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 Southlake
We dispatch our Duct Sealing crews to Southlake from our Dallas-Fort Worth coordination office, and most appointments book within a few days, not weeks. If you live near Timber Creek, in the Carroll ISD corridor, or off Southlake Boulevard closer to the town center, you’re inside our standard service radius. Call (361) 326-5060 for a free estimate.
Southlake homes aren’t like the compact ranches you’ll find in older inner-ring suburbs. Most were built from the 1990s forward, with multiple zones, long attic runs, and flexible duct that moves with temperature swings. That construction style changes how sealing gets done, how it gets priced, and what can go wrong if a crew treats your three-air-handler house like a single-system job. We’ve been working this market long enough to know the difference.
Why Hollis Air Duct Cleaning Is Southlake’s Preferred Duct Sealing Company
We’ve built our reputation in Southlake on showing up inside the quoted window and pricing in writing before any work starts. No estimate that balloons once the technician is inside. That discipline matters especially here, where a typical home runs two to four air handlers and homeowners need to know exactly which systems are included in the scope.
Our technicians are background-checked and uniformed, accountable to The Garrison Code on every job. Phones are answered by a live person 24 hours a day, 7 days a week. And every repair we make carries our 365-Day Done Right Promise in writing: if the seal fails within a year, we return and make it right at no charge, including a free second visit.
We know the local housing stock. We’ve worked in the large-lot subdivisions off Dove Road, in the gated communities near Bob Jones Park, and in the custom builds along the Shady Oaks corridor. That familiarity means we show up knowing what to expect: long flex runs, multi-zone dampers, and attics that hit 140 degrees in July.
Air Duct Sealing in Southlake
Air Duct Sealing in Southlake means closing the gaps, separations, and deteriorated joints in your forced-air system so conditioned air reaches the rooms that need it instead of leaking into your attic or crawl space. The job involves inspecting trunk lines and branch runs, sealing accessible leaks with mastic and foil tape, and documenting static-pressure improvement at each air handler. A typical sealing job on a single system in Southlake runs $450 – $850; homes with multiple air handlers are quoted per system so you know exactly what was done where.
When Sealing Beats Replacement
Flexible duct in Southlake attics degrades from heat cycling and physical disturbance, but full replacement is rarely necessary if the jacket is intact and only the collars or seams have separated. Sealing restores design airflow at a fraction of the cost. We run a camera first to show you what’s actually wrong before we quote.
Timing the Job Around Pollen Season
North Texas cedar pollen peaks in December through January, with elm and oak following in February and March. Sealing a system in January can leave you pulling fresh pollen through newly tightened returns before spring even arrives. We typically advise Southlake homeowners to schedule sealing in late spring, after the major pollen events, so the seal stays clean through the heavy cooling season.
Duct Sealing Services in Southlake
Duct Sealing Services in Southlake cover inspection, leak location, mechanical sealing of accessible ductwork, and written documentation of before-and-after performance at each air handler. The work is done under negative pressure when possible to keep attic debris out of the living space. For a standard single-system home, expect $450 – $850; multi-system homes are priced per air handler, with typical three-system jobs running $1,200 – $2,400 depending on accessibility and run length.
Per-System Pricing and Documentation
We quote each air handler separately because that’s how your HVAC system actually operates. After sealing, you get static-pressure readings logged at each unit, dated, and signed. If your upstairs zone still isn’t pulling its designed CFM next summer, that documentation tells us exactly where to look.
What We Seal and What We Don’t
We seal accessible trunk lines, branch takeoffs, plenum collars, and flex-duct connections. We do not seal inside finished walls or chase leaks buried under insulation without your approval. Everything we touch is photographed and noted on the written invoice.
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.
Trusted Brands We Service in Southlake
We carry sealing and filtration products from Aprilaire, Abatement Technologies, and Guardsman, with common mastics, foil tapes, and collar hardware stocked on every van. That means no waiting on parts for a standard Southlake sealing job. For homes with Aprilaire media filters or Abatement Technologies HEPA bypass systems, we can inspect and reseat those connections while we’re sealing the surrounding ductwork. Most jobs finish in a single visit.
Common Duct Sealing Problems We See in Southlake Homes
- Collapsed per-system quotes. A contractor quotes one whole-house price for a three-air-handler home on Shady Oaks Drive, seals only the easiest accessible system, and the homeowner has no documentation proving the upstairs unit was ever touched. We quote per system and log pressure at each one.
- Tape-only seals in hot attics. Southlake attic temperatures hit 140 degrees in summer. Foil tape adhesive softens and releases under that load. We use mastic as the primary sealant, with tape as mechanical backup, so the repair survives its first August.
- Sealing before cleaning. A crew seals leaky returns that are still coated with cedar pollen film from December. Now that debris is locked inside, the system smells every time the blower cycles, and the coil loads up faster. We inspect and clean first, seal second.
- Ignored zoned-damper interactions. In multi-zone Southlake homes, duct leakage can mask as a damper problem. Sealing the trunk restores proper pressure differential so the damper can actually do its job. We check both before we quote either.
Pricing for Duct Sealing in Southlake, TX
A typical single-system duct sealing job in Southlake runs $450 – $850. Homes with two air handlers usually fall in the $900 – $1,600 range, and three-system custom homes commonly run $1,200 – $2,400. What moves you inside that range: accessibility (crawl space versus walk-up attic), length of flex runs, whether we need to move insulation to reach the trunk, and whether the plenum itself needs resealing.
We give you a written price before any work starts, and that price does not move at the door. No per-vent add-ons, no “we found another leak” surprises. Every estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Southlake
Our crews regularly work Duct Sealing in Southlake and the surrounding communities, including Colleyville, Grapevine, Flower Mound, and Roanoke. Dispatch is coordinated from our Dallas-Fort Worth office, with local routing that keeps drive time short and appointment windows reliable.
Serving Southlake, TX - Our Local Coverage Area
We’re based in the Southlake 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 Southlake
Because most Southlake homes built since the 1990s run three or more air handlers, and each one is a separate system with its own trunk, branches, and static-pressure target. A single whole-house price gives you no way to verify which units were actually sealed. We quote per system, seal per system, and log pressure per system. Call (361) 326-5060 for an exact quote – estimates are free.
In Southlake’s cedar-elm corridors, return grilles can show fresh pollen film within two to four weeks during peak season. A late-spring sealing, after the major pollen events, typically stays clean through summer. A January sealing may need attention again by March. We time the job with you, not just for you.
Often yes, if the imbalance is caused by duct leakage rather than a damper or equipment failure. We see this constantly in Southlake’s large custom homes: the upstairs zone leaks into the attic, never reaches setpoint, and the downstairs unit short-cycles. Sealing restores designed airflow so each zone pulls its share. We verify with before-and-after static pressure.
We apply NADCA assessment protocols to the inspection phase of every sealing job: access panel sizing, system zoning verification, and contamination evaluation. The sealing itself follows SMACNA duct construction standards for sealant application and pressure testing. We explain which standard governs which phase before we start.
You should receive dated, signed static-pressure readings at each air handler; photographs of sealed locations; and a written invoice listing each system by zone and serial number. If a contractor won’t put it in writing, you have no proof the work happened. Our documentation is included on every job, no extra charge.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Southlake since 2004.