Trusted Duct Repair & Sealing for Texas Homeowners
Affordable duct repair and sealing in Texas, TX typically costs $180-$650 depending on the scope, and most jobs are completed in a single visit. Bellows Air Duct & Vent Co. has been fixing and sealing ductwork across Texas since 1984, and we still answer our phones with a live person 24 hours a day. If your utility bills have climbed without explanation, rooms stay stubbornly hot in July or cold in January, or you hear air whistling through walls, your ducts are likely leaking conditioned air into your attic or crawl space.
We’ve spent 42 years serving homeowners who’ve lived in the same house for decades and want the best duct repair & sealing in Texas, TX, not contractors who show up late, invent charges, or disappear when something isn’t right. Our technicians are background-checked and uniformed, and every duct repair starts with a camera inspection so you see the damage before we touch a tool. We show one honest price before work begins, and we back it with our 90-Day Done Right Promise in writing. If it’s not right, we make it right. No paperwork, no arguing. Call (866) 347-2063 to schedule a free estimate.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps, cracks, and disconnected joints that let heated and cooled air escape before it reaches your rooms. In Texas, where attic temperatures can exceed 140 degrees in summer, every leak forces your HVAC system to run longer and harder than necessary. We use professional-grade mastic sealant and metal-backed tape, not the cheap foil tape that peels off after a season, and we verify our work with a camera inspection so you can see the sealed joints for yourself.
Flex Duct Repair
Flex duct, the insulated flexible tubing common in Texas homes built from the 1980s onward, collapses, tears, or disconnects at the collar over time. We’ve found crushed flex duct behind walls in Jacinto City and pulled rodent-damaged sections from attics in Galena Park and Bellaire that homeowners didn’t know existed. Our technicians replace damaged flex duct with properly sized new runs, secure collars with mechanical fasteners rather than tape alone, and balance airflow so every room gets what it was designed to receive.
Metal Duct Repair
Galvanized steel and aluminum ductwork in older Texas homes corrodes at seams, separates at joints, or develops holes from vibration and age. Metal duct repair requires sheet metal work, not patches, and we fabricate custom fittings on site when standard parts won’t fit your system. In Houston, Dallas, and West University Place, we’ve restored original metal duct systems in ranch homes built in the 1960s and 1970s, preserving the integrity of the original design while eliminating decades of accumulated leakage.
Duct Insulation
Uninsulated or deteriorated duct insulation in Texas attics wastes enormous energy, because 140-degree attic air heats your cooled supply air before it ever reaches the vent. We install fresh fiberglass or foil-faced insulation at the R-values appropriate for Texas climate zones, sealed with mastic at all seams. Proper insulation also prevents condensation that leads to mold growth, a problem we see regularly in humid Gulf Coast areas like Houston and Galena Park.
Mastic Sealant Application
Mastic is a thick, water-based sealant that remains flexible for decades, bridging gaps up to 1/8 inch in duct joints and connections. Unlike tape, which fails when surfaces expand and contract through Texas temperature swings, mastic bonds to metal, flex duct, and insulation board alike. We brush or trowel mastic onto every joint, seam, and penetration after cleaning the surface, and we don’t consider the job complete until a follow-up camera inspection confirms full coverage.
Air Leak Repair
Air leaks occur where ducts penetrate walls, floors, or ceilings, at register boots, and around filter racks where the duct system meets your living space. These leaks pull attic dust, insulation particles, and humidity directly into your air supply. We seal penetrations with fire-rated foam or mastic, repair or replace damaged register boots, and verify that your return air path is pulling from conditioned space only, not from a hot attic or musty crawl space.
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.
Brands We Service for Duct Repair & Sealing
We’ve worked on duct systems connected to Guardsman equipment for years, and we understand the specific fitting sizes and connection methods their OEM duct kits require. Whether it’s a standard Guardsman plenum or a custom transition, we fabricate repairs that mate properly without forcing connections that will leak later. We’ve also serviced hundreds of Honeywell whole-home ventilation and zoning systems, including their TrueZONE dampers and fresh air intake ductwork, and we stock common Honeywell duct-mounted components so repairs don’t stretch across multiple visits.
Our technicians train regularly on Rotobrush equipment and understand how their duct cleaning and inspection tools integrate with repair protocols, especially when we’re sealing after a thorough cleaning. Whether you have Guardsman, Honeywell, Rotobrush, or any other make of HVAC or duct accessory equipment, we can assess the system, identify the leak points, and repair it so it performs as designed.
Signs You Need Duct Repair & Sealing Right Now
- Rooms that won’t hold temperature. If your bedroom in Plano stays ten degrees warmer than the hallway in August, or your kitchen in Frisco is frigid while the living room is fine, conditioned air is escaping before it reaches the register. Leaky ducts can lose 20-30 percent of airflow to attic or crawl space, and no thermostat adjustment fixes that.
- Dust that returns hours after cleaning. When supply ducts leak in the attic, they create negative pressure that pulls dust, insulation fibers, and pollen through ceiling penetrations. If you’re wiping the same surfaces every other day, your ducts are likely drawing from the wrong side of the wall.
- Utility bills that climb without explanation. A sudden spike in your summer electric bill, especially in Texas markets where rates have been stable, often means your HVAC is compensating for duct losses. The system runs longer to hit the thermostat setpoint, and every extra minute costs money.
- Whistling, rattling, or whooshing from walls or ceilings. Air moving through a gap the width of a pencil can produce a high-pitched whistle you’ll hear at night. Rattling usually means a disconnected duct section is vibrating against framing. Both indicate pressurized air going somewhere it shouldn’t.
- Musty or chemical odors when the system runs. Leaky return ducts in crawl spaces or garages pull in volatile organic compounds, rodent droppings, or damp air that breeds mold. If the smell intensifies when the blower cycles on, the problem is in your duct path, not your living space.
Our Duct Repair & Sealing Process - Step by Step
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Camera inspection and damage assessment. We feed a high-resolution camera through your duct system to document cracks, separations, collapsed sections, and insulation condition. You see what we see, and we use this footage to explain exactly what needs attention and why.
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Upfront pricing with no surprises. Before we lift a tool, we present a written estimate with one honest price for the agreed scope. The number on the phone is the number on the invoice. We also explain any standing offers that apply, including our $50 Off Any Repair Over $250 and permanent 5% Senior and Veteran discount.
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Targeted repair and sealing. Our technicians repair or replace damaged duct sections, seal all joints with mastic and proper fasteners, and insulate where needed. We use professional-grade equipment from brands like Nikro and Abatement Technologies, and we work efficiently because most jobs are completed in a single visit.
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Post-repair camera verification. We run the camera again to show you sealed joints, proper insulation coverage, and intact connections. This visual record is your proof that the work was done right, not just claimed.
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Written documentation and 90-Day Done Right Promise. You receive a summary of work performed, before-and-after images, and our guarantee in writing. If anything isn’t right within 90 days, we return at no charge. No paperwork to file, no arguments to have.
How Much Does Duct Repair & Sealing Cost in Texas?
A typical duct sealing job in Texas runs $180-$450 for a standard single-system home with accessible attic ductwork. Flex duct repair or replacement of individual runs generally falls between $220-$550 depending on length and accessibility. Metal duct repair, which requires sheet metal fabrication, ranges from $300-$650 for most residential repairs. Duct insulation replacement adds $150-$400 depending on the linear footage involved.
Several factors move the price within these ranges. Attic accessibility matters: a truss attic with a walkable center aisle in Round Rock takes less time than a tight Cape Cod crawl space in Irving. The extent of damage affects material and labor; a single disconnected collar is straightforward, while a rodent-damaged system with multiple compromised runs requires more extensive work. System size and zoning complexity also play a role, because dual-zone systems in larger Frisco or Plano homes have more joints and transitions to inspect and seal.
To avoid overpaying, get a written estimate that specifies the scope in detail, not a phone quote that changes when the technician arrives. Be wary of “whole house” duct sealing specials that don’t include camera verification; if you can’t see the work, you can’t confirm it was done. Our free estimates include the full camera inspection, and we disclose every cost before work begins. Ask about our $89 Seasonal Tune-Up if your system hasn’t been serviced recently, or request a Free Second Opinion on Any Written Estimate if another company’s price seems inflated or vague.
Duct Repair & Sealing Near Texas - Our Service Area
We dispatch technicians from locations serving Duct Repair & Sealing in Houston, Duct Repair & Sealing in Dallas, and Duct Repair & Sealing in Austin, with response times typically same-day or next-day for most calls. Our coverage extends to San Antonio, Fort Worth, El Paso, Plano, Irving, Frisco, Round Rock, Jacinto City, and Galena Park. Whether you’re in a 1970s ranch in Richardson needing metal duct restoration or a newer build in Cedar Park with flex duct that never sealed properly, we’ll be there when we say. Call (866) 347-2063 to confirm availability in your neighborhood.
Serving Texas, TX - Our Local Coverage Area
We’re based in the Texas area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Duct Repair & Sealing in Texas
Duct repair and sealing fixes the leaks, gaps, and damage in your home’s air distribution system so conditioned air reaches your rooms instead of escaping into walls, attics, or crawl spaces. The process includes inspecting with a camera, sealing joints with mastic, repairing or replacing damaged duct sections, and insulating where needed. Properly sealed ducts can improve HVAC efficiency by 20 percent or more, especially in Texas homes where attic temperatures stress the system.
Most residential duct repair and sealing jobs are completed in 2-4 hours and finished in a single visit. Larger homes with multiple systems, extensive damage, or difficult attic access may take a full day, but we communicate timing clearly before we start. We respect your schedule and don’t leave jobs half-finished.
Duct sealing in Texas typically costs $180-$450, flex duct repair runs $220-$550, and metal duct repair ranges $300-$650 depending on accessibility and damage extent. Every estimate we provide is free, written, and binding before work begins. Call (866) 347-2063 for an exact quote for your home.
Yes, we regularly repair and seal duct systems connected to Honeywell zoning, ventilation, and damper equipment, and we stock common Honeywell duct-mounted components. Our technicians understand how Honeywell TrueZONE systems integrate with ductwork and can seal around dampers without compromising their operation. Whether your system is Honeywell, Guardsman, or another brand, we have the expertise to repair it properly.
Yes, we answer calls 24 hours a day with a live person, not voicemail or an app, and we schedule emergency repairs as quickly as same-day when duct damage has left your home without heating or cooling. Complete duct system failures in Texas summer heat or winter cold are genuine emergencies, and we treat them that way. Call (866) 347-2063 anytime.
Every duct repair and sealing job is backed by our 90-Day Done Right Promise in writing. If the repair fails, if a seal opens, or if you’re not satisfied for any reason, we return and make it right at no charge. No paperwork to file, no proof required, no arguments. We stand behind it because we’ve stood behind our work for over 42 years.
Clear a path to your attic access, HVAC closet, and crawl space if applicable, and secure pets in a separate room so our technicians can move freely with equipment. You don’t need to clean or move furniture; we protect your floors and work areas. We’ll handle everything else, including the camera inspection, repair, and cleanup. Call (866) 347-2063 to schedule at your convenience.
Schedule Your Duct Repair & Sealing Service in Texas Today
Call (866) 347-2063 to speak with a live person 24 hours a day and schedule your free estimate. We’ll show you one honest price before we start, back the work with our 90-Day Done Right Promise, and leave you with camera-verified proof that your ducts are sealed right. No bait coupons, no surprises, no callbacks needed. Just a square deal from a company that’s been doing it this way since 1984.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co., serving Texas since 1984.