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.
Fast, Reliable Duct Sealing Across Wells Branch
We’re the crew Hollis Air Duct Cleaning sends when a Wells Branch homeowner calls with rooms that won’t heat evenly, dust that keeps coming back, or a recent cleaning that exposed bigger problems in the attic. Our Austin office coordinates scheduling for Wells Branch, and our technicians are usually on-site within a day or two, not next week. We know the area: the loop off Wells Port Drive, the streets around McNeil Road, the two-story homes built during the 1990s boom. That local knowledge matters because Wells Branch isn’t a generic suburb. Its houses went up in a specific window, with specific materials, and they’ve aged in a specific way. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Wells Branch’s Preferred Duct Sealing Company
We’ve been working in Wells Branch long enough to recognize the house styles before we pull into the driveway. The 1980s ranches near McNeil Road with their original attic flex duct. The 1990s two-stories off Wells Port Drive where the upstairs unit was sized for a smaller load than Austin’s summers actually deliver. When a Wells Branch homeowner calls us back, it’s usually because we found something during a cleaning that other crews missed, explained it with a camera photo, and priced the fix in writing before touching a tool.
Our technicians are background-checked and uniformed, and they work under The Garrison Code: arrive inside the window, price in writing, complete the job by the book, leave the site clean. Every repair we make in Wells Branch carries our 365-Day Done Right Promise. If the seal fails or the connection pulls loose within a year, we return and make it right at no charge, including a free second visit. That’s not a slogan. It’s written on every job sheet.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
Air Duct Sealing in Wells Branch
Air Duct Sealing in Wells Branch is often the real fix behind a cleaning job that seemed straightforward. Our Rotobrush source removal pulls decades of pollen and dust from original 1980s – 2000s flex duct, and that process frequently reveals what the debris was hiding: crushed runs, torn collars, and separated joints that were starving rooms of airflow long before the dust became visible. A typical Air Duct Sealing job in Wells Branch runs $450 – $1,200 depending on how many runs need attention and whether we’re repairing connections or replacing damaged flex.
What We Find During Cleaning
In the Wells Branch loop off Wells Port Drive, we cleaned a two-story 1990s home whose upstairs registers were barely moving air. Our camera inspection found a flex supply duct crushed under attic storage and an original collar pulled loose from the air handler; after source removal with our Rotobrush, we sealed the joints and reconnected the run, and the upstairs finally balanced with the downstairs unit. This is common. Original flex duct connections separate as the attic heats and cools, so sealed joints fail at the collar and boots rather than mid-run.
When Sealing Becomes Necessary
Crushed or kinked flex runs under attic storage and low clearances don’t leak at first. They starve whole rooms of airflow until a camera inspection exposes them during a pollen-season clean. Austin’s humidity encourages microbial growth inside original ductwork, and sealing over compromised liner traps odor and spores instead of fixing the source. We won’t seal duct that needs replacement. We’ll show you the photo and explain why.
Duct Sealing Services in Wells Branch
Duct Sealing Services in Wells Branch address the specific failure modes of this area’s housing stock. Most homes here are slab-built, single-family structures from the 1980s – 2000s with attic flex duct systems and heat pumps, often two stories with one unit per floor. Some older homes still have original ductwork showing loose connections and microbial growth from Austin’s humidity. Our Duct Sealing team uses professional-grade mastic and mechanical fasteners to reconnect separated collars, seal boot connections, and repair accessible flex runs. A typical Duct Sealing Services call in Wells Branch runs $450 – $1,200.
Mastic vs. Tape
We use duct sealing mastic, a thick, fiber-reinforced compound that remains flexible after curing. Foil tape degrades in hot attics. Mastic doesn’t. For Wells Branch homes where attic temperatures exceed 140°F in July, this matters. The seal we put down in March is still holding in August.

Equipment We Bring
Our crews carry Nikro negative-air machines for containment during the work, and we source filtration products from Honeywell and Aprilaire when a sealed system needs better protection against the pollen load that Wells Branch’s live oaks deliver every spring. The same tools commercial crews use, explained in plain terms on every job.

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 Wells Branch
We stock parts and materials from Honeywell, Aprilaire, and Abatement Technologies for Wells Branch customers, which means faster turnaround when a seal repair needs a specific fitting or a sealed system needs upgraded filtration. No waiting on a parts run to Austin. Our trucks carry mastic, mechanical fasteners, replacement collars, and flex duct in standard diameters. If your system uses a less common configuration, we’ll source it and schedule the return visit, not leave you with a half-finished job. That’s The Garrison Standard: price it before we touch it, complete it by the book.
Common Duct Sealing Problems We See in Wells Branch Homes
- Original collar separations. The 1980s – 2000s flex duct in Wells Branch homes used connection methods that degrade with attic temperature swings. We find collars pulled loose from air handlers and supply boots, leaking conditioned air directly into the attic instead of the living space.
- Crushed flex runs under storage. Homeowners store holiday decorations and old furniture in attics, often on top of flex duct. A crushed run doesn’t leak; it blocks. The room starves. Our camera finds it during cleaning, and sealing alone won’t fix it. We reroute or replace, then seal the new connection.
- Pollen-compromised duct liner. After a cedar fever spike, techs often find attic flex ducts coated with yellow-green Ashe juniper pollen that blows into living spaces when the heat first kicks on. If the liner is intact, we clean and seal. If it’s degraded, we replace before sealing.
- Microbial growth from humidity. Austin’s humidity encourages growth inside original ductwork. Sealing over compromised liner traps odor and spores. We inspect first. We show you the photo. Then we recommend the right fix, not the easy one.
Pricing for Duct Sealing in Wells Branch, TX
A typical duct sealing job in Wells Branch runs $450 – $1,200. Simple collar reconnections and boot sealing fall at the lower end. Multiple crushed runs, replacement of damaged flex sections, or sealing after a full cleaning push toward the higher end. We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No invoice that balloons once the van is in your driveway.
What affects cost: accessibility of the attic, number of runs needing attention, whether we’re sealing existing duct or replacing damaged sections first, and whether the system needs upgraded filtration after sealing. We take before-and-after photos of your own ducts, not stock images. You’ll see what we found and what we fixed.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Wells Branch
Our Duct Sealing in Wells Branch crews also travel to Houston, San Antonio, Dallas, and Fort Worth for larger projects and multi-system homes. Scheduling and dispatch are coordinated from our Austin office, with local technicians serving each metro area.
Serving Wells Branch, TX - Our Local Coverage Area
We’re based in the Wells Branch 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 Wells Branch
Because Wells Branch is older than most of the Austin suburbs to its south – its homes went up roughly 1980 – 2000 – many still run the original attic flex duct, so debris pulled loose during pollen-season cleaning often reveals crushed runs and torn collars that later need sealing to actually deliver air. After a cedar fever spike, those same original flex runs can be coated yellow-green with Ashe juniper pollen that blows into bedrooms the first time the heat kicks on. Cleaning removes the debris. Sealing fixes the delivery. Call (361) 326-5060 and we’ll inspect both.
Yes. Most duct sealing in Wells Branch homes is done through existing attic access hatches, with no drywall removal. We reach collars, boots, and accessible flex runs from above. If a run is buried under decking or insulation, we’ll show you the photo and explain the access needed before cutting anything. The price is written before we start.
We camera-inspect every system before recommending. If the flex liner is intact and the damage is limited to separated connections, we seal. If the liner is degraded, crushed beyond repair, or showing microbial growth that cleaning won’t remove, we recommend replacement. You’ll see the photo. You’ll get a written price for either option. No pressure either way.
It helps with delivery, not filtration. Sealing ensures the air your system moves actually reaches the rooms it’s supposed to reach, instead of leaking into the attic. If pollen is entering through gaps around the duct connections, sealing blocks that path. For the pollen already in the air, we may recommend upgraded filtration from Honeywell or Aprilaire after sealing. Call (361) 326-5060 and we’ll assess both.
We use professional-grade duct sealing mastic and mechanical fasteners for the seal itself, Nikro negative-air machines for containment during the work, and we source filtration upgrades from Honeywell, Aprilaire, and Abatement Technologies when a sealed system needs better protection. These are the same tools commercial crews use, not hardware-store gear. We explain what each does and why on every job.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Wells Branch and the greater Austin area since 2004.




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