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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Rowlett
Duct sealing in Rowlett typically costs $400 – $900 for a whole-house seal on a standard residential system, with most jobs completed in a single visit. If your utility bills have climbed without explanation, rooms stay unevenly heated or cooled, or you’ve noticed dust blowing from registers after recent rains, the problem is often leaking ductwork in your attic or slab chase.
We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our Duct Sealing crew serves Rowlett from our Dallas-Fort Worth dispatch office. We know the neighborhoods from Lakeview Heights to Waterview to the older homes near downtown Rowlett, and we understand how the black gumbo clay along Lake Ray Hubbard’s east shore treats ductwork differently than the stable soils up in Collin County. When you call (361) 326-5060, a live person answers – day, night, or weekend – and we’ll give you a written price before any work starts.
Why Hollis Air Duct Cleaning Is Rowlett’s Preferred Duct Sealing Company
We’ve been in business since 2004, and our 365-Day Done Right Promise covers every duct sealing job in writing. If the seal fails or a leak reopens within a year, we come back and make it right at no charge, including a free second visit. That promise matters in Rowlett, where attics bake past 140°F in summer and clay soil movement tests every repair.
Our technicians are background-checked, uniformed, and trained to The Garrison Standard: arrive inside the quoted window, price in writing before touching equipment, complete the job by the book, and leave the site clean. We use professional-grade equipment from Rotobrush and Nikro, plus sealing and filtration products from Abatement Technologies and Guardsman – the same tools commercial crews use, explained in plain terms on every job.
Calls are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday for a homeowner on Chiesa Road or Lakeshore Drive who needs answers about a duct system that’s suddenly blowing attic air into their living room.
Duct Sealing Services in Rowlett
Duct Sealing Services in Rowlett address a specific set of failures caused by our local conditions: clay-shifted slab foundations, heat-degraded attic flex duct, and collar disconnections that let conditioned air escape into hot attics or crawl spaces. A typical whole-house duct seal in Rowlett runs $400 – $900 depending on system size, accessibility, and whether we find crushed or disconnected runs that need repair before sealing can hold pressure. We always perform a pressure test before and after to prove the seal worked.
Pressure-Tested Sealing with Mastic and Tape
We seal supply and return plenums, register boots, and flex duct collars with duct mastic – a thick, brush-applied sealant that stays flexible – reinforced with foil tape rated for high-temperature attics. In Rowlett’s 140°F+ attic conditions, hardware-store tape fails within a season. We use products from Abatement Technologies and Guardsman that are specified for commercial HVAC applications and hold up to North Texas heat cycles.
Collar Reconnection and Flex Repair
Before we seal, we inspect every collar and flex run with a camera. In Rowlett’s slab-on-grade neighborhoods, we regularly find flex duct pulled away from the air handler or crushed where foundation movement has shifted the slab. Sealing a disconnected run is pointless until it’s reconnected and supported. We document everything with photos so you see what we found and what we fixed.
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.
Duct Insulation in Rowlett
Duct Insulation in Rowlett is often the missing piece after sealing. Even a perfectly sealed duct loses efficiency if the insulation wrap has degraded in decades of attic heat. A typical re-insulation job for a Rowlett home runs $600 – $1,400 depending on linear footage and whether we’re replacing R-4 or R-6 flex with modern R-8 insulated duct or adding a secondary insulation blanket to hard duct. We price by the system, not by the foot, and we write it down before we start.
R-8 Flex Replacement and Insulation Upgrades
Older Rowlett homes from the 1980s and 1990s often have R-4 or R-6 flex duct that has baked brittle in the attic. We replace heat-degraded flex with R-8 insulated duct from Nikro-compatible suppliers, then seal every joint before the insulation goes on. The result is cooler supply air in summer, warmer supply air in winter, and less strain on your compressor.
Vapor Barrier Repair for Humid Conditions
Rowlett’s humidity swings mean attic duct insulation needs an intact vapor barrier. When the outer jacket cracks, fiberglass absorbs moisture, compresses, and quits insulating. We strip damaged wrap, seal the duct, and install new insulation with a continuous vapor barrier so condensation doesn’t undo the work.
Trusted Brands We Service in Rowlett
We stock sealing materials, flex duct, and insulation from Abatement Technologies, Guardsman, Rotobrush, and Nikro – professional-grade products, not hardware-store substitutes. For Rowlett homeowners near Lake Ray Hubbard or along Dalrock Road, that means faster turnaround because we don’t wait on parts shipments. Our trucks carry R-8 flex, high-temp mastic, foil tape rated for 200°F, and HEPA filtration equipment so we can seal, insulate, and verify in one visit. When we recommend a product, we tell you who made it and why it fits your specific system, not just that it’s “good quality.”
Common Duct Sealing Problems We See in Rowlett Homes
- Clay-shift disconnection at the air handler collar. After a dry summer followed by heavy fall rain in the Lakeview neighborhood, our crew pulled a camera inspection through the supply and return ducts of a 1990s slab-on-grade home and found a flex run crushed and disconnected at the air handler collar where the clay had shifted the slab. We performed source removal with agitation tools under negative pressure and HEPA filtration, then sealed the disconnected collar and reinsulated the attic flex duct so the system could hold pressure. The homeowner’s insurer accepted our before-and-after documentation plus a post-seal pressure reading, and the system has run clean since.
- Crushed or kinked flex runs under slab-on-grade foundations. In Waterview and the older lakefront pockets, foundation settlement from clay expansion and contraction compresses ductwork in the slab chase. This chokes airflow and creates hidden leaks that sealing alone cannot fix. We diagnose this with camera inspection and airflow measurement before recommending seal versus replacement.
- Heat-degraded sealant failure in 140°F+ attics. Mastic and tape applied to flex duct in the 1990s or 2000s has baked, cracked, and peeled in Rowlett’s brutally hot attics. What was sealed ten years ago is leaking again. We strip old sealant, clean the joint, and reseal with products rated for commercial high-temperature use.
- Post-storm water intrusion and contamination. When heavy rains overwhelm attic vents or slab perimeter drainage, ductwork can take on moisture and microbial growth. Sealing wet or contaminated duct is a mistake. We test, document, and if necessary recommend replacement with full photo documentation for insurance submission.
Pricing for Duct Sealing in Rowlett, TX
A typical duct sealing job in Rowlett runs $400 – $900 for a whole-house seal on a standard 3-ton residential system. Duct insulation replacement adds $600 – $1,400. What moves you within that range: system size (measured in tons and linear footage), attic accessibility, whether we find disconnected or crushed runs that need repair first, and whether you need both sealing and re-insulation.
We do not quote per-vent teaser prices that balloon at the door. We give one flat price per system, agreed in writing before work starts. That price includes the pressure test, the seal, and the documentation. If we find something unexpected – a crushed flex run, a disconnected collar – we show you the camera footage, explain the repair, and give a written add-on price before proceeding. No surprises. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Rowlett
Our crews work throughout the eastern Dallas suburbs. We regularly seal and insulate duct systems in Rowlett, Garland, Sachse, Wylie, and Sunnyvale – anywhere the black gumbo clay and hot attics create the same failure modes we’ve learned to diagnose and fix.
Serving Rowlett, TX - Our Local Coverage Area
We’re based in the Rowlett 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 Rowlett
If your ducts are dry, structurally intact, and simply leaking at joints or collars, sealing is the right fix. If camera inspection shows standing water, mold growth, or crushed/disconnected runs that cannot be repaired, replacement is necessary, and we document everything for your insurer. Call (361) 326-5060 and we’ll inspect before recommending either.
Rowlett’s black gumbo clay soil expands and contracts dramatically with drought-flood cycles, shifting slab-on-grade foundations enough to pull flex duct apart at collars or crush it in slab chases. Stable-soil suburbs to the north don’t experience this same magnitude of foundation movement, so disconnections are far less common there.
Yes, and we use products specified for those conditions. Standard hardware-store tape and mastic fail in Rowlett’s attics. We use high-temperature-rated sealants and tapes from Abatement Technologies and Guardsman that hold up to commercial specifications, and we schedule work in morning hours when possible for technician safety.
We start with a pressure test to establish baseline leakage, then camera-inspect every run. We repair any disconnected or crushed sections, clean and prep all joints, apply mastic and reinforced tape, reinsulate where needed, and perform a post-seal pressure test to prove the system holds. You get before-and-after photos, pressure readings, and a written 365-Day Done Right Promise.
Insurance typically covers sudden water intrusion from storm damage, not gradual leaks or maintenance issues. We document everything – moisture readings, camera footage, pressure tests, and photo evidence – in a format insurers recognize. Many Rowlett homeowners have successfully submitted our documentation for claims after documented storm events.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Rowlett and the Dallas-Fort Worth area since 2004.