Trusted Duct Repair & Sealing for Texas Homeowners
Duct repair and sealing in Texas typically costs $350–$950 depending on the extent of damage and home size, and most jobs can be scheduled within 24–48 hours. At Summit Air Duct Cleaning Service, owner Michael Brown shows up and does the work himself — not a subcontracted crew — using contractor-grade Rotobrush and Nikro systems built for this job. We’ve spent eight years focused on one trade: cleaning, repairing, and sealing the air pathways that move every breath of air through your Texas home. Whether you’re in Dallas dealing with summer heat straining your flex ducts, or in Highland Park noticing dust pouring from vents after a renovation, we’ll diagnose the leak or break and fix it without upselling you on equipment you don’t need. Call (844) 886-2161 for a free, no-obligation estimate — we answer our phones and we show up.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps, cracks, and separations in your supply and return ductwork that leak conditioned air into your attic, crawl space, or walls. In Texas, where air conditioning runs hard from March through October, even a 15% leak rate can add hundreds to your annual energy bill. We pressurize your system, locate every leak with a smoke pencil and thermal assessment, then seal with mastic or metal-backed tape — never the cheap gray duct tape that fails in our heat and humidity within two seasons.
Flex Duct Repair
Flex duct — the insulated flexible tubing common in Texas homes built from the 1980s forward — collapses, tears, or disconnects at the collar, especially in hot attics where the plastic liner degrades. We see this constantly in older Richardson and Mesquite subdivisions where original flex duct has hit its 20–25 year lifespan. Michael Brown replaces damaged sections with new R-6 or R-8 insulated flex, properly supports it to prevent sagging, and seals every connection so your airflow returns to design spec.
Metal Duct Repair
Galvanized steel ductwork, found in many pre-1980 Texas homes and commercial buildings, corrodes at seams, develops rust holes, or separates at the drive cleats. Metal repair requires sheet metal skills most generalist HVAC crews no longer carry — we cut and form replacement sections, weld or mechanically fasten, then seal with high-temperature mastic. In Grand Prairie and Addison commercial properties, we’ve restored metal trunk lines that competitors wanted to tear out completely.
Duct Insulation
Uninsulated or degraded duct insulation in your Texas attic turns your 55-degree supply air into 75-degree air before it reaches your bedroom vent. We wrap repaired or new ductwork with formaldehyde-free fiberglass insulation or closed-cell foam wrap, depending on your space constraints and local code. Proper insulation also prevents condensation that breeds mold — a real concern in Houston-adjacent humidity zones and anywhere air conditioning runs long hours.
Mastic Sealant
Mastic is a thick, water-based sealant that we brush or trowel onto seams, joints, and small holes — it cures into a flexible, permanent bond that outlasts tape by decades. Unlike tape, mastic conforms to irregular surfaces and won’t peel when Texas attic temperatures hit 140°F in July. We apply mastic on every metal seam and collar connection as standard practice, not as an upsell, because a sealed system is the only kind worth running.
Air Leak Repair
Air leaks occur at plenum connections, around filter racks, through deteriorated duct board, and where ducts penetrate walls or ceilings. We pressurize the system and use theatrical smoke or a digital manometer to quantify leakage to the exact CFM, then prioritize repairs by impact. In Bellaire and University Park homes with finished basements or complex multi-zone systems, this targeted approach saves you from paying for full duct replacement when only three connections are failing.
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 serviced and sealed ductwork connected to hundreds of Honeywell air cleaners and whole-home filtration systems across Texas, and we understand how their pressure-drop characteristics affect duct sizing and sealing strategy. When a Honeywell F100 or F300 media air cleaner is installed on a leaky return plenum, you’re filtering attic air instead of living-space air — we seal the enclosure first, then verify airflow with a manometer. Our experience with Aprilaire humidifiers and ventilators is equally deep: their steam and bypass humidifiers require precise duct pressure balance, and we’ve corrected countless installations where poor sealing caused condensation damage inside walls. Whether your system includes Guardsman UV sanitizing lights, Aprilaire dehumidifiers, or any other make, we can help — the ductwork doesn’t care what brand sits downstream, but your air quality depends on every joint being tight.
Signs You Need Duct Repair & Sealing Right Now
- Rooms that won’t heat or cool evenly. If your west-facing bedroom in Texas stays 8 degrees hotter than the hallway in July, or your kitchen is an icebox while your living room sweats, you’ve likely got a disconnected or crushed supply duct. The system runs longer, wears out faster, and never achieves comfort — sealing or repairing the specific damaged run fixes the root cause without replacing your HVAC unit.
- Dust blowing from vents right after cleaning. You had your ducts cleaned six months ago, but the return registers are filthy again? That’s air being pulled from your dusty attic or crawl space through a leak in the return side. We see this in Shady Hollow and Alief homes with original ductwork — the cleaning was done right, but the leaks were never addressed.
- Energy bills spiking year-over-year with no rate change. When your kilowatt usage jumps 20% or more compared to the same month last year, and your HVAC technician says the equipment checks out, duct leakage is the prime suspect. In Texas, where cooling dominates your annual spend, a 20% leak can mean $400–$800 in wasted electricity over a single summer.
- Musty or chemical odors when the system runs. Leaky return ducts in vented crawl spaces draw in soil gases, rodent activity, and moisture. Supply leaks in attics pull in fiberglass particles and dust. If your home smells like attic every time the blower cycles, you don’t need an air freshener — you need the pathway sealed.
- Visible duct damage in accessible areas. Crushed flex duct behind the water heater, rusted metal hanging by a strap, or tape that’s turned to powder — these are not cosmetic issues. In Alamo Heights and Highland Park, we’ve found disconnected flex ducts literally blowing conditioned air into the attic for years while homeowners blamed “old house” inefficiency.
Our Duct Repair & Sealing Process — Step by Step
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System inspection and pressure testing. Michael Brown arrives with a digital manometer and inspects all accessible ductwork, noting corrosion, separation, insulation condition, and support integrity. We then pressurize the system and measure total leakage against the square footage of your home — 10% leakage is acceptable; 20% or higher triggers our detailed repair recommendation.
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Leak detection and mapping. Using theatrical smoke pencils and infrared temperature scanning, we locate every significant leak and mark it with a numbered flag. You’ll see the map — no hidden findings, no surprise charges. In multi-story Texas homes, we focus especially on attic trunk lines and basement return plenums where pressure differentials are highest.
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Repair or replacement of damaged sections. We cut out failed flex duct, corroded metal, or delaminated duct board and install new material sized to match your system’s CFM requirements. Every connection is mechanically secured before sealing — we don’t trust tape alone to hold against Texas attic heat cycles.
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Mastic sealing of all seams and collars. Every joint, every penetration, every start collar gets brushed with mastic sealant. For metal ducts, we use UL-181 rated mastic; for flex connections, we combine mastic with proper tension straps. The goal is zero visible leakage when we retest.
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Post-repair pressure verification and cleanup. We pressurize again and show you the before-and-after leakage numbers. Then we clean our work area, remove old material, and leave your attic or crawl space cleaner than we found it. The invoice matches the estimate unless we found genuinely unexpected damage — and we photograph everything.
How Much Does Duct Repair & Sealing Cost in Texas?
A typical duct sealing job for a 2,000-square-foot Texas home runs $450–$750 when we’re addressing accessible leaks in the attic and sealing plenum connections. Flex duct repair for a single crushed or disconnected run usually falls between $280–$450, including material and labor. Metal duct repair is more variable: patching a rust hole might be $200–$350, while replacing a corroded trunk section in a commercial building can reach $800–$1,200 depending on sheet metal gauge and access difficulty.
What moves the price? Three factors dominate Texas jobs: accessibility (crawl space work costs more than attic work), the extent of damage (three leaks versus thirty), and whether we need to coordinate with your HVAC contractor for system shutdown. You avoid overpaying by getting a specialist who diagnoses precisely rather than selling whole-system replacement. Every Summit Air Duct Cleaning Service estimate is free, in-home, and itemized — you’ll know the exact cost before we start. Call (844) 886-2161 for an exact quote — estimates are free.
Duct Repair & Sealing Near Texas — Our Service Area
We run duct repair and sealing calls across the greater Texas metro, typically arriving same-day or next-day for standard requests and within hours for emergency disconnections or collapsed ducts in summer heat. Our core routes cover Duct Repair & Sealing in Dallas, Richardson, Mesquite, and Grand Prairie to the east; Duct Repair & Sealing in Lackland Air Force Base and Alamo Heights to the south; and Duct Repair & Sealing in Highland Park, University Park, Addison, Bellaire, Shady Hollow, and Alief throughout the central corridor. If you’re unsure whether we cover your address, call — we don’t charge to confirm service area.
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 physical damage and air leaks in your ductwork, while duct cleaning removes accumulated dust and debris from interior surfaces. You can have spotless ducts that still leak 30% of your conditioned air into the attic — we often recommend cleaning first, then sealing, so the repaired system stays clean longer. Summit Air Duct Cleaning Service offers both services, and Michael Brown will tell you honestly if your ducts need one, the other, or both.
Most residential duct sealing jobs in Texas take 3–5 hours; a single flex duct repair might take 90 minutes, while a full system with multiple metal repairs can extend to a full day. We don’t charge by the hour — our estimates are flat-rate based on the scope we identify during inspection. You’ll know the time expectation before we start.
Duct sealing for a typical Texas home runs $450–$750, flex duct repair $280–$450 per run, and metal duct repair $200–$1,200 depending on complexity. Emergency repairs during peak summer may carry a modest urgency fee, but we never surge-price. Call (844) 886-2161 for an exact quote — estimates are free.
Yes — we’ve sealed and repaired ductwork connected to hundreds of Honeywell filtration units, Aprilaire humidifiers and ventilators, and Guardsman UV systems across Texas. We don’t install new HVAC equipment, but we know how these accessories interact with duct pressure and we seal accordingly. Whether you have these brands or any other make, we can help.
Yes — collapsed flex ducts, completely disconnected returns, or major leaks causing AC shutdown get priority scheduling, often same-day. In July and August, we keep emergency slots open because a leaking attic duct in 102-degree Texas heat isn’t an inconvenience, it’s a genuine comfort and safety issue. Call (844) 886-2161 and we’ll give you a realistic arrival window.
Our sealing and repair workmanship is backed by a one-year warranty against failure of materials or labor under normal use. If a sealed joint opens or a repaired section fails within twelve months, we return and fix it at no charge. This warranty applies to our work, not to new damage from rodents, construction, or homeowner modification.
Clear a path to your attic access, crawl space entry, and utility room; remove fragile items from work zones; and ensure pets are secured. We bring drop cloths, shoe covers, and our own lighting, so you don’t need to prepare beyond basic access. Michael Brown will call 30 minutes before arrival so you’re not waiting around.
Schedule Your Duct Repair & Sealing Service in Texas Today
Don’t let leaky ducts steal your comfort and inflate your energy bills through another Texas summer. Call Summit Air Duct Cleaning Service at (844) 886-2161 for a free, no-obligation estimate — Michael Brown will inspect your system, show you exactly what’s leaking, and seal it right. Eight years focused on one trade. 775 customers. 4.9 stars. See for yourself.
Written by Michael Brown, Owner at Summit Air Duct Cleaning Service, serving Texas since 2016.