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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After
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Before
AfterFast, Reliable Duct Sealing Across Mission Viejo
Duct sealing in Mission Viejo typically runs $400 – $1,200 for a whole-house seal on original rigid metal ductwork, and most jobs are scheduled within a few days of your call. We’re the Duct Sealing team at Hollis Air Duct Cleaning, and we’ve worked the tract homes from Madrid to Painted Trails enough times to know what hides in those attic runs. Dispatch and scheduling are coordinated from our Los Angeles office, but our crews serve Mission Viejo locally and know the difference between a 1972 original build and a 1998 second-wave handover. If you’re noticing dust plumes from registers, rooms that never cool evenly, or a blower motor that cycles too hard, call us at (361) 326-5060. We’ll inspect the system, write the price before we touch anything, and seal it by the book.
Why Hollis Air Duct Cleaning Is Mission Viejo’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our 365-Day Done Right Promise means if a seal fails within a year, we come back and make it right at no charge, including a free second visit. That promise is backed in writing on every job, not offered verbally and forgotten.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. They show up inside the quoted window, price the work in writing before any tool comes out of the van, and leave the site clean. That’s The Garrison Standard, and it’s how every Hollis location operates, including the crews serving Mission Viejo.
Phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule.
Duct Insulation in Mission Viejo
Duct Insulation in Mission Viejo addresses a specific problem in this city’s housing stock: original rigid metal ducts running through vented attics that bake to 140°F in July and shed conditioned air before it ever reaches the register. In a master-planned community built mostly between the late 1960s and 1990s, most homes still have those original metal runs, and the flex duct added during attic remodels is often uninsulated or poorly wrapped. We install professional-grade insulation using materials from Abatement Technologies and Guardsman, measured and cut to fit your existing runs without crushing the airflow.
When Attic Heat Steals Your Cooling
In Mission Viejo’s semi-arid Mediterranean climate, a duct run through a vented attic can lose 20 – 30% of its cooling before it hits the room below. We see this constantly in the older tracts near Lake Mission Viejo, where 1970s metal runs sit inches below roof decking with no thermal barrier. Proper insulation wraps the duct in a rated sleeve that keeps the air you paid to cool at temperature until it exits the register.
Insulation Before Sealing, or After
We insulate first when the existing wrap is degraded or missing, then seal the joints. Sealing bare metal that lacks insulation just pushes cooled air faster into a hot attic where it warms anyway. The right sequence matters, and we price both steps in writing before starting.
HVAC Duct Sealing in Mission Viejo
HVAC Duct Sealing in Mission Viejo fixes the leaks, gaps, and disconnected joints that develop in original rigid metal ductwork after decades of heat cycling and occasional rodent pressure. Most homes here were built in planned tracts from the late 1960s through the 1990s, and the majority still run on builder-grade duct systems never retrofitted for efficiency. We seal using mastic compound and mechanical fasteners, not tape that dries and falls off, and we verify our work with a pressure test you can watch.
Joint Integrity Comes First
In older Mission Viejo tracts, we regularly find metal duct joints that have loosened or separated entirely in the attic. Sealing over a disconnected joint traps dust and leaks at the seam. Our protocol: inspect every joint with a camera, reconnect or reinforce as needed, then seal. The price for this repair-and-seal work in Mission Viejo typically falls between $400 and $1,200 depending on system size and accessibility.
Return-Side Sealing
Many crews seal only the supply registers and ignore the return plenum. In Mission Viejo, that’s a mistake. Santa Ana winds pull fine dust and pollen through every unsealed return intake, and a seal that ignores the return side simply restores the dust load within one fall season. We seal both sides and show you the before-and-after pressure readings.
Trusted Brands We Service in Mission Viejo
We carry professional-grade equipment and materials from Rotobrush, Aprilaire, and Guardsman on every Mission Viejo job. Rotobrush rotary brush systems handle the agitation and source removal when ducts need cleaning before sealing. Aprilaire filtration products upgrade the air handler once the system is sealed tight. Guardsman insulation materials wrap the runs we repair. We stock these parts locally, so if your Mission Viejo home needs a specific fitting or filter size, we don’t disappear for two days while parts ship. The same tools commercial crews use, explained in plain terms on every job.
Common Duct Sealing Problems We See in Mission Viejo Homes
- Construction dust and drywall debris in 1980s – 90s handovers. Builders in Mission Viejo’s second wave rarely flushed supply and return ducts before closing. A family in the Madrid tracts near Lake Mission Viejo closed on a 1998-built home last spring; at handover they noticed a chalky drywall-talc smell whenever the AC kicked on, and our camera inspection found the original rigid metal supply and return ducts coated in construction dust and fine drywall debris, with one crushed section in the attic. We ran source removal under negative pressure with HEPA filtration and agitation tools, then sealed the joints and reconnected the crushed run before the family moved in – the blower motor stopped cycling on high and the talc smell was gone.
- Loose or separated metal joints in 1970s – 80s original builds. Decades of heat cycling in Mission Viejo’s vented attics loosen the original slip joints and drive cleats. Sealing without first verifying joint integrity just traps dust and leaks at the seams. We disconnect, clean, reconnect, and seal.
- Crushed flex duct from attic remodels. Many Mission Viejo homeowners added flex duct runs during 1990s – 2000s attic conversions. Flex duct kinks under foot traffic or insulation weight, creating restriction points that mimic a leak. We replace crushed sections with properly supported rigid or flex, then seal the new connections.
- Santa Ana wind infiltration through unsealed returns. Fall and winter dry winds carry fine dust and pollen through every gap in the return-side intake. A seal that ignores the return plenum and filter cabinet simply invites reinfiltration. We seal the entire envelope, supply and return, and upgrade filtration where needed.
Pricing for Duct Sealing in Mission Viejo, CA
A typical whole-house duct seal in Mission Viejo runs $400 – $1,200. Smaller single-zone systems in townhomes or condos with accessible attics fall at the lower end. Larger single-family homes in the Painted Trails or Madrid areas with multiple zones, extensive joint repair, or crushed section replacement reach the higher end. Duct insulation adds $300 – $800 depending on linear footage and attic accessibility.
What moves the price: how many joints need reconnection, whether crushed sections require replacement, if the return plenum needs sealing too, and whether we clean before sealing. We inspect with a camera, write the full price before any work starts, and that number does not move at the door. No per-vent pricing, no teaser coupons that balloon once the van is in your driveway. Call (361) 326-5060 for a free estimate – we’ll quote it honestly and schedule it when you want it.
We Also Serve Cities Near Mission Viejo
Our crews regularly work Mission Viejo and the surrounding communities: Lake Forest, Laguna Hills, Rancho Santa Margarita, and Ladera Ranch. Same standards, same written pricing, same 365-Day Done Right Promise at every stop.
Serving Mission Viejo, CA - Our Local Coverage Area
We’re based in the Mission Viejo 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 Mission Viejo
Builders in Mission Viejo’s 1980s – 90s second wave rarely flushed construction dust and drywall debris from supply and return ducts before handover. That debris has been circulating for 25 – 35 years, coating your blower motor and air handler. Call (361) 326-5060 for a camera inspection and free estimate.
Yes, if the joints are still structurally sound. We inspect every joint with a camera first; if the metal is intact, sealing with mastic restores efficiency and stops attic infiltration. If joints are separated or crushed, we repair then seal. The $400 – $1,200 range covers most Mission Viejo homes.
Santa Ana winds pull fine dust and pollen through every unsealed register, return grille, and filter cabinet gap. A seal that ignores the return side simply restores the dust load within one fall season. We seal both supply and return, then verify with pressure testing.
Builders should have run source removal under negative pressure with HEPA filtration to flush construction dust and drywall debris, then pressure-tested and sealed all joints before occupancy. Most didn’t. We do it after the fact, and we show you the camera footage so you know what was in there.
We seal both. Sealing only the supply registers is half a job. In Mission Viejo’s wind-prone climate, unsealed return intakes are the primary entry point for dust and pollen. Our whole-system seal includes supply runs, return plenum, and filter cabinet – priced in writing before we start.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Mission Viejo since 2004.