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 Humble
We’re the crew Hollis homeowners call when their ducts are leaking conditioned air into the attic, pulling in pollen and road dust, or running up electric bills that don’t match the thermostat setting. Our Duct Sealing team dispatches from our Houston office and serves Humble directly, including the rural stretches off FM 1960, the neighborhoods around Fall Creek and Atascocita, and the older ranch-style pockets near downtown. We know the difference between a subdivision flex-duct job and a property on a gravel county road with an outbuilding shop that needs its own air handler sealed on a separate schedule. If your vents blow weak, your rooms won’t balance, or your filter loads up with caliche dust in a week, call (361) 326-5060. We’ll give you a written price before any work starts, and every seal is covered by our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Humble’s Preferred Duct Sealing Company
We’ve been sealing ducts in the Houston metro since 2004, and Humble’s mix of rapid suburban growth and stubborn rural fringe means we’ve seen just about every failure mode this market can produce. Our technicians are background-checked, uniformed, and expected to operate under The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. That discipline matters more in Humble than in denser markets because rural properties often mean longer drives, harder access, and homeowners who can’t afford a no-show or a price that jumps once the van is in the driveway.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday when your attic is 140 degrees and your AC is running nonstop. We use professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, and we stock sealing materials including mastic, mesh, and collars so we’re not making a second trip because we ran out of the right size.
The 365-Day Done Right Promise applies to every Humble job in writing. If a seal fails within a year, we come back at no charge. That includes a free second visit, not a negotiation. We’ve found that Humble’s combination of attic heat, humidity, and rodent pressure tests our work harder than most markets, so we back it accordingly.
Air Duct Sealing in Humble
Air Duct Sealing in Humble means finding and closing every leak, gap, and disconnected joint in your forced-air system so the air you paid to condition actually reaches your rooms instead of your attic or crawl space. We pressurize the ductwork, locate leaks with smoke or digital detection, then seal with mastic and reinforced mesh at collars, plenums, and any rodent damage. In Humble’s market, a typical whole-house seal runs $450 – $850 for a standard 1,500 – 2,500 square foot home, with larger or multi-system rural properties running $900 – $1,400 depending on access and the condition of the flex duct.
When Sealing Beats Replacement
Most Humble homes built after 1980 have flexible ductwork in the attic. It sags, it degrades, but it rarely needs full replacement if the liner is intact and the leaks are at joints. We seal first and flag replacement only when the duct itself is crushed, water-damaged, or chewed through beyond repair. That saves homeowners the cost of a full re-duct when a targeted seal and rebalance will solve the problem.
What Happens During the Visit
We start with a camera inspection of accessible trunk lines, then pressurize the system to measure total leakage against the square footage you’re conditioning. We show you the numbers. Then we seal, rebalance registers, and retest so you see the before-and-after. For Humble properties on unpaved roads, we also inspect returns for road dust loading that can mask as a duct leak but is actually a filtration problem.
Duct Sealing Services in Humble
Duct Sealing Services in Humble cover the full range of forced-air systems, from single-unit suburban homes around Atascocita to rural properties with separate shop or outbuilding air handlers that need their own sealing cycle. We seal supply and return trunks, branch lines, plenum connections, and boots, using mastic rated for attic temperatures plus fiberglass mesh at high-stress joints. For Humble’s market, detached-garage or outbuilding systems typically add $300 – $550 to the house seal if done same-day, or $450 – $650 if scheduled separately due to access or equipment needs.
Rural Properties Need Separate Intervals
Here’s something we learned the hard way on Humble’s rural fringe: the outbuilding shop unit is on its own air handler, pulling from its own return, and it’s usually exposed to more road dust and pollen than the house because the filter gets changed half as often. Sealing it on the same interval as the house means one system gets attention and the other keeps leaking. We schedule rural outbuildings on their own cycle, typically every 3 – 4 years versus 5 – 7 for the main house, depending on road conditions and filter discipline.

Wood Heat and Hybrid Systems
Some Humble properties, especially older homes and rural spreads, supplement with wood stoves or fireplace inserts. The ash and particulate load is different from standard HVAC dust, finer and more acidic, and it finds every leak in the duct system faster than standard household dust. We inspect for ash staining at leaks and use slightly heavier mastic at joints in wood-heated homes because the thermal cycling is harder on seals.

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 Humble
We seal ductwork connected to every major HVAC brand, and we stock sealing materials and replacement collars for systems commonly found in Humble homes. Our equipment roster includes Rotobrush rotary systems for agitation cleaning before sealing, Nikro negative-air machines for contained debris removal, and filtration products from Aprilaire and Guardsman that we can install at the air handler if your return is pulling in excessive pollen or road dust. For Humble customers, that means fast turnaround. We’re not ordering parts from Dallas or waiting on a distributor. We carry what this market needs because we’ve already seen what fails here.
Common Duct Sealing Problems We See in Humble Homes
- Flex duct collars popping loose in attic heat. Humble’s attics hit 140-plus degrees in summer, and the humidity cycles the metal collars through expansion and contraction until the seal fails. The duct sags away from the boot, and you’re conditioning your insulation instead of your bedroom. We find this constantly in 2000s-era subdivisions where builder-grade installation left minimal slack.
- Rodent chewing reopens sealed runs. Cooler months drive rats into attics, and a sealed branch with no mesh backing is just a soft target. We back every seal with galvanized mesh where rodents are active, because mastic alone won’t stop teeth.
- Outbuilding systems forgotten after the house is sealed. Rural properties often get the main house sealed, then the shop or garage unit keeps leaking for years. The owner doesn’t notice because they’re not out there every day, but the energy cost and dust load accumulate. We flag these separately and schedule them on their own interval.
- Pollen and road dust masking as duct leaks. Humble’s spring pollen plus caliche dust from unpaved roads loads up returns so heavily that homeowners think they have a leak. Sometimes it’s a leak. Sometimes it’s a return pulling from a dusty crawl space or an undersized filter. We test before we seal so we’re not charging you for a problem that needs filtration, not mastic.
Pricing for Duct Sealing in Humble, TX
A typical whole-house duct sealing in Humble runs $450 – $850 for a standard single-system home between 1,500 and 2,500 square feet. Larger homes, multi-story layouts, or systems with extensive rodent damage run $900 – $1,400. Rural properties with outbuilding or shop units add $300 – $550 same-day or $450 – $650 separately. What moves the price: accessibility (tight attic versus walk-in), the condition of existing flex duct, whether we need to replace crushed or chewed sections before sealing, and how many returns need filtration upgrades alongside the seal work.
We do not quote per-vent pricing. We do not bait with a low teaser and add charges at the door. The price is written down before any work starts, and it does not move. Estimates are free. Call (361) 326-5060 and we’ll give you a straight answer on what your system needs.
We Also Serve Cities Near Humble
Our crews work throughout the Houston metro, including Humble and the surrounding communities of Spring, Houston, Channelview, and Galena Park. Dispatch and scheduling are coordinated from our Houston office, with local crews serving each area directly. Whether you’re in a subdivision off FM 1960 or on a gravel stretch toward New Caney, we cover your market with the same written pricing and 365-Day Done Right Promise.
Serving Humble, TX - Our Local Coverage Area
We’re based in the Humble 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 Humble
Every 3 – 4 years for the main house, and every 2 – 3 years for outbuilding or shop systems that pull more road dust and pollen. The double particulate load from caliche dust and pine pollen degrades seals faster and loads filters sooner than in paved subdivisions. Call (361) 326-5060 and we’ll assess your specific road exposure and system layout.
Because it’s on a separate air handler with its own return, usually exposed to more dust and receiving less filter maintenance. Scheduling it with the house means one system gets ignored. We treat outbuildings as distinct systems with their own inspection cycle. Same-day service is available, but the pricing and interval are separate.
It helps by preventing your return ducts from pulling pollen into the system through leaks, but sealing alone won’t stop pollen entering through doors, windows, and normal ventilation. We often pair sealing with upgraded filtration, such as Aprilaire or Guardsman media filters, to catch what sealing can’t block. The combination is what Humble homeowners notice most during peak pollen season.
Wood heat produces finer, more acidic ash that degrades seals faster and stains leak points. We use heavier mastic at joints in wood-heated homes and inspect for ash staining that indicates active leaks. The thermal cycling from wood heat also stresses flex duct more than steady HVAC operation, so we check for collar loosening more carefully.
We retest total system leakage after sealing and show you the before-and-after pressure numbers. If the seal fails within a year, our 365-Day Done Right Promise covers a free return visit to reseal at no charge. We also recommend a visual check at your next filter change – if you’re seeing dust buildup at registers that was gone right after our visit, call us and we’ll reinspect.
We got a call from a homeowner on a gravel stretch off FM 1960 east toward New Caney, where flex supply runs in the attic had pulled loose at two collars and the return was coated in a mat of pine pollen and caliche road dust. Camera inspection showed one rodent-chewed branch near the air handler, so we ran agitation tools under negative pressure with HEPA filtration, sealed the collars and the chew-through with mastic and mesh, then rebalanced the registers. Their outbuilding shop unit was on the same trip – we sealed that trunk too and flagged it as a separate interval from the house.
Humble’s rural fringe properties on unpaved county roads carry a double particulate load – pine pollen plus road dust pulled into return ducts – and outbuilding or detached-garage systems are usually on their own air handler, so they need sealing scheduled separately from the house rather than on the same visit cycle. This isn’t a detail you’ll find on a generic Houston duct cleaning page. It’s the reality of serving Humble’s actual housing stock, from the subdivisions around Fall Creek to the gravel-road properties where the nearest neighbor is a quarter-mile off.
Ready to stop losing conditioned air to your attic and start breathing what your system actually filtered? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate. We’ll give you a written price before any work starts, seal every leak by the book, and back it with our 365-Day Done Right Promise – if it fails, we come back at no charge.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Humble since 2004.




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