Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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 Atascocita
Duct sealing in Atascocita typically costs $450 – $1,200 per system depending on how many leaks we find and how many runs need repair. Most jobs are completed in a single day. If you’ve noticed upstairs bedrooms that never quite cool down, a musty smell that returns after cleaning, or dust building up fast on furniture, the problem is often air escaping through gaps and disconnected joints in your ductwork. Our crews know Atascocita homes well, because we’re in them every week. Call (713) 936-5800 for a written quote before any work begins.
Key Takeaways
- Duct sealing in Atascocita runs $450 – $1,200 per system, quoted in writing before we start.
- Two-story homes built in the 1990s and 2000s often have separate upstairs and downstairs air handlers, and the upstairs ducts are usually the leakiest.
- Sealing is frequently the real fix after a cleaning reveals disconnected or crushed flex duct in the attic.
- Every Hollis Air Duct Houston job is covered by our 365-Day Done Right Promise in writing.
- Call (713) 936-5800 and you’ll reach a live person, not a voicemail tree.
Styles & brands we work with
Why Hollis Air Duct Houston Is Atascocita’s Preferred Duct Sealing Company
We’re the Duct Sealing team Atascocita homeowners call when they want the job priced before the van shows up. Hollis Air Duct Houston is part of the Garrison Partners family, founded in 2004, and we run every job on The Garrison Standard: arrive inside the quoted window, put the price in writing, do the work by the book, and leave the site clean. Roy Castellanos leads our crews, and he holds every technician to the same standard on every job.
Atascocita customers tell us the same thing over and over: they’ve dealt with outfits that quoted one price on the phone and a different one at the door. That doesn’t happen here. The price we write down before we touch your ductwork is the price you pay. Period. Our technicians are background-checked and wear uniforms, so you know exactly who’s walking into your home. And if something isn’t right within a year, we come back at no charge under the 365-Day Done Right Promise. That’s not a handshake. It’s in writing.
Air Duct Sealing in Atascocita
Air Duct Sealing in Atascocita means finding every place your ducts leak conditioned air into the attic and sealing those gaps with mastic or specialized tape, then repairing any disconnected or crushed runs. In a two-story Atascocita home, the upstairs flex duct often sits in attic spaces that hit 130°F or more in July and August. Hot, humid attic air gets pulled into any gap it can find, which means your AC works harder and your upstairs rooms stay muggy. Sealing those leaks is what restores balance.
What we do on a typical Atascocita job: we inspect every accessible duct run, seal joints and boots with commercial-grade mastic, repair or replace crushed flex duct, and then verify airflow with a before-and-after pressure check. You can see the difference in the balance between rooms. It’s not unusual to find 20 – 30% of your cooled air never making it to its intended room.
When do you need this? If cleaning your ducts didn’t fix the musty smell, if some rooms are always five degrees warmer, or if a previous camera inspection showed disconnected runs, that’s the sign. Atascocita’s humidity doesn’t forgive leaky ducts.
Supply and Return Duct Sealing
We seal both the supply ducts that push cooled air into your rooms and the return ducts that pull air back to the blower. A leaky return is worse than most people realize in Atascocita: it pulls hot, humid attic air directly into your system, which forces the AC to work harder and can spike indoor humidity. We seal each connection point and replace any flex run that’s crushed beyond repair.
Plenum and Air Handler Sealing
The plenum is the metal or duct-board box that sits right on top of your air handler. In Atascocita homes with slab foundations, the air handler is often in a closet or attic, and the plenum joints are prime leak points. We seal those seams with mastic so the blower isn’t fighting itself. A properly sealed plenum also reduces condensation around the unit, which matters when you’re running the AC nearly year-round.
Duct Sealing Services in Atascocita
Duct Sealing Services in Atascocita are what we offer when a routine cleaning uncovers the real problem underneath: duct runs that have separated, been crushed by attic storage, or were never sealed properly when the house was built. Atascocita’s housing boom in the 1990s and 2000s moved fast, and the original flex ductwork in many of those homes is now 20 – 30 years old. We see the same failures in subdivisions across Atascocita: disconnected boots, tape that dried and let go, and duct runs crushed under boxes.
The cost to seal a single system in Atascocita typically runs $450 – $800. If both the upstairs and downstairs systems need work, that’s usually $900 – $1,200 total. You’ll get a written price before we start, and that price doesn’t move.
Whole-System Duct Sealing
For homes where both air handlers need attention, we price the job as one whole-system project. You’ll know the total before any work starts. Most whole-system jobs in Atascocita are done in a single long day, and we leave your attic cleaner than we found it.
Targeted Leak Repair
Sometimes the problem is one bad run or a single disconnected boot. We’ll camera the run, show you what we found, and quote the repair by itself. No one should pay to seal ducts that don’t need it.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Atascocita
Our crews run professional-grade equipment from Rotobrush and Nikro, and we stock filtration products from Honeywell and Aprilaire for Atascocita customers who want to upgrade while we’re in the attic. What that means for you: we’re not showing up with a shop vac and a hardware-store brush. The Rotobrush rotary brush system agitates debris loose while a negative-air machine pulls it out of the home, and the same negative-air setup helps us verify that sealed ducts are actually tight. For repairs, we keep commercial mastic and replacement flex duct on the truck, so most sealing jobs in Atascocita don’t need a second visit for parts.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Atascocita Homes
- Disconnected or crushed upstairs flex duct. In two-story homes along Atascocita Drive and West Lake Houston Parkway, the upstairs runs live in the hottest part of the attic. Heat and humidity take a toll, and we regularly find ducts pulled apart at the boot. That gap is pulling attic air straight into your bedroom.
- Leaky plenum joints at the air handler. When the blower pulls air through a gap at the plenum, it draws moisture and dust into the system. In Atascocita’s humid climate, that moisture condenses inside the duct and feeds mold growth, especially in older fiberglass-lined duct board.
- Crushed runs from attic storage. Atascocita attics get used for storage. Boxes and holiday decorations end up on top of flex duct, and a crushed run chokes airflow to an entire room. We find this constantly in subdivisions like The Park at Atascocita and Eagle Springs.
- Mold and mildew inside older fiberglass-lined ducts. Years of condensation from leaky joints creates the perfect environment. If you smell something musty that returns after cleaning, the source is often inside the duct lining itself. Sealing and sanitizing together is the fix.
Pricing for Duct Sealing in Atascocita, TX
Here’s the straight answer. Sealing a single duct system in Atascocita runs $450 – $800. A two-system home, which is common in this area because of the separate upstairs and downstairs air handlers, runs $900 – $1,200 total. If we find crushed or disconnected runs that need replacement, that’s factored into the written quote before we start. What moves the number? Access to the attic, how many leaks we find, and whether older fiberglass lining needs sanitizing. You’ll get the full price in writing, agreed before we touch your ducts. Call (713) 936-5800 for a free estimate, and we’ll give you numbers you can plan around.
We Also Serve Cities Near Atascocita
Our crews work throughout the northeast Houston metro, including Duct Sealing in Atascocita and the surrounding communities. If you’re in Houston, Spring, Humble, or League City, we’ll send a background-checked, uniformed technician your way with the same written pricing and the same 365-Day Done Right Promise.
Serving Atascocita, TX - Our Local Coverage Area
We’re based in the Atascocita 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 Atascocita
Musty smells that return after cleaning usually mean the ducts are leaking, and the leak is pulling humid attic air into the system. In two-story Atascocita homes, the upstairs ducts run through the hottest part of the attic. Condensation forms inside the ducts, mold and mildew grow in the moisture, and the smell keeps coming back until the leaks are sealed. Sealing stops the humid air from entering, which dries out the duct interior and ends the smell at the source. Call (713) 936-5800 and we’ll find the leak.
Not always, but in most Atascocita homes both systems benefit. The upstairs system is usually worse because the attic is hotter and the AC runs longer. The downstairs system may only need inspection. We’ll camera each system separately and give you a written quote for exactly what needs work. You won’t pay to seal ducts that aren’t leaking.
We start with a visual inspection of every accessible run, then use a camera to confirm what we see and check inaccessible sections. In 1990s and 2000s construction like most of Atascocita’s larger subdivisions, we’re looking for the flex duct failures common to that era: dried-out tape, separated boots, and runs crushed by storage. We’ll show you what we found before we quote the repair, so you can see the problem with your own eyes.
Yes, and this is one of the biggest benefits in a humid climate like Atascocita’s. Every gap in your return ducts pulls humid attic air straight into your AC system. That moisture condenses on the coil and inside the ductwork, raising indoor humidity and feeding mold growth. Sealing those gaps stops the humid air at the source. Many customers notice the difference within a day or two.
Often yes, especially in Atascocita. The original flex duct in many 2000s-era homes was installed quickly and taped with materials that fail within a decade. We find significant leaks in houses that aren’t old yet. The test is simple: if some rooms are warmer, dust builds up fast, or the system runs constantly in summer, a camera inspection will tell you for sure. The inspection is part of the free estimate, and you’ll see the evidence before you decide.
Why We See Two-Story Atascocita Homes Differently
In Atascocita, most two-story 1990s and 2000s homes have separate upstairs and downstairs air handler units. The upstairs ducts run through hotter attics and cycle longer in summer, so sealing failures concentrate upstairs. That’s why you’ll get musty smells in the bedrooms or uneven cooling upstairs even when the downstairs system feels fine. This pattern is so common in Atascocita that we check the upstairs system first whenever a homeowner describes that exact symptom. The fix isn’t more refrigerant or a bigger unit. It’s sealed ducts.
On a two-story brick home in the Oaks of Atascocita subdivision, our crew found the upstairs supply ducts were crushed and disconnected at several boots after a camera inspection. We sealed all supply and return ducts with the Rotobrush system and patched the crushed runs, restoring balanced airflow and eliminating the hot, humid attic air that had been drawn into the bedrooms. The homeowner went from a 12-degree temperature split between floors to 3 degrees. That’s the difference sealing makes.
Written by Roy Castellanos, Owner at Hollis Air Duct Houston, serving Atascocita with duct cleaning and sealing since 2004.