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 Hornsby Bend
Duct sealing in Hornsby Bend typically runs $350 – $850 for a whole-house seal on a standard single-story ranch, and most jobs are scheduled within a few days of your call. If your HVAC is cycling constantly, rooms stay uneven, or that north-wind odor from the biosolids plant finds its way inside even with the windows shut, the problem is often in your ductwork, not your unit. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our crews work Hornsby Bend regularly from our Austin office. Call us at (361) 326-5060 for a written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Hornsby Bend’s Preferred Duct Sealing Company
We’ve been in this trade since 2004, and Hornsby Bend is a market we know well. The housing stock here is distinct, mostly 1980s – 2000s ranches and manufactured homes with original flex duct baking in attics that hit 140°F through July and August. That specific combination, plus the organic particulate that drifts from the Austin Water Hornsby Bend Biosolids Management Plant, creates sealing failures we don’t see the same way in newer Austin subdivisions.
Our technicians are background-checked, uniformed, and expected to operate by The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, leave the site clean. Every repair carries our 365-Day Done Right Promise. If the seal fails or the odor returns within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no callback queues.
HVAC Duct Sealing in Hornsby Bend
HVAC Duct Sealing in Hornsby Bend is the process of closing gaps, disconnected collars, and deteriorated joints in your forced-air system so conditioned air reaches your rooms instead of leaking into the attic or crawl space. Most Hornsby Bend homes we work on have original flexible ductwork from the 1990s or early 2000s. The plastic liner cracks, the insulation compresses, and the tape adhesive turns to powder in those hot attics. We seal with mastic, a thick, fiber-reinforced compound that remains flexible after curing, and we test static pressure before and after to prove the fix.
A typical whole-house HVAC duct sealing in Hornsby Bend runs $350 – $650 for a single-story ranch under 2,000 square feet. Larger homes, pier-and-beam construction with under-floor returns, or systems requiring significant reconnection of separated runs can run $500 – $850. We write the price down before we touch anything.
Attic Flex Reconnection and Mastic Sealing
On a slab ranch off Chapman Lane, our techs ran camera inspection on the original 1990s flex in a 140°F attic and found the main trunk disconnected at a collar above the air handler, with three crushed runs sagging off the wye. We reconnected the collar, sealed the plenum and boots with mastic, and tested static pressure before and after. The north-wind smell that used to hit the kitchen stopped that week. This is common work for us in Hornsby Bend.
Static Pressure Testing and Verification
We don’t guess. After sealing, we measure static pressure at the air handler to confirm the system is moving the volume of air it was designed to move. If the numbers don’t improve, we keep looking until we find the leak. That’s part of The Garrison Standard.
Duct Repair in Hornsby Bend
Duct Repair in Hornsby Bend addresses the physical damage that sealing alone won’t fix: crushed flex runs, collapsed insulation, rodent-chewed sections, and plenums that have separated from the air handler cabinet. In Hornsby Bend’s 1980s – 2000s housing stock, we regularly find flex duct that has sagged so severely it kinks at the wye fittings, creating a dead zone where organic dust and pollen collect. Tape won’t hold on a crushed run. The section needs to be replaced or supported, then sealed.
Duct repair in Hornsby Bend typically costs $200 – $450 per section depending on accessibility, with whole-system repairs on larger homes reaching $600 – $900. We use professional-grade materials, including filtration and sealing products from Honeywell and Aprilaire, and we stock common fittings so we’re not waiting on parts.
Crushed Run Replacement and Support
Sagging flex in a hot Hornsby Bend attic doesn’t just leak air, it creates low spots where debris settles. We replace crushed sections with properly supported new flex or rigid duct where appropriate, then seal every joint with mastic. The goal is air that moves, not air that pools.
Pier-and-Beam Return Chase Sealing
Many Hornsby Bend homes on pier-and-beam foundations have long, unsealed return chases running under the floor. These pull in soil vapor, humidity, and yes, odor from the north wind. Sealing only the supply side leaves the return path wide open. We seal these chases with rigid board and mastic, not tape, because tape fails in damp crawl spaces.
Trusted Brands We Service in Hornsby Bend
We carry professional-grade equipment and materials from Nikro, Honeywell, Aprilaire, and Abatement Technologies. That means negative-air machines for controlled dust containment during repair work, rotary brush systems for pre-sealing cleaning when needed, and sealing mastics and filtration products rated for the duty cycle your Hornsby Bend system sees. We stock common duct diameters, collars, and boots locally, so most Hornsby Bend jobs don’t wait on parts. When your system runs eight or nine months a year in this climate, you need materials that hold up to real use, not hardware-store tape that peels in the first summer.
Common Duct Sealing Problems We See in Hornsby Bend Homes
- Disconnected collars at the air handler plenum. The original tape adhesive on 1990s Hornsby Bend flex duct dries out in attic heat, and the collar separates. Conditioned air dumps straight into the attic. Your system runs longer, your bills climb, and the kitchen still smells like the plant on a north wind.
- Crushed or sagging flex runs at wye fittings. Poor original support lets flex sag over decades, creating kinks that trap organic particulate from the biosolids plant and restrict airflow to back bedrooms. A quick tape wrap won’t restore the diameter or stop the debris buildup.
- Unsealed pier-and-beam return chases pulling soil vapor and odor. These long under-floor channels were never meant to be return ducts. They’re unsealed framing cavities that connect your air handler to everything under the house, including north-wind airflow from vented crawl spaces.
- Deteriorated boots at ceiling registers. The connection between flex and register boot cracks and gaps over time, especially in manufactured homes with more vibration. We seal these with mastic and mechanical fasteners, not tape that loosens with thermal cycling.
Pricing for Duct Sealing in Hornsby Bend, TX
Whole-house duct sealing in Hornsby Bend typically runs $350 – $650 for a standard single-story ranch under 2,000 square feet. Larger homes, systems with multiple disconnected runs, or pier-and-beam properties needing return chase work generally fall in the $500 – $850 range. Duct repair, when sections need replacement rather than sealing, adds $200 – $450 per run.
What moves the price: accessibility (tight attics take longer), the extent of disconnection versus simple joint sealing, whether we need to clean before we seal, and whether under-floor return work is involved. We inspect with a camera, write the price down, and get your approval before any work begins. The price does not move at the door. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Hornsby Bend
Our Duct Sealing in Hornsby Bend crews also travel to Houston, San Antonio, Dallas, and Fort Worth for larger commercial projects and select residential work. Dispatch and scheduling for Hornsby Bend are coordinated from our Austin office, so local response stays quick and routes stay efficient.
Serving Hornsby Bend, TX - Our Local Coverage Area
We’re based in the Hornsby Bend 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 Hornsby Bend
Your return duct system is pulling outside air through leaks in the ductwork, attic, or under-floor chases, and the blower is distributing that air throughout the house. Sealing the return side, especially pier-and-beam chases and attic return leaks, closes that path. We verify with before-and-after static pressure testing. Call (361) 326-5060 for a free inspection.
Most 1990s flex in Hornsby Bend can be sealed if the plastic liner is intact and the insulation hasn’t collapsed. We camera-inspect first. Disconnected collars and minor cracks get mastic sealing. Crushed, rodent-damaged, or collapsed sections get replaced. We write the scope and price before we start.
Yes, by stopping the infiltration path. Sealing alone doesn’t remove existing dust, but it prevents new organic particulate from being pulled into the system through leaky returns and distributed to every room. We often recommend cleaning before sealing for homes with heavy accumulation.
Cleaning removes what’s already inside. Sealing stops new contamination from entering. If your ducts were cleaned within two years and the dust or odor returned quickly, the problem is likely leakage, not normal accumulation. Our camera inspection shows you exactly where the leaks are. Call (361) 326-5060 to book.
Yes, and it’s critical in Hornsby Bend. Those unsealed chases pull soil vapor, humidity, and north-wind odor directly into your air handler. Sealing only the supply ducts leaves the return path open. We seal chases with rigid board and mastic, then test to confirm the return is drawing only from the intended registers.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Hornsby Bend and the greater Austin area since 2004.