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 Corinth
Duct sealing in Corinth typically runs $850 – $2,400 per system depending on accessibility, the number of disconnected runs, and whether mastic or aerosol sealant is used. Most Corinth homes built during the 1990s and 2000s need sealing on flexible-duct branches that have sagged, kinked, or pulled loose at the attic air handler after twenty-plus years of North Texas heat cycling. Our Duct Sealing team dispatches from our Dallas-Fort Worth office and carries the rotary brush systems, negative-air machines, and duct-sealing mastic needed for the larger two-story homes common in subdivisions like Corinthian Palms and Kensington Estates. If you’re smelling musty air upstairs every August or your second-floor system can’t keep up when the heat index hits 100°F, the problem is often in the attic ductwork, not the coil. Call (361) 326-5060 and we’ll send a uniformed, background-checked tech who checks the attic side first.
Why Hollis Air Duct Cleaning Is Corinth’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our reputation in Corinth is built on showing up inside the quoted window and pricing in writing before we touch anything. Homeowners here have seen enough teaser quotes that balloon once the van is in the driveway. We don’t do that. The price is written down. It does not move at the door.
Our crews know Corinth’s housing stock. We’ve sealed ducts in Kensington Estates, Corinthian Palms, and the newer greenbelt lots backing onto Lake Lewisville. We know the flexible-duct branches in these homes were installed during the building boom of the late 1990s and early 2000s, and we know where they fail first: the attic boot, the kink above the garage, the sag where the strap gave way.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. When you schedule Duct Sealing in Corinth, you get a technician who arrives uniformed, background-checked, and accountable to The Garrison Standard: arrive inside the window, price in writing, complete the job by the book, leave the site clean.
Every repair is covered by our 365-Day Done Right Promise. If the seal fails within a year, we return and make it right at no charge, including a free second visit. That’s written on every job, not negotiated later.
Duct Insulation in Corinth
Duct Insulation in Corinth addresses the heat gain and condensation that plague attic duct runs during North Texas summers, when attic temperatures can exceed 140°F and force your HVAC system to work harder for every degree of cooling. Most Corinth homes with second-floor systems over garages lose significant efficiency through uninsulated or poorly insulated flexible ducts, especially in 1990s subdivisions where original insulation has compressed or torn. A typical Duct Insulation job in Corinth runs $600 – $1,800 per system depending on linear footage, attic accessibility, and whether the existing insulation can be supplemented or must be removed and replaced.
When Attic Heat Overwhelms the Duct
In Corinth’s Kensington Estates and Corinthian Palms, we regularly find flexible-duct branches with original insulation that has degraded to a thin, torn layer. The supply air warms before it reaches the vent. Your thermostat keeps calling. The electric bill climbs. Proper insulation with R-6 or R-8 wrap stops that bleed before it starts.
Lake Moisture and Condensation Risk
Homes near the Lake Lewisville greenbelt deal with higher ambient moisture than inland Denton neighborhoods. When cool supply air moves through an under-insulated duct in a humid attic, condensation forms on the exterior. That moisture drips onto ceiling drywall, stains paint, and can encourage mold growth. Insulation is the barrier that prevents it.
HVAC Duct Sealing in Corinth
HVAC Duct Sealing in Corinth fixes the disconnected, leaking, and poorly joined duct runs that waste 20 – 30% of conditioned air in the average home before it ever reaches a vent. In Corinth’s 1990s – 2000s subdivisions, the flexible-duct branches have aged past their design life: straps sag, boots tear at the air handler, and connections loosen from years of thermal expansion and vibration. A typical HVAC Duct Sealing job in Corinth costs $850 – $2,400 per system, with whole-home projects on three-system houses running higher but priced per system so you know exactly what each costs.
The Attic Boot Problem
We check the attic side of the air handler first. In Corinthian Palms and Kensington Estates, a torn or missing boot at the plenum is more common than a dirty coil, and it produces the exact same symptoms: weak airflow upstairs, musty smells, humidity that won’t clear. A tech who doesn’t look here first will sell you a coil cleaning that doesn’t fix the root cause.
Per-System Pricing for Multi-System Homes
Many Corinth homes have three separate HVAC systems: one for the first floor, one for the second, one for a bonus room or garage apartment. Some contractors quote one system and leave the others leaking. We price each system separately in writing, seal each one completely, and document the work so you can verify what was done in attic spaces you cannot access yourself.
Trusted Brands We Service in Corinth
Our vans carry professional-grade equipment from Nikro and Abatement Technologies, plus filtration and sealing products from Honeywell and Aprilaire. We don’t use hardware-store tape or consumer-grade mastic. For Corinth homeowners, that means we can complete most sealing jobs in a single visit without waiting on parts. Our Nikro negative-air machines maintain HEPA-filtered containment during the work, and our Honeywell and Aprilaire filtration products integrate with existing systems when upgrades make sense. If your ductwork needs more than sealing, we stock the components to handle it without a return trip.
Common Duct Sealing Problems We See in Corinth Homes
- Sagging flex branches in Kensington Estates and Corinthian Palms attics. The original straps have failed after twenty-plus years, creating kinks that restrict airflow and collect debris. Sealing over a kink without straightening it wastes your money; the seal fails within a season and the restriction remains.
- Torn boots at the attic air handler on greenbelt homes. Corinth properties backing onto Lake Lewisville pull in more cottonwood pollen and windblown lake silt than inland neighborhoods. That debris loads filters faster and creates pressure spikes that tear duct boots. The musty smell and summer humidity you notice upstairs often starts here, not at the coil.
- Partial sealing on three-system homes. A contractor prices one system, seals what they can reach easily, and leaves the long above-garage second-floor runs and returns unaddressed. The homeowner pays for work they cannot verify and the comfort problem persists.
- Lake-aerosol moisture infiltration in attic returns. The humid subtropical summers around Lake Lewisville, combined with North Texas’ 100°F+ heat indices from May through September, force attic duct systems to handle extreme temperature differentials. Moisture pulled through compromised return seams degrades mastic and loosens tape over time.
Pricing for Duct Sealing in Corinth, TX
Duct sealing in Corinth runs $850 – $2,400 per system for most residential jobs. A single-system home with accessible attic space and standard flexible-duct branches typically falls at the lower end. Three-system homes, long above-garage runs with limited access, or jobs requiring aerosol sealant application for hard-to-reach leaks trend higher. What moves the price: the number of disconnected or torn boots, whether flex branches need re-strapping or replacement, attic accessibility, and whether we find contractor-grade shortcuts from prior work that must be corrected first.
We give one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. You’ll see the line-item cost for each system, the scope of sealing included, and the documentation you’ll receive. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Corinth
Our crews work throughout the Dallas-Fort Worth metro and travel to Corinth regularly from our local office. We also handle duct sealing calls in Houston, San Antonio, Dallas, and Fort Worth with the same written pricing and 365-Day Done Right Promise.
Serving Corinth, TX - Our Local Coverage Area
We’re based in the Corinth 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 Corinth
Each system has its own air handler, duct branches, and attic runs that must be accessed, inspected, and sealed separately. We price per system in writing so you know exactly what each costs and can verify each was completed. Call (361) 326-5060 for a free estimate broken down by system.
Yes. The cottonwood and juniper pollen, plus windblown lake silt, loads filters faster and creates pressure spikes that tear boots and loosen connections. Attic returns on these homes pull in more debris than inland Denton neighborhoods, accelerating wear on twenty-year-old flex duct. Annual inspection is prudent here.
You should receive a written invoice showing each system sealed, the locations addressed, the materials used, before-and-after photos of inaccessible attic work, and your 365-Day Done Right Promise in writing. Per-system documentation is the only way to verify work you cannot see. We provide this on every job.
Often yes, if the cause is a torn boot or disconnected return at the attic air handler rather than a dirty coil. In Corinthian Palms and Kensington Estates, we find this exact scenario repeatedly: the upstairs smells musty every August, the coil is clean, but the attic boot is torn and pulling humid attic air into the system. Sealing it properly under negative pressure with HEPA filtration fixes the symptom at the source.
Yes. When 20 – 30% of your conditioned air leaks into the attic before reaching vents, your system runs longer and still can’t maintain setpoint. Sealing the ducts restores the airflow the system was designed to deliver, so it cycles normally even when North Texas heat indices push past 100°F. Call (361) 326-5060 to schedule an inspection before peak summer.
Ready to stop losing conditioned air to your attic? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free, written estimate on duct sealing in Corinth. We’ll arrive inside the quoted window, price the work in writing before we start, and back every seal with our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Corinth and the Dallas-Fort Worth area since 2004.