duct to the air handler often has unsealed seams or a poorly fitted filter rack, allowing unfiltered air to enter the blower. We seal these with mastic and install a properly sized filter housing when needed.
Pricing for Duct Repair & Sealing in Farmers Branch, TX
A typical duct sealing job in Farmers Branch runs $280-$550 for a single-story ranch with accessible attic space. Full-system resealing with mastic on an older home with multiple failed boots reaches $620-$750. Flex duct replacement adds $180-$340 per run. Metal duct repair runs $260-$480. These are whole-system prices, not per-vent teaser rates that balloon once the truck is on your driveway.
Every CleanRun job starts with a written price under Haven Standard Clause 1 - before a single panel comes off, before any mastic is opened. The estimate is free, and there’s no obligation. What affects the final number: attic accessibility, the number of failed runs, whether boots need mechanical rebuilding or just resealing, and whether the plenum itself requires work. We photograph every condition we find and show you before quoting. Call (940) 290-8552 for your written estimate.
We Also Serve Cities Near Farmers Branch
CleanRun crews work throughout the northern Dallas-Fort Worth corridor. We also provide Duct Repair & Sealing in Farmers Branch and surrounding communities including Frisco, Prosper, The Colony, and Little Elm. Scheduling and dispatch are coordinated from our Dallas-Fort Worth office, with local crews serving each market.
Serving Farmers Branch, TX - Our Local Coverage Area
We’re based in the Farmers Branch 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 Farmers Branch
Every two to three years for most Farmers Branch homes, and annually if you have pets, allergies, or live near unpaved roads with higher dust loading. The DFW area’s mountain cedar, elm, and ragweed seasons deposit more particulate than regional averages, and the 50-70-year-old ductwork in most Farmers Branch homes has rougher interior surfaces that trap debris. If your system has active leaks from separated boots, cleaning is secondary - sealing comes first, or you’re paying to clean a duct that’s immediately recontaminated. Call (940) 290-8552 and we’ll inspect before recommending either service.
Because the odor is coming from gaps around the duct connections, not from debris inside the duct itself. We were called out to a 1962 single-story ranch on the Valley View corridor where the homeowner complained that every room smelled like attic dust after the AC cycled. A camera inspection showed three floor-register boots had lifted off their openings from slab movement, and two collapsed flex runs in the unconditioned attic had lost their foil facing to years of 150°F summer heat. We pulled the failed flex, rebuilt those boots with proper mastic sealant, and re-secured every register connection - supply and return ducts both tested tight under negative pressure afterward. The cleaning she’d paid for six months earlier couldn’t fix a leak it never addressed.
Yes. We access register boots from the attic or crawl space side, or through the floor register opening itself with extension tools. In Farmers Branch’s slab homes, the boot sits in a concrete pocket - we don’t cut the slab. Mastic is applied to the duct-to-boot joint from below or through the register box, and mechanical fasteners secure the connection without floor damage. If the boot has lifted too far for reattachment, we install an adjustable extension boot that accommodates future movement. Typical boot resealing without floor damage runs $220-$340 per location.
MERV 8 for most systems, MERV 11 only if the return duct is oversized and the blower motor has been verified for the static pressure load. The original ductwork in 1950-1975 Farmers Branch homes was designed for the low resistance of a basic fiberglass filter. A MERV 13 pleated filter in an undersized return plenum chokes airflow, overheats the heat exchanger, and ices the coil. We measure static pressure before recommending any filter upgrade - Haven Standard Clause 4: Verified Conditions. If you want better filtration without straining the system, we can add a bypass HEPA or upgrade the return duct size.
Replacement if the inner liner is torn, the insulation is water-stained, or the foil facing has degraded - all common in Farmers Branch’s original flex after decades in 145°F+ attics. Repair is possible if the collapse is recent, the materials are intact, and the sag was caused by a failed support strap rather than material failure. We photograph the condition and show you before quoting either way. A single collapsed run with intact materials runs $180-$260 to repair and re-support; replacement with new R-8 flex runs $280-$340 per run. Call (940) 290-8552 for a camera inspection and written price.
Ready to stop paying to heat and cool your attic? CleanRun delivers written prices, documented photo records, and repairs that hold up to Farmers Branch’s clay soil and brutal attic heat. Every job is backed by the 365-Day Done Right Promise in writing. Call (940) 290-8552 for your free estimate - a live person answers, 24/7.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Frisco, serving Farmers Branch since 2013.