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 Montebello
Duct sealing in Montebello typically costs between $450 and $1,200 for a standard single-family home, depending on how much of the ductwork is accessible and how many leaks we find. Most jobs are completed in a single day. If you live in one of Montebello’s mid-century stucco homes near Whittier Boulevard or up toward Montebello Hills, you’re likely losing conditioned air through seams and joints that have been open for decades. Call us at (626) 469-5477 and we’ll give you a written price before any work starts.
Why Hollis Air Duct Pasadena Is Montebello’s Preferred Duct Sealing Company
We’re not a national chain. We’re an independently owned and operated part of the Garrison Partners family, and our crews work in Montebello every week. We know what happens when original 1940s galvanized steel ducts sit for 60 or 70 years under a stucco home with a crawl space. The seams corrode, the tape fails, and the system starts pulling dust from places you don’t want to think about. Our technicians are background-checked, uniformed, and expected to follow The Garrison Code on every job: arrive inside the quoted window, put the price in writing before touching anything, and leave the site cleaner than we found it.
Every sealing job carries the 365-Day Done Right Promise in writing. If the work fails within a year, we come back and make it right at no charge. No negotiation, no fine print. That’s the standard Roy Castellanos expects from every crew that carries the Hollis name. Montebello homeowners call us because the price we quote is the price they pay, and because the phone gets answered by a live person every time.
Styles & brands we work with
Air Duct Sealing in Montebello
Air Duct Sealing is the process of closing every gap, crack, and disconnected joint in your duct system so the air your furnace or AC produces actually reaches the rooms it’s meant for. In Montebello, where homes built between the 1940s and 1970s often still run on their original ductwork, this work matters more than in newer neighborhoods with flex duct that hasn’t had 60 years to fail. A typical whole-home sealing job in Montebello runs between $450 and $900 when we’re sealing accessible runs in a crawl space or attic. If we need to replace corroded sections of galvanized steel while we’re in there, that pushes the total toward the $1,200 end.
Sealing Supply Runs and Returns
The supply side is what most people picture: the ducts pushing heated or cooled air out to the registers. The return side is just as important, especially in Montebello. Duct Sealing on both sides means using mastic, a heavy brush-on sealant, plus metal-backed tape on accessible joints. Foil tape alone won’t survive a Santa Ana season.
Duct Sealing Services in Montebello
Duct Sealing Services in Montebello start with a full inspection, not a guess. We run a camera through the main trunk line and branches to find exactly where the air is escaping before we apply a single bead of mastic. For a typical 1950s ranch home between Beverly Boulevard and Montebello Boulevard, expect to pay $500 to $950 for accessible duct sealing. If the system is in a slab foundation where we can only reach the boots and returns, the price lands differently because the buried runs can’t be sealed without excavation. Slab leaks often call for a different repair approach altogether, and we’ll tell you that straight before quoting anything.
Return-Side Sealing and Pressure Correction
Undersized returns are the quiet problem in this city. When the return side can’t pull enough air, the system goes negative, and that negative pressure acts like a vacuum on the crawl space. We fix it by sealing the return plenum, enlarging the drop where the design allows, and balancing the static pressure so dust and moisture stop being pulled past the filter.
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 Montebello
We work with professional-grade equipment from Rotobrush, Abatement Technologies, and Aprilaire because those are the tools that hold up on real job sites, not the gear you grab off a hardware store shelf. Older Montebello homes with original galvanized ducts often benefit from adding a media filter cabinet from Aprilaire once the sealing is done. It’s a simple upgrade that gives you a tighter seal around the filter itself and catches more of the fine dust that blows in during Santa Ana winds. We keep our vans stocked with mastic, metal-backed tape, and the most common filter sizes, so turnaround for Montebello customers is fast.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Montebello Homes
- Corroded seams on original galvanized steel. Homes built here in the 1940s through the 1960s used galvanized steel ducts that rust at the seams over decades. The joints open up, and conditioned air bleeds into the crawl space while smog and freeway residue from I-60 and I-710 get pulled in.
- Failed DIY foil tape. We see it constantly: a previous owner or handyman wrapped foil tape around a leaky joint, and within one season the adhesive baked off. It leaves a sticky residue and the gap is back, sometimes worse than before.
- Slab foundation bypass leaks. Many Montebello homes sit on slab foundations with duct runs buried in concrete. Those runs crack over time, and no amount of sealing above the slab addresses that hidden bypass. We’ll be honest about when a run needs to be rerouted instead of sealed.
- Undersized returns causing coil freeze-ups. Around Montebello Town Center, we regularly find return ducts that are simply too small for the AC system they serve. The negative pressure pulls unfiltered crawl space air into the system and causes evaporator coils to ice over in July.
Pricing for Duct Sealing in Montebello, CA
A standard duct sealing job in Montebello runs $450 to $1,200. The low end covers accessible supply and return sealing in a crawl space or attic with moderate leakage. The high end typically involves sealing plus replacing corroded sections of metal duct or adding a return drop where the original was undersized. Before we touch anything, you get a written price that covers the whole job. It doesn’t move at the door, and it doesn’t grow once we’re under the house. Roy Castellanos has built the business on that discipline since 2004. Call (626) 469-5477 for a free estimate.
We Also Serve Cities Near Montebello
Our crews cover the surrounding San Gabriel Valley and Gateway Cities, including Pico Rivera, Rosemead, Alhambra, and El Monte. If you’re just outside Montebello, give us a call and we’ll tell you straight whether your home falls in our regular service area. Most of these neighborhoods are a short drive, and we schedule based on your availability, not our convenience.
Serving Montebello, CA - Our Local Coverage Area
We’re based in the Montebello 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 Montebello
Smog, brake dust, and oily freeway residue from I-60 and I-710 settle inside your ductwork and turn into a film that traps every other particle that passes through. On a 1950s stucco home with original galvanized ducts, that film accelerates corrosion at the seams, which is where most leaks start. Sealing those seams correctly with mastic, not foil tape, stops the contaminated air from getting pulled into the system. Call (626) 469-5477 and we’ll give you a written price.
Often, yes. Frozen coils in that part of Montebello usually trace back to an undersized return duct creating negative pressure. The system can’t pull enough air, the coil runs too cold, and it ices over. Sealing the return and enlarging the drop where possible typically normalizes static pressure and stops the freeze. We recently sealed a 1950s home near Montebello Town Center where this exact fix ended a summer of coil freeze-ups.
It depends on how far the corrosion has gone. If the metal is structurally sound and the seams are the problem, sealing is the right call and runs $450 to $900 in most Montebello homes. If sections have rusted through or collapsed, sealing isn’t honest work because the duct is beyond repair. We’ll show you camera footage either way so the decision is based on what we both can see.
It reduces the dust that gets pulled into your duct system through the leaks, which is a significant portion of what ends up recirculating through your home during Santa Ana events. Fine particulate matter from the San Gabriel Valley blows constantly during those winds, and every open seam is an intake point. Sealed ducts mean that dust stays outside where it belongs. For an exact quote on your Montebello home, call (626) 469-5477.
If rooms at the end of the house never reach the temperature you set, or if your utility bills run higher than neighbors in similar homes, or if you see dust accumulating on furniture within days of cleaning, those are all signs of leakage. Homes near Montebello’s mature tree canopies also see more filter loading, but persistent dust that won’t quit almost always traces back to open duct joints. We’ll inspect yours and show you what we find.
Written by Roy Castellanos, Owner at Hollis Air Duct Pasadena, serving Montebello and the San Gabriel Valley.