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 Coppell
Duct sealing in Coppell typically runs $400 – $1,200 for a whole-house seal on standard residential flex-duct systems, with most jobs completed in a single visit. If your upstairs bedrooms won’t hold temperature or your electric bill spikes every July, the culprit is often leaky attic ductwork that’s been degrading since your home was built.
We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and we’ve been sealing and restoring duct systems since 2004. Our Duct Sealing in Coppell crews dispatch from our Dallas-Fort Worth office and carry the tools to repair aging flex duct, reattach pulled collars, and seal leaks with mastic and mesh – not tape that fails in attic heat. Coppell’s housing stock is overwhelmingly 1980s – 2000s suburban construction, so a large share of the duct systems are original flex-duct runs in attics that have already been through 20+ North Texas summers. That means the core local value proposition is restoring airflow and sealing leaks in aging flex duct rather than cleaning brand-new systems – something neighboring newer cities don’t see as much.
Calls are answered by a live person, 24 hours a day. When you’re ready, dial (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Coppell’s Preferred Duct Sealing Company
We’ve built our reputation in Coppell by showing up inside the quoted window, pricing in writing, and leaving the site clean. That’s The Garrison Standard, and it applies to every job we run in this market.
Our technicians are background-checked and uniformed – you know who’s walking into your home before they arrive. We don’t send day laborers or subcontractors. Each tech carries professional-grade equipment from Rotobrush and Nikro, plus sealing materials rated for the 140°F+ temperatures your attic reaches in August.
The 365-Day Done Right Promise covers every duct sealing job we do in Coppell. If the seal fails, the airflow drops, or a collar pulls loose within a year, we come back and make it right at no charge. That includes a free second visit, not a negotiation.
Our phones are answered by a live person 24/7. No voicemail loops, no callback queues, no waiting until Monday when your upstairs is 85°F on a Saturday night.
Duct Repair in Coppell
Duct Repair in Coppell usually addresses the physical damage that 20 – 30 years of attic heat has inflicted on original builder-installed flex duct. We’re talking about crushed runs behind knee walls, kinked lines in tight second-floor chases, and collars that have pulled completely off the trunk line. Repair costs typically fall between $250 – $800 per run, depending on accessibility and whether the trunk itself needs attention.
Crushed and Kinked Flex Runs
In the two-story brick traditional homes common throughout Coppell’s 1990s neighborhoods, flex duct often gets compressed behind knee walls or pinched where builders routed it through narrow chases. The seal at the collar looks intact, but airflow never reaches the register. We open the chase, restore the full duct diameter, and secure the run so it stays open.
Collar Reattachment and Reinforcement
Heat degradation causes the inner liner of flex duct to separate from the insulation and outer jacket, especially at connection points. We cut back damaged material, reattach with mechanical fasteners, then seal with mastic and mesh for a joint that outlasts the next decade of summers.
Air Duct Sealing in Coppell
Air Duct Sealing in Coppell focuses on the leaks and gaps that develop where flex duct meets metal collars, where trunk lines intersect, and where register boots penetrate drywall. A typical whole-house seal runs $400 – $1,200, with single-zone or partial-system work starting around $250. We use mastic – a thick, brush-applied sealant – plus reinforcing mesh at stress points. Tape alone fails; we don’t use it.
Mastic Sealing at Joints and Collars
Mastic remains flexible after curing, which matters in Coppell attics where daily temperature swings of 40°F or more stress every joint. We brush it on thick at every connection, then embed mesh tape at high-stress collars. The result is a seal that moves with the duct instead of cracking.
Static Pressure Testing After Sealing
We measure airflow before and after every seal. If static pressure drops but still reads high, we know there’s a kink or crushed run we haven’t found yet. This verification step prevents the callback that cheaper outfits seem to accept as normal.
Trusted Brands We Service in Coppell
We stock parts and materials from Aprilaire, Abatement Technologies, and Guardsman – brands that spec their products for the temperature extremes and pollen loads of North Texas attics. For Coppell homeowners, that means faster turnaround because we’re not ordering parts from a warehouse two counties away. When we find a failed component during your duct sealing job, we replace it with material rated for the conditions your attic actually experiences. Our equipment roster includes Rotobrush rotary systems and Nikro negative-air machines, the same tools commercial crews use, maintained to The Garrison Standard.
Common Duct Sealing Problems We See in Coppell Homes
- Disconnected flex at second-floor chases. We were dispatched to a two-story brick traditional off Parkway Boulevard where the upstairs bedrooms wouldn’t cool below 82°F even with the thermostat set to 74. Our tech ran a camera inspection inside the second-floor chase and found a disconnected flex run at the collar – the duct had literally pulled apart from years of 100°F+ attic heat cycles. We reattached and sealed the run with mastic and mesh, then balanced the supply registers; static pressure dropped and the upstairs finally held temperature.
- Crushed or kinked runs behind knee walls. Flex duct that is crushed or kinked behind knee walls in 1980s-1990s two-story chases, so the seal itself looks fine but airflow never reaches the register. The homeowner feels “weak air” and assumes the AC is undersized; in reality, the duct is pinched flat behind drywall.
- Collar pull-off from heat degradation. Condensation and heat degradation causing flex duct to pull off the collar at the air handler or trunk takeoff – sealing the joint without checking the collar reattachment leaves the leak intact. We always verify the mechanical connection before applying mastic.
- MERV rating mismatch after sealing. Failure to verify MERV rating compatibility after sealing – adding a higher-MERV filter to a now-restricted older flex system can starve the blower motor and undo any airflow gains. We check your filter specs against system capacity as part of every job.
Pricing for Duct Sealing in Coppell, TX
Whole-house duct sealing in Coppell typically costs $400 – $1,200. Single-run repair or spot sealing runs $250 – $800. What moves the number: how many runs need attention, whether we need to open chases or knee walls, and if any collars or boots require replacement.
We give you one flat price per system, agreed in writing before we touch anything. No per-vent pricing. No add-ons at the door. The price we write down is the price you pay.
Every estimate is free. Call (361) 326-5060 and we’ll schedule a tech to inspect your attic ductwork, identify the leaks, and hand you a written quote you can compare without pressure.
We Also Serve Cities Near Coppell
Our Duct Sealing crews regularly work in Lewisville, Carrollton, Grapevine, and Addison – but Coppell’s 1980s – 2000s housing stock presents a specific set of challenges we know well. If you’re in one of these neighboring cities and your home shares that same vintage of builder-grade flex duct, the same pricing and standards apply.
Serving Coppell, TX - Our Local Coverage Area
We’re based in the Coppell 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 Coppell
Seal after cleaning, or do both in the same visit. If your 1998 flex duct has 25+ years of accumulation, sealing over debris traps it against the mastic and shortens the seal life. We inspect first and recommend the sequence that makes sense for your system. Call (361) 326-5060 and we’ll assess both needs on one trip.
In Coppell’s two-story homes from the 1980s – 1990s, the upstairs flex runs are typically longer, more restricted in chases, and subject to greater attic heat exposure. A disconnected or crushed second-floor run is the most common cause we find. Camera inspection confirms it, and repair plus sealing usually restores balanced cooling.
Yes. Leaky attic ductwork in Coppell’s 100°F+ summers forces your AC to run longer to compensate for cooled air escaping into the attic. A properly sealed system can reduce runtime significantly, though exact savings depend on leak severity and home size. Most homeowners notice the difference in comfort first, then see the bill drop.
Repair is needed when the duct itself is damaged – crushed, kinked, or pulled off the collar – while sealing addresses intact duct with leaky joints. We use camera inspection to distinguish the two before quoting. If we find physical damage, we’ll show you the image and explain the repair before adding it to the written price.
Spring pollen doesn’t change how we seal, but it does increase demand for full duct cleaning. If you’re sensitive to the heavy tree and grass pollen load that hits Coppell in March and April, consider scheduling cleaning and sealing together so you’re not pulling that load through leaky joints all season. We can book both services in one visit with one written price.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Coppell and the Dallas-Fort Worth area since 2004.