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 Sealing Across Dallas
Duct sealing in Dallas typically runs $450 – $1,200 per system depending on attic accessibility, duct material, and whether we’re sealing metal trunk lines or replacing crushed flexible runs. Most Dallas homes built after 1990 need sealing every 8 – 12 years, especially if the original flex duct has been cooking in 140°F attics through our brutal summers. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family since 2004, and our Duct Sealing team serves Dallas from our Atlanta coordination office with background-checked, uniformed techs who arrive inside the quoted window and price the job in writing before touching anything. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Dallas’s Preferred Duct Sealing Company
We’ve been in this trade long enough to know that Dallas homeowners have seen every pricing trick in the book. That’s why we operate under The Garrison Standard: written price before work starts, 365-Day Done Right Promise backed in writing, and a crew that shows up squared away. Our technicians are background-checked and uniformed; you know who’s walking into your home before they arrive. Phones are answered by a live person 24 hours a day, 7 days a week – no voicemail loops, no callback queues.
Our equipment roster includes Rotobrush rotary brush systems, Nikro negative-air machines, and sealing products from Aprilaire and Abatement Technologies – the same tools commercial crews use, not hardware-store gear. Every job gets before-and-after photos of your own ducts, not stock images. If the seal fails within a year, we come back at no charge. That’s the 365-Day Done Right Promise, and it’s on every invoice we write in Dallas.
Duct Repair in Dallas
Duct Repair in Dallas is what we do when your ductwork is physically damaged – crushed flex runs, disconnected elbows, corroded metal joints, or holes from rodents that got into the attic. In Dallas’s post-1990s suburbs like Frisco and Plano, we see this constantly: flexible ductwork that was never meant to handle 140°F attic temperatures, plus the weight of installers walking across it during construction. The result is flattened runs that choke airflow and force your blower motor to work harder, drawing more amps and shortening its life. A typical duct repair in Dallas runs $280 – $650 for localized fixes, or $800 – $1,500 if we’re replacing multiple crushed runs across a multi-zone system.
Crushed Flex Run Replacement
When a flex duct gets flattened in a hot Dallas attic, sealing around the damage is throwing good money after bad. We cut out the crushed section and install new insulated flex with proper support straps and minimal bends. Our techs use a camera to verify the repair before we close up, and we show you the footage.
Metal Trunk Line Patching
Older Dallas homes, especially pre-war bungalows in Oak Cliff with original galvanized ducts, develop rust holes and separated joints. We patch with galvanized sheet metal and seal with mastic rated for your system’s temperature range, not foil tape that peels off in our humidity.
Air Duct Sealing in Dallas
Air Duct Sealing in Dallas is the precision work of closing leaks at joints, plenums, and connections without replacing the duct itself. We use mastic sealant and mechanical fasteners – not duct tape, which fails in our heat – to stop conditioned air from escaping into the attic and unfiltered attic air from being pulled into your living space. In Dallas’s 1990s-2000s tract-home suburbs, this is mostly about leaky, crushed flexible duct runs in attics that swing past 140°F in summer, not moldy metal trunk lines. Sealing leaky flex there stops attic dust from being pulled into supply ducts and reduces the load on oversized multi-zone systems. Typical air duct sealing in Dallas costs $450 – $1,200 per system, with whole-home multi-zone jobs running toward the higher end.
Camera-Guided Leak Detection
We don’t guess where your ducts are leaking. Our techs run a camera through the system to find the exact points of failure – disconnected elbows at the air handler, gaps where flex meets metal, plenum separations. You see what we see. Then we seal what needs sealing and tell you honestly if a section needs replacement instead.
Static Pressure Verification
After sealing, we measure static pressure and blower motor amp draw to confirm the system isn’t pulling attic air through new leaks we missed. This is how we verify the job before we pack up – not “trust us, it’s better,” but numbers on a report you keep.
Trusted Brands We Service in Dallas
We stock parts and sealing materials from Aprilaire, Abatement Technologies, and Guardsman – brands that hold up in Dallas attic conditions where lesser products degrade fast. Our Atlanta parts hub keeps common flex duct sizes, mastic compounds, and mechanical fasteners on hand, so we’re not waiting on shipping while your system runs half-sealed. For filtration upgrades tied to sealing work, we carry Honeywell and Aprilaire media cabinets that fit standard return plenums. When we seal your ducts, we use the same materials commercial HVAC crews specify, and we explain what each product does for your specific system. No brand dumping – just the right material for your duct type, installed to NADCA standards.
Common Duct Sealing Problems We See in Dallas Homes
- Crushed flex duct in 140°F attics. In Frisco and Plano tract homes, installers often ran flex duct across trusses without proper support. Summer attic heat softens the insulation jacket, and the duct flattens under its own weight or a technician’s foot. Sealing leaks without replacing crushed flex is temporary – the material keeps failing and new sealant pulls away as the attic cools.
- Oversized systems with leaky supply ducts. Many Dallas suburbs got HVAC systems sized for theoretical load, not actual duct capacity. When the blower pushes more air than the duct can carry, pressure forces leaks at every joint. Sealing alone won’t fix an undersized trunk line, but it will stop the system from pulling attic dust into your registers.
- Neglected air handler cabinets and plenum connections. Some crews seal branch runs but miss the big leak at the air handler itself. Unfiltered attic air bypasses your low-MERV filter and recontaminates the supply and return ducts. We seal the cabinet, the plenum, and the connections – the whole pressure boundary, not just the easy spots.
- Per-vent pricing that hides real scope. A Frisco home with three zones might have 30 vents but only three air handlers. Charging per vent ignores that sealing one plenum fixes half the problem. We price per system, so you know what you’re paying for before we start.
Pricing for Duct Sealing in Dallas, GA
Duct sealing in Dallas runs $450 – $1,200 per HVAC system, with most single-system homes falling in the $550 – $850 range. What moves the price: attic accessibility (crawl vs. walkable), duct material (metal trunk lines take longer to seal properly than flex), and whether we’re sealing existing ducts or replacing crushed sections that can’t be saved. Multi-zone homes in newer Dallas suburbs typically have two or three systems, so we price each separately and add them up – no mystery math at the door.
We do not quote per-vent prices. That model incentivizes crews to rush past the hard-to-reach leaks and bill you for every register they touch. Our price is one flat price per system, agreed in writing before work starts, based on what we find during camera inspection. Every estimate is free. Call (361) 326-5060 and we’ll schedule a look.
We Also Serve Cities Near Dallas
Our crews work throughout the Dallas metro, and we regularly schedule Duct Sealing in Dallas alongside jobs in Hiram, Powder Springs, Austell, and Mableton. Same pricing structure, same written guarantee, same equipment roster – whether we’re sealing ducts off Highway 278 or in a subdivision near Powder Springs Road.
Serving Dallas, GA - Our Local Coverage Area
We’re based in the Dallas 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 About Duct Sealing in Dallas
We charge per system, not per vent. A typical Dallas home with one air handler and 12 – 18 vents pays one flat price for sealing that entire system, regardless of vent count. Per-vent pricing often hides the real scope of work and penalizes homes with more registers. Call (361) 326-5060 for a free estimate – we’ll inspect with a camera and give you a written price before any work starts.
Sealing helps if the flex is intact but leaking at joints and connections; it does not help if the flex is crushed or deteriorated from heat exposure. In those cases, we replace the damaged sections and seal the new connections. We determine which you need during camera inspection, and we’ll show you exactly what we found. Call (361) 326-5060 to schedule a look.
Most Dallas homes need duct sealing every 8 – 12 years, though homes with flex duct in unconditioned attics may need attention sooner due to our extreme summer heat cycles. If your energy bills are climbing, rooms aren’t heating or cooling evenly, or you see dust blowing from registers after cleaning, it’s time for an inspection. We do not recommend sealing on a fixed calendar schedule – we recommend it when camera inspection shows measurable leakage.
Low per-vent quotes often exclude the actual work: sealing plenums, replacing crushed flex, or verifying results with pressure testing. The price balloons once the technician is inside. Our price is the full price, written before we start, and it includes camera inspection, sealing of all accessible leaks, and post-job verification. No surprises at the door. Call (361) 326-5060 and we’ll explain exactly what our per-system price covers for your home.
We do not promise same-day service. Duct sealing is a scheduled job that requires camera inspection, written pricing, and typically 2 – 4 hours of attic work. We schedule appointments with arrival windows we honor, not rush jobs that cut corners. Call (361) 326-5060 to book – we’ll get you on the calendar with a firm time and a written quote before any work begins.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Dallas and the surrounding communities since 2004 as part of the Garrison Partners family.