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 Cerritos
Duct sealing in Cerritos typically runs $850 – $2,400 depending on how much of your system has failed, and most jobs are finished in a single day. We’re the Duct Sealing team at Hollis Air Duct Long Beach, and we work throughout Cerritos every week, from the tract homes west of the 605 to the two-story neighborhoods near Cerritos Regional County Park. Call (562) 548-7365 and you’ll get a live person who can schedule a camera inspection and give you a written price before any work starts.
Why Hollis Air Duct Long Beach Is Cerritos’s Preferred Duct Sealing Company
Cerritos homeowners call us because the work is done by the Garrison Code: arrive inside the window, put the price in writing before touching anything, finish by the book, and leave the site clean. Roy Castellanos runs our crews, and every technician is background-checked and uniformed. You know exactly who is walking through your door before they arrive.
We’ve worked on hundreds of Cerritos homes, most built between 1960 and 1985. That matters because the failures we find here are consistent: original flex duct that has sagged in tight attics, separated seams, crushed return runs. A crew that only knows new construction will miss what a 1972 California Contemporary hides above its low-pitched roof. We don’t. Every job also carries the 365-Day Done Right Promise in writing. If a sealed joint fails within a year, we return and fix it at no charge, including the second visit itself.
Phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no waiting until Monday. Scheduling for Cerritos is coordinated from our Los Angeles office, and crews serve the city locally.
Styles & brands we work with
Air Duct Sealing in Cerritos
Air Duct Sealing in Cerritos means finding every leak in your duct system and closing it with mastic, metal tape, or replacement of failed sections. In this city, the job usually starts with a camera inspection because so many homes still run their original flex ducts from the 1960s and 70s. Those ducts sag, separate at seams, and crush at bends. Sealing them properly often means re-supporting collapsed runs first, then sealing, then verifying airflow at every register.
Most Cerritos duct sealing jobs run $850 – $2,400. The range depends on how many linear feet of duct need work and whether sections must be replaced rather than sealed.
What the Work Actually Involves
We start with a camera inspection of supply and return runs. Then we clean and degrease every joint before applying mastic. Near the 605 and 91, freeway dust and exhaust residue coat duct surfaces. Mastic applied over that grime will not bond. It peels within months. We clean first, then seal.
When Replacement Beats Sealing
Older flex duct inner liners get brittle from decades of Cerritos temperature swings. If we find a liner that has cracked or torn, sealing the outside will not fix it. That section gets replaced before joint sealing begins. We show you the camera footage so you see exactly what we saw.
Duct Sealing Services in Cerritos
Duct Sealing Services in Cerritos are not one-size-fits-all. A 1975 tract house near Carmenita Road needs different work than a newer two-story near the Cerritos Mall. Our service covers supply and return plenums, branch line joints, flex-to-metal connections, and re-supporting sagging runs in attics and crawl spaces. We use mastic, UL 181-rated foil tape, and replacement flex duct where existing sections have failed beyond repair.
Whole-system sealing in Cerritos starts around $1,200 and can top out near $2,400 on larger homes with multiple localized failures. A targeted repair, like sealing a disconnected branch line above a single room, may run as low as $400 – $700 when we find the problem early with a camera.
Freeway-Side Homes Need More Frequent Work
Homes closest to the 605 and 91 corridors accumulate dust and exhaust particulate faster. That grime attacks duct joints and filter media. We see a pattern of repeated sealing needs in those neighborhoods compared to interior Cerritos streets. It is just what living next to two major freeways does to an HVAC system.
Two-Story Temperature Imbalance
Two-story Cerritos homes frequently run 5 – 8 degrees warmer upstairs. The cause is often leaky supply ducts in walls and attics bleeding conditioned air before it reaches upper-floor registers. Sealing those leaks is frequently the real fix for rooms that never cool properly.
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 Cerritos
We work on all major residential HVAC brands across Cerritos, and we stock common mastic, tape, and replacement flex duct sizes locally so we are not waiting on parts. On jobs involving filtration upgrades, we install and service products from Honeywell, Aprilaire, and Abatement Technologies. Our equipment includes Rotobrush rotary brush systems and Nikro negative-air machines, the same professional-grade tools commercial crews use. That means our technicians can clean and inspect your ducts themselves without outsourcing, so the person who finds a leak is the same person who seals it.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Cerritos Homes
- Sagging attic runs above low-pitched roofs. California Contemporary homes from the 1970s have shallow attic space, and decades of stored boxes compress ducts. Sealing a seam without re-supporting the duct just reopens it within a season.
- Disconnected branch lines hidden above ceilings. Original flex duct connections were often held with tape that dries out and fails. One disconnected kitchen branch line can silently dump half your conditioned air into an attic cavity for years.
- Mastic that never bonded because of freeway grime. Near the 605 and 91, exhaust particulate and dust coat every surface. Previous sealing jobs fail because the joints were never degreased first. We clean every joint before sealing.
- Brittle inner liners in original flex ducts. Cerritos’s warm summers and mild winters create constant thermal cycling. Liners crack. When our camera finds a cracked liner, that section gets replaced before we seal – sealing over a cracked liner just moves the leak.
Pricing for Duct Sealing in Cerritos, CA
A typical whole-system duct sealing job in Cerritos runs $1,200 – $2,400. Targeted repairs on a single failed run cost $400 – $700. Homes with extensive freeway-dust contamination or multiple crushed attic runs can push toward the top of that range because cleaning and re-supporting take additional labor before sealing can begin. The price is written down before any work starts, and it does not move at the door. No per-vent pricing, no teaser coupon that becomes a larger invoice once the van is parked outside. Call (562) 548-7365 for a free estimate and a camera-backed written quote.
We Also Serve Cities Near Cerritos
Our crews serve the surrounding area, including Artesia, Norwalk, Bellflower, and Buena Park. If you’re in any of those cities, the same written pricing, camera inspection, and 365-Day Done Right Promise applies. For service across the region, see Duct Sealing in Cerritos and the neighborhoods we cover locally.
Serving Cerritos, CA - Our Local Coverage Area
We’re based in the Cerritos 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 Cerritos
The answer comes from a camera inspection, not guesswork. If your home was built between 1960 and 1985 and still has its original flex ducts, brittle inner liners are likely. A cracked liner means replacement of that section before sealing. If the liner is intact but seams have separated or the duct has sagged, sealing and re-supporting are usually enough. In Cerritos, we often find a mix: some runs are fine and just need joint sealing, while one or two have failed and need replacement. Call (562) 548-7365 to schedule a camera-backed assessment with a written price.
Freeway proximity means constant exposure to exhaust particulate and ultra-fine dust that enters duct systems faster and coats joints with a greasy film. That film prevents mastic from bonding and accelerates the failure of older tape and sealant. Homes closest to the 605 and 91 corridors show noticeably faster joint failure than interior Cerritos neighborhoods, which is why we degrease every joint before applying mastic. If you live near either freeway, expect a shorter cycle between sealing jobs.
Yes, and it is often the single most effective fix. Two-story Cerritos homes frequently run 5 – 8 degrees warmer upstairs because leaky supply ducts in walls and attics bleed conditioned air before it reaches upper-floor registers. Sealing those leaks forces air to the registers it was meant to reach. The work is done, and the result is measurable with an airflow reading at every register before and after.
NADCA standard sealing for a crawl-space system means accessing every joint, cleaning each connection point until it is free of dust and grime, then applying mastic or UL 181-rated tape so the joint is airtight. In Cerritos, many single-story homes have supply ducts running through crawl spaces, where warm soil moisture and freeway dust combine into a grime that must be cleaned before sealing. We inspect every accessible joint with a camera, document what we find, and verify airflow at each register when the work is done. Call (562) 548-7365 for a written estimate.
The first step is a camera inspection of the entire duct system, supply and return. In a 1975 Cerritos tract home, we expect to find original flex duct that has sagged in the attic, seams that have separated, and possibly a crushed return run where stored items compressed the duct. Without a camera, you are guessing. With a camera, you see exactly what needs sealing, what needs replacement, and what is fine. We write the price down before any work starts, and every job is covered by the 365-Day Done Right Promise in writing. Call (562) 548-7365 to schedule your inspection.
Written by Roy Castellanos, Owner at Hollis Air Duct Long Beach.