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 Stevenson Ranch
Duct sealing in Stevenson Ranch typically runs $450 – $1,200 depending on how many leaks we find and how much of your flex duct has separated at the connections. Most jobs in this area take four to seven hours, and we’re usually in your attic within a few days of your call. If you’re in Stevenson Ranch and your rooms heat unevenly, your energy bill climbs every summer, or you wipe dust off furniture a day after cleaning, call us at (661) 523-0295. Our Duct Sealing crew knows exactly what’s hiding in the attics of these early-2000s tract homes.
Why Hollis Air Duct Santa Clarita Is Stevenson Ranch’s Preferred Duct Sealing Company
We’ve spent years working inside the attics of Stevenson Ranch, from the subdivisions off Hemingway Avenue to the hillside homes near Pico Canyon. What we see is consistent: builder-installed flex duct that was taped, not sealed, and sagging runs that trap dust and choke airflow. Homeowners here don’t need a generic duct company. They need someone who knows the housing stock.
Roy Castellanos runs our crews, and the standard he enforces is what defines Duct Sealing in Stevenson Ranch for us. Every job gets a written price before we touch anything. Every job carries the 365-Day Done Right Promise. If a sealed connection fails within a year, we come back and fix it at no charge. No negotiation, no fine print.
Our technicians are background-checked and uniformed. You’ll know who’s walking into your home before they arrive. That matters to Stevenson Ranch families who’ve dealt with no-show crews or prices that jumped once the ladder went up.
Styles & brands we work with
Duct Repair in Stevenson Ranch
Duct repair in Stevenson Ranch is rarely about one obvious hole. It’s usually a chain of small failures: foil tape that dried and peeled at the supply plenum, a register boot that separated from the floor, a long flex run that sagged and pinched. We find them all with a camera inspection before quoting a dollar figure. A typical repair job here runs $350 – $800 if we’re addressing three to six failed connections.
Sealing Failed Connections
Production builders in Stevenson Ranch’s boom years often connected flex duct to the plenum with foil tape only. No mastic, no screws. In the Santa Clarita heat, that tape bakes and peels. We remove it, apply mastic to every seam, and secure each connection so it stays.
Rebuilding Sagged Runs
Long flex runs from attic-mounted air handlers sag at low points, especially in two-story Stevenson Ranch homes where ducts travel twenty feet or more. We add support straps, replace crushed sections, and restore full diameter so air actually reaches the far bedrooms.
Air Duct Sealing in Stevenson Ranch
Air duct sealing in Stevenson Ranch means finding every gap where conditioned air escapes into a 130°F attic before it reaches your rooms. The work involves a full inspection, mastic or aerosol sealing at separated connections, and pressure-balancing checks once we’re done. Expect to pay $450 – $1,200 for a comprehensive seal on a typical three-to-four-bedroom home in this area.
Mastic vs. Aerosol Sealing
For the torn, separated connections we find in Stevenson Ranch attics, hand-applied mastic works best. It fills gaps up to a quarter inch and stays flexible. If your house shows widespread small leaks, we may recommend an aerosol seal applied under pressure. We explain the difference and write the same price before work begins.
Why Attic Heat Undoes Builder Ductwork
Attics in Stevenson Ranch hit over 130°F by July. Flex duct hardens, cracks at bends, and pulls away from fittings. That’s not neglect; it’s physics. What we do is reseal those connections and, where needed, wrap or replace brittle sections so your system holds the air it’s supposed to deliver.
Trusted Brands We Service in Stevenson Ranch
We work on all the duct systems common in Stevenson Ranch homes, including flex duct paired with builders like Lennox, Carrier, and Rheem, plus filtration brands like Aprilaire and Honeywell. We stock the mastics, tapes, and support hardware these systems need locally, so a Stevenson Ranch job doesn’t wait on a parts truck from across the county. Whether your ducts connect to an Abatement Technologies negative-air machine during cleaning or need new filter media from Guardsman, we’ve handled it before and we’ll handle it in your attic.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Stevenson Ranch Homes
- Builder-grade foil tape at the plenum. Stevenson Ranch’s early-2000s tract homes were mass-produced, and many duct connections at the supply plenum got foil tape only. That tape dries and peels within a few summers, leaving a gap you can stick your fingers through.
- Sagged flex runs from attic air handlers. Long flex ducts in these attics were underslung and loosely supported. They develop low points that collect dust and cut airflow to the rooms at the far end of the run.
- Hardened duct material at bends. The same heat that makes Stevenson Ranch summers brutal also bakes flex duct. It stiffens, cracks, and separates where the run turns toward a register boot.
- Dust infiltration from Santa Ana winds. Fine dust blows in through wall penetrations around supply and return ducts. If the duct has any gap, that dust gets pulled into the system and coats your blower motor and coils. We see this on nearly every early-2000s home we inspect here.
Pricing for Duct Sealing in Stevenson Ranch, CA
A focused duct sealing job in Stevenson Ranch, covering the main leaks at the plenum and three to five register boots, typically runs $450 – $700. A full-system seal on a two-story home with long flex runs and multiple failed connections runs $800 – $1,200. What drives the number is how many connections have failed and how much of the run has collapsed. We price it in writing before we start, and that number doesn’t move. Call (661) 523-0295 for a free estimate based on your actual attic, not a generic worksheet.
We Also Serve Cities Near Stevenson Ranch
Our crews cover all of Stevenson Ranch plus the surrounding Santa Clarita Valley, including Santa Clarita, Castaic, and the northern San Fernando Valley communities of Porter Ranch and Chatsworth. If you’re in any of these areas and your ducts are leaking, call us at (661) 523-0295.
Serving Stevenson Ranch, CA - Our Local Coverage Area
We’re based in the Stevenson Ranch 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 Stevenson Ranch
Because the builder cut corners. Production builders in Stevenson Ranch’s master-planned boom years often left duct connections at the plenum sealed with only foil tape, and they allowed flex runs to sag before drywall was even finished. Construction dust and drywall debris often sat inside those ducts before the first owner turned on the furnace. We’ve sealed newly purchased homes here where the ducts were leaking 20 – 30% of conditioned air into the attic before the original furniture was moved in. A pre-move-in duct sealing and cleaning is a smart investment. Call (661) 523-0295 for a quote.
We run a camera through every run from the air handler to each register boot. In Stevenson Ranch’s two-story homes, where a single flex run can travel twenty feet or more through an unconditioned attic, the camera shows us exactly where the duct sags, separates, or collapses. We also use a physical inspection at the plenum and register boxes, because that’s where builder tape always fails first. You get photos of what we find before we quote a repair.
Yes, and this matters a lot in Stevenson Ranch. Santa Ana winds drive fine dust into your attic through vents and wall penetrations. If your ducts have gaps, the negative pressure in the return side pulls that dust directly into your living space. Sealing those gaps keeps wind-blown dust in the attic where it belongs, not coating your blower motor and furniture. We’ve seen this transform homes on the windward side of Pico Canyon. Call (661) 523-0295 and we’ll show you what’s actually in your ducts.
Duct cleaning removes the dust, debris, and drywall particles that accumulated inside your ducts. Duct sealing closes the gaps where conditioned air escapes and outside dust enters. In Stevenson Ranch, you often need both: the original flex ductwork collects construction debris from day one, and the unsealed connections let that debris-mixed air leak into the attic. We clean first, then seal, and every step is priced in writing before we start.
Four to seven hours for a typical three-to-four-bedroom two-story home. The time goes toward camera inspection, mastic application at every connection, supporting sagged runs, and pressure-balance verification. If we’re replacing collapsed sections or doing a full aerosol seal, expect it to run toward the longer end. We’ll give you a time window and price before work begins, and we’ll keep you posted if anything changes.
Written by Roy Castellanos, Owner at Hollis Air Duct Santa Clarita, serving Stevenson Ranch and the surrounding Santa Clarita Valley.