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 Spring
Duct sealing in Spring typically costs $450 – $900 for a full system, depending on how many leaks we find and where they sit. Most jobs take one day, and the difference shows up on your next electric bill and in rooms that finally hold temperature. If you’re noticing dusty registers, upstairs rooms that never quite cool, or a utility bill that keeps climbing, the problem is rarely the AC unit itself. It’s the ductwork leaking conditioned air into the attic. Call Hollis Air Duct Houston at (713) 936-5800 for a written quote before any work begins.
Why Hollis Air Duct Houston Is Spring’s Preferred Duct Sealing Company
We’ve worked in Spring long enough to know what’s behind the walls and above the ceilings in this town’s housing stock. Roy Castellanos leads a crew that understands the difference between a home off Cypresswood Drive and one off Kuykendahl Road. Same suburb on paper, very different duct problems in the attic. Our technicians show up background-checked and uniformed, with the written price agreed to before we touch a single register. That price doesn’t move once the work starts. If a sealed joint fails within a year, the 365-Day Done Right Promise brings us back at no charge. Not negotiated. Automatic.
Spring homeowners call us because they’ve been through the other kind of company. The one that quotes low over the phone, then finds “additional issues” once the tech is in the attic. We don’t operate that way. The Garrison Standard requires arriving inside the quoted window, pricing in writing, completing the job by the book, and leaving the site clean. That’s not marketing language. That’s the operating code every Hollis technician works under.
When you call, a live person answers. Not a voicemail loop, not a callback queue. 24 hours a day, seven days a week. That matters when you’ve got a disconnected duct pulling 140-degree attic air into your supply side on a July afternoon in Spring.
Styles & brands we work with
Air Duct Sealing in Spring
Air Duct Sealing in Spring means finding every point where conditioned air escapes before it reaches a room, then closing those gaps with mastic or foil tape rated for HVAC systems. In a Spring home, the most common culprits are original flex ducts from the 1990s whose inner liner has torn, or joints at the plenum that have shifted as the ground beneath the slab moved. We inspect every accessible run, seal what’s leaking, and verify the repair with negative pressure testing so you know the system holds.
What We Find in Attic Runs
Flex ducts sag. It’s just what they do after 15 or 20 years in a hot attic. When they sag, the inner liner tears and lets conditioned air spill into unconditioned space. That’s money blowing through your roof. In Spring’s climate, where the attic can hit 130 degrees in August, the damage accelerates. Sealing those runs with mastic, then re-supporting them so they don’t sag again, is the fix that lasts.
The Plenum and Return Side
The plenum is the metal box where your ducts connect to the air handler. In slab-on-grade Spring homes, especially east of I-45 where clay soil moves, those connections shear. The result is a gap that pulls attic humidity into your supply air. We seal those joints with a purpose-built mastic that remains flexible enough to handle normal thermal expansion, then test the system under pressure to confirm the repair.
Duct Sealing Services in Spring
Duct Sealing Services in Spring covers three distinct jobs: sealing supply leaks, sealing return leaks, and repairing disconnected or crushed runs. You might only need one of the three. Or all of them. The pricing sits between $450 and $900 for a typical single-family home, with the higher end reflecting systems with multiple failures or hard-to-reach attic sections. We never quote a per-vent price. You get one flat price for the entire system, written down before work begins.
Supply Side Sealing
This is the air leaving your AC. When supply ducts leak, you’re cooling the attic. In Spring’s summer heat, that waste compounds fast. We seal every accessible joint from the plenum to the register boot, which typically reclaims 15 to 30 percent of lost airflow in homes we test.
Return Side Sealing
The return side pulls air back to the system. A leak here doesn’t just waste energy. It pulls in whatever surrounds the duct. In a Spring attic, that means fiberglass insulation, dust, and humid outside air. Sealing the return restores proper filtration and keeps your indoor air from picking up attic particulate.
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 Spring
We service and seal duct systems from every major manufacturer, and our equipment roster includes Rotobrush rotary brush systems and Nikro negative-air machines. That’s the same professional-grade gear commercial crews use, not hardware-store rental tools. For filtration add-ons, we carry and install products from Honeywell and Aprilaire. When a Spring homeowner needs a media cabinet upgrade along with their duct sealing, we keep the most common sizes on the truck. That means the job gets done in one visit instead of two.
Common Duct Sealing Problems We See in Spring Homes
- 1990s flex ducts with failed inner liners. The outer jacket looks fine from a distance, but the inner liner has torn and air is bypassing the seal. We find this constantly in Gleannloch Farms and other neighborhoods built in that era.
- Clay soil movement shearing plenum joints. East of I-45 in areas like Cypresswood, the expansive clay expands and contracts seasonally. That motion works on duct connections until they open up. Homes on slab foundations with the air handler in a first-floor closet are especially prone.
- Crushed return ducts in halls and closets. Stored boxes, luggage, holiday decorations. Homeowners stack things against hallway return ducts, the duct wall collapses, and the system starts pulling negative pressure that sucks pollen from outside through any crack it can find.
- Disconnected flex runs in attics. Vibration, gravity, and time loosen the zip ties and tape holding flex duct to its collar. One disconnected run in a two-story Spring home means one zone of the house never gets the air it should.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Spring, TX
A typical whole-system duct sealing job in Spring runs $450 – $900, and most homeowners pay right around $650 once we’ve located and sealed the accessible leaks. What moves that number is the number of failures, the type of ductwork, and whether the attic space allows working access without removing decking or stored belongings. We don’t charge per vent. We don’t quote a teaser price and pad the invoice once the tech is inside. The price is written down, agreed to, and locked before tools come off the truck. Call (713) 936-5800 for a free estimate on your Spring home, and we’ll walk you through exactly what we’d seal and what it costs.
We Also Serve Cities Near Spring
Hollis Air Duct Houston runs crews through Spring daily and also serves Humble, Houston, La Porte, and Baytown. If you’re just outside Spring and wondering whether we cover your street, call and ask. Our Duct Sealing team coordinates scheduling from the Houston office, and we’re in the Spring area most days of the week. The same written pricing and 365-Day Done Right Promise applies no matter which side of the city limits you’re on.
Serving Spring, TX - Our Local Coverage Area
We’re based in the Spring 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 Spring
You’ll notice rooms that never reach the thermostat setpoint, dust accumulating quickly after cleaning, and a cooling bill that climbs year over year with no change in usage. In Spring, the fastest tell is an upstairs zone that stays 5 to 8 degrees warmer than the downstairs in summer. That’s almost always a duct leak or disconnection, not a dirty coil. Call (713) 936-5800 and we’ll run a camera through your system to confirm before quoting any sealing work.
Homes built in those neighborhoods carry original ductwork from the 1990s and early 2000s, which means two decades of thermal stress in attic spaces that routinely exceed 120 degrees. Add the clay soil movement east of I-45 that works on plenum connections, and leaks are more common there than in newer construction. Sealing is the difference between conditioning your living room and conditioning your attic.
Yes. We seal from the inside at every accessible joint using mastic applied through register openings and attic access points. Wall cavities and enclosed chases stay intact. In most Spring homes, all the critical leaks are in the attic runs and at the plenum, both of which we can reach without cutting into finished surfaces.
We saw this recently in Gleannloch Farms: a two-story tract home with uneven cooling upstairs. The camera found a flex duct that had come off its collar completely, sagging under its own weight and pulling humid attic air straight into the supply side. That means the upstairs system was blowing 130-degree attic air, not conditioned air. We reconnected and sealed the run with mastic, then verified it held with negative pressure testing. The blower ran less, and both zones finally balanced. That’s a $600 repair in most Spring attics, and it pays for itself in one summer of corrected airflow.
Every three to five years, or immediately if you notice a room that stops cooling the way it used to. Spring’s temperature swings and soil movement can loosen even a well-sealed joint over time. We include a free second visit if a sealed joint fails within the first year under the 365-Day Done Right Promise, and we can set up a reminder cadence so a quick inspection becomes routine maintenance, not an emergency repair. Call (713) 936-5800 to schedule an inspection.
Call Hollis Air Duct Houston for Duct Sealing in Spring
If your Spring home has original ductwork, uneven cooling, or a utility bill that’s climbing faster than your neighbors’, you likely have leaks worth sealing. We’ll inspect the system, show you what we find on camera, and hand you a written price before any work begins. That price is fixed. If it fails within a year, we come back free. That’s the deal. Call (713) 936-5800 now for a free estimate, or to talk through what you’re seeing in your own home. A live person answers, any hour, any day.
Written by Roy Castellanos, Owner at Hollis Air Duct Houston, serving Spring and surrounding communities since 2004.