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.
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AfterFast, Reliable Duct Sealing Across Stevenson Ranch
Duct sealing in Stevenson Ranch typically runs $850 – $2,400 for a whole-home job, depending on whether we’re patching accessible joints or replacing collapsed flex runs in the attic. Most Stevenson Ranch homes need both cleaning and sealing, since the master-planned community’s 1980s and 1990s tract construction left original ductwork now 25 – 40 years old. We’re familiar with the area, from the hillside sections off Pico Canyon Road to the flatter tracts near Stevenson Ranch Parkway, and we dispatch crews from our Los Angeles office to reach Stevenson Ranch properties inside our quoted arrival windows. Call (361) 326-5060 for a free estimate, written before any work starts.
Why Hollis Air Duct Cleaning Is Stevenson Ranch’s Preferred Duct Sealing Company
We’ve been sealing ducts in Stevenson Ranch long enough to recognize the patterns. The same builder, the same materials, the same installation methods across entire tracts mean we often find identical failures on the same street. That repetition is an advantage for homeowners, not a drawback. We know where to look first.
Our technicians arrive in uniform, background-checked, and equipped with professional-grade tools from Nikro and Abatement Technologies. Every job gets a written price before we touch anything, and every repair is backed by our 365-Day Done Right Promise. If the seal fails within a year, we return and make it right at no charge, including a free second visit. That’s written on every invoice, not implied.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. Scheduling is coordinated from our Los Angeles office, but the crew that shows up knows Stevenson Ranch’s specific housing stock and what to expect in your attic.
Duct Insulation in Stevenson Ranch
Duct Insulation in Stevenson Ranch addresses a problem most homeowners don’t discover until their summer electric bills spike or their second floor won’t cool down. The original fiberglass duct wrap or foil-faced insulation installed in the 1980s and 1990s has compressed, torn, or fallen away entirely, exposing metal ductwork to attic temperatures that regularly exceed 140°F in July and August. When conditioned air travels through uninsulated or poorly insulated ducts, it gains heat before it reaches your registers. Your system runs longer, works harder, and still delivers lukewarm air upstairs.
A typical duct insulation job in Stevenson Ranch runs $600 – $1,800, depending on linear footage and whether we’re reinsulating existing metal ducts or wrapping new flex runs after sealing. We use professional-grade materials rated for California attic conditions, not the hardware-store rolls that sag within two seasons.
Attic Heat Gain in Hillside Homes
The larger homes in Stevenson Ranch’s hilly sections off Pico Canyon Road and The Old Road often have longer duct runs and more complex attic layouts. More surface area means more opportunity for heat gain. We calculate insulation R-value by run length and exposure, not by blanket coverage.
Matching Insulation to Sealed Systems
Insulating before sealing is putting a jacket on a leaky pipe. We seal first, pressure-test, then insulate the repaired runs. That sequence matters. A sealed, insulated duct delivers air at the temperature your HVAC unit produced, not the temperature your attic imposed on it.
HVAC Duct Sealing in Stevenson Ranch
HVAC Duct Sealing in Stevenson Ranch is rarely a simple matter of slapping tape on a joint. The original builder-grade duct tape has dried and cracked. Boot-to-drywall connections have pulled apart as the house settled. Flexible duct runs have collapsed or kinked where they were strung too tight across trusses. We find all three problems in most Stevenson Ranch attics we enter.
Whole-home HVAC duct sealing in Stevenson Ranch typically costs $850 – $2,400. A straightforward joint-sealing job on accessible metal ductwork falls at the lower end. Replacing multiple collapsed flex runs, rebuilding boot connections, and sealing from the inside with aerosolized mastic pushes toward the upper end. We inspect with cameras, quote in writing, and show you what we found before we proceed.
Negative-Pressure Testing After Sealing
We pressurize the sealed system and measure leakage at the duct blaster. California Title 24 standards give us a benchmark. We don’t guess whether the seal held. We prove it with numbers.
Mastic vs. Tape for Lasting Seals
Duct tape is a misnomer; it fails in attics. We seal joints with water-based duct mastic, reinforced with foil tape where mechanical stress requires it. Mastic remains flexible, fills irregular gaps, and lasts the life of the ductwork when applied correctly.
Trusted Brands We Service in Stevenson Ranch
Our crews carry professional-grade equipment from Nikro, Abatement Technologies, and Honeywell, the same tools commercial HVAC contractors use in hospitals and schools. For Stevenson Ranch homeowners, that means we don’t need to order parts or rent specialty equipment when we find collapsed flex duct or failed boot seals. We stock the replacement materials and filtration components to complete most jobs in a single visit. Our Los Angeles office maintains inventory for the Santa Clarita Valley market, so turnaround on standard repairs is same-week, not next-month.
Common Duct Sealing Problems We See in Stevenson Ranch Homes
- Cracked builder-era duct tape at every joint. The duct tape installed in Stevenson Ranch’s 1980s and 1990s construction was never rated for attic heat. After three decades, it has dried to a brittle shell that flakes away when touched, leaving every joint leaking conditioned air into the attic.
- Collapsed flex duct runs in the attic. The flexible duct typical of Stevenson Ranch’s tract build era was strung across trusses with minimal support. Sagging, kinking, and complete collapse are standard findings, especially in the longer runs serving second-floor registers.
- Unsealed boot-to-drywall connections pulling away. As Stevenson Ranch homes settled over 25 – 40 years, the metal boots connecting ductwork to ceiling registers have separated from the drywall. Conditioned air leaks into wall cavities; attic air gets drawn into the return side.
- Drywall dust and construction debris coating the duct interior. Builders in Stevenson Ranch’s master-planned phase rarely cleaned ducts before handover. Fine gypsum powder from original construction remains in the system, circulating through registers and accelerating seal degradation at joints.
Pricing for Duct Sealing in Stevenson Ranch, CA
Whole-home duct sealing in Stevenson Ranch runs $850 – $2,400. Joint sealing and mastic application on accessible metal ductwork: $850 – $1,400. Replacement of collapsed flex runs, boot rebuilding, and full system sealing: $1,600 – $2,400. Duct insulation as an add-on or standalone service: $600 – $1,800. These are whole-system prices, not per-vent teaser rates that balloon once the technician is inside your home.
What moves the price: accessibility of the attic, linear footage of ductwork, number of collapsed runs requiring replacement, and whether we perform source removal cleaning before sealing. We quote every factor in writing before work begins. The price does not move at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Stevenson Ranch
Our crews regularly work in Stevenson Ranch and the surrounding Santa Clarita Valley, including Santa Clarita, Castaic, San Fernando, and Simi Valley. If you’re outside Stevenson Ranch city limits but within the broader service area, we apply the same written pricing, same 365-Day Done Right Promise, and same arrival window commitment. Our Duct Sealing team coordinates dispatch from Los Angeles to reach all listed communities.
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
Yes. The construction debris and drywall dust left in 1980s Stevenson Ranch ducts at handover will compromise any seal you apply over it. We perform source removal under negative pressure first, then seal clean surfaces. Call (361) 326-5060 and we’ll inspect with a camera to show you what’s inside.
Stevenson Ranch’s master-planned construction used the same builders, same materials, and same installation methods across entire tracts. When one home’s flex duct collapses after 30 years, the identical run in the house next door is at the same point in its lifespan. We often find the same failure pattern on three consecutive streets.
No. California banned asbestos in duct insulation in 1975, and Stevenson Ranch was built almost entirely after that date. The original fiberglass or foil-faced insulation in your attic contains no asbestos, unlike older parts of Los Angeles County. We still test when we encounter unusual materials, but it’s not a standard concern here.
Yes, significantly. Sealed return ducts don’t draw unfiltered air from the attic or wall cavities during smoke events. With wildfire smoke from the Angeles National Forest routinely infiltrating homes in this area, a sealed system combined with proper filtration reduces particulate intake. We can recommend Honeywell or Aprilaire filtration upgrades during your sealing appointment.
We can, and we often recommend it. Even new construction in Stevenson Ranch typically has unsealed boot joints, gaps at the air handler connection, and construction debris throughout the duct system. The builder’s HVAC subcontractor rarely performs detailed sealing or cleaning. A post-construction seal and clean ensures you start with a system that delivers designed airflow and doesn’t circulate drywall dust for the first two years.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Stevenson Ranch since 2004.