Duct Repair & Sealing in Keller, TX - Same-Day Service, Done Right the First Time

Fast, Reliable Duct Repair & Sealing Across Keller

Duct repair and sealing in Keller typically costs $280-$650 for most residential jobs, with flex duct repairs running $180-$340 per run and full system sealing ranging from $450-$850 depending on home size. We’re usually on-site in Keller within the same day you call, and most repairs are finished in a single visit. If your upstairs zone isn’t keeping up, your energy bills have climbed, or you’re hearing air move through the walls instead of the vents, there’s a fair chance your ductwork has pulled apart or degraded in the attic. That’s where our Duct Repair & Sealing team comes in. We’ve been working in Keller’s master-planned neighborhoods since before many of them were fully built out, and we know the specific failure patterns these homes develop. Call (844) 685-6342 for a free estimate - we’ll show you exactly what’s wrong before any work begins.

Call (844) 685-6342

Why Bellows Air Duct & Vent Co. Is Keller’s Preferred Duct Repair & Sealing Company

We’ve been serving Keller homeowners for over 42 years, long enough to watch the city transform from a quiet stop along Highway 114 into one of the most sought-after addresses in Northeast Tarrant County. Ray Castillo has led Bellows Air Duct & Vent Co. since 1984, and our reputation here is built on showing up when we say we will and fixing it so you don’t have to call back.

Our technicians are background-checked, uniformed, and equipped to handle the large dual-zone systems common in ZIP codes 76244 and 76248. Most Keller jobs are completed in a single visit. We answer calls with a live person 24 hours a day - no voicemail, no app. Every job gets a camera inspection before and after, so you see what we see. And our 90-Day Done Right Promise means if it’s not right, we make it right with no paperwork and no arguing.

Our Duct Repair & Sealing Services in Keller

Flex Duct Repair

Keller’s early-2000s master-planned neighborhoods like the Shores of Northlake and Hidden Lakes are filled with large dual-zone homes that still have original builder-grade flex duct. After 15-25 years in attics that routinely exceed 150°F in July, that flex duct has often partially detached or collapsed. We recently repaired a collapsed flex duct in a Hidden Lakes home off Rufe Snow Drive; the second-floor HVAC had sagged duct runs that had pulled loose from the boot, blowing conditioned air into the attic. We re-secured the connections with mastic sealant and reinforced them with strapping, restoring airflow to the upstairs zone. Flex duct repair in Keller typically runs $180-$340 per run, with larger homes requiring multiple runs.

Duct Sealing

The sheer duct footage in a 3,500 sq ft Keller home - often double what a typical 1,800 sq ft house requires - means even small leaks add up to significant energy loss. We seal joints, connections, and penetrations with professional-grade mastic and reinforced mesh, not the foil tape that peels off after a few seasons in a hot attic. A full duct sealing job in Keller averages $450-$650 for a single-zone system and $650-$850 for dual-zone homes. We seal first, then verify with pressure testing where appropriate.

Metal Duct Repair

Some Keller homes, particularly custom builds in South Keller and along Davis Boulevard, use galvanized metal ductwork. Metal ducts don’t collapse like flex, but they rust at seams, separate at joints, and develop whistle-inducing gaps. We repair metal duct with proper sheet metal patches, sealant, and mechanical fasteners - no duct tape, ever. Metal duct repair in Keller typically ranges from $220-$480 depending on accessibility and extent of damage.

Duct Insulation

When flex duct insulation degrades in a Keller attic, the duct loses R-value and begins sweating in humid months, which accelerates liner deterioration. We replace damaged insulation wraps or install new insulated flex where the original is beyond saving. Duct insulation work in Keller runs $150-$300 per run, with most jobs requiring 2-4 runs in a large home.

Mastic Sealant

Mastic is our preferred sealant for Keller attics because it remains flexible across temperature extremes and bonds to both metal and flex duct surfaces. Unlike tape, mastic won’t dry out and fail after a single brutal North Texas summer. We apply mastic with a brush or trowel at all joints and connections, then reinforce with fiberglass mesh at stress points. This is standard on every duct sealing and flex duct repair job we perform in Keller.

Air Leak Repair

Return air leaks in Keller homes often occur where the return plenum meets the drywall or where flex duct connects to ceiling boots. These leaks pull hot attic air and cedar pollen directly into your system, loading your coils and blowing unfiltered air into your living space. We locate these leaks with visual inspection and smoke testing, then repair and seal them properly.

Trusted Brands We Service in Keller

We repair and seal ductwork connected to all major HVAC brands, and we stock common repair materials from Rotobrush, Nikro, and Abatement Technologies for fast turnaround on Keller jobs. These are the same brands serious HVAC contractors specify, not the discount hardware-store supplies that fail in a season. Because we keep materials on our trucks, most Keller repairs don’t require a return trip. If your system uses Aprilaire or Honeywell air cleaners or zoning controls, we’re familiar with their integration requirements and clearances.

Common Duct Repair & Sealing Problems We See in Keller Homes

• Flex duct pull-away at boot connections. In Keller’s unconditioned attics, years of 150°F+ heat cycles cause the flex duct to soften and sag, eventually pulling loose from the metal boot. We re-seat the connection and secure it with mastic and strapping so it stays put.
• Duct liner disintegration from cedar pollen exposure. Keller sits at the eastern edge of the Cross Timbers, where mountain cedar pollen from December through February sends extremely fine particles into return-air intakes. Over 15+ years, this pollen loads and degrades flex duct liners, causing tears and leaks that standard cleaning can’t fix.
• Second-floor duct runs collapsed under their own weight. After insulation degradation, long flex duct runs to upstairs zones in Keller’s large homes lose structural support and collapse, blocking airflow to bedrooms. These must be repaired or replaced before cleaning can be effective.
• Return air leaks pulling attic air and allergens. Gaps between return plenums and ceiling drywall are common in Keller’s builder-grade installations. These leaks pressurize the attic with conditioned air while pulling hot, pollen-laden air into your system.

Pricing for Duct Repair & Sealing in Keller, TX

We Also Serve Cities Near Keller

Our service area extends throughout Northeast Tarrant County. We regularly perform Duct Repair & Sealing in Keller and in neighboring Watauga, North Richland Hills, Southlake, and Trophy Club. The same 90-Day Done Right Promise and upfront pricing apply no matter which city you’re in.

FAQs - Duct Repair & Sealing in Keller