Fast, Reliable Duct Repair & Sealing Across Irvine
Duct repair and sealing in Irvine typically costs between $280 and $650 for most residential jobs, with same-day service available throughout the city when you call before noon. Our Duct Repair & Sealing team has been driving to Irvine from our Los Angeles headquarters for over 42 years, and we know the difference between a Woodbridge attic built in 1984 and a Portola Springs home finished last year. The drive takes us up the 405 and across the 133, usually putting a uniformed technician at your door within two to three hours of your call. Dial (855) 401-6006 and you’ll reach a live person, not a menu.
Why Bellows Air Duct & Vent Co. of California Is Irvine’s Preferred Duct Repair & Sealing Company
We’ve worked in Irvine long enough to remember when the Great Park was still MCAS El Toro. Roger Castañeda built this company in 1984 on the idea that a tradesman should say what he’ll do, do it, and stand behind it without making the homeowner fill out forms. That still holds.
Irvine customers call us back because the price we quote on the phone matches the invoice. No bait coupons, no upsell at the door. Every job gets camera-inspected before and after, so you see what we see in your ducts, not just take our word. Our 90-Day Done Right Promise is stamped on every invoice: if it’s not right, we return at no charge, no paperwork, no arguing.
Calls are answered by a live person 24 hours a day. Our technicians are background-checked and uniformed, and most repairs are completed in a single visit. We’ve earned a strong local reputation in Orange County by showing up when we say we will and fixing the problem without drama.
Our Duct Repair & Sealing Services in Irvine
Duct Sealing
Irvine’s master-planned homes in villages like Woodbridge and Portola Springs often have builder-grade flex duct and mastic joints that fail within 5-7 years due to temperature cycling and poor initial installation. We use professional-grade mastic sealant compatible with Rotobrush systems to close gaps at trunk lines, boots, and register connections. A typical duct sealing job in Irvine runs $280-$450 for a single system, depending on accessibility and the extent of original seal failure. Targeted sealing restores Title 24 efficiency without replacing intact ductwork.
Flex Duct Repair
Flex duct is common in Irvine’s 1980s and 1990s construction, especially in Westpark and Northwood. The fiberglass liner deteriorates, the mylar sleeve tears at bends, and the wire helix collapses in hot attics. We replace damaged sections with new insulated flex duct, secure it with proper supports to prevent sagging, and seal all connections. Flex duct repair in Irvine typically costs $180-$340 per run. We sealed a leaking flex duct run in a 2006-built home in Westpark (92612) where the original foil-backed duct tape had peeled, causing a 20% loss of conditioned air to the second bedroom. We replaced the tape with Rotobrush-compatible mastic sealant and re-insulated the exposed trunk at the attic boot.
Metal Duct Repair
Older Irvine homes and some commercial conversions in the business district still have galvanized steel ductwork. Seams separate, rust forms at condensate points, and vibration loosens connections. We patch, re-seam, or replace sections as needed, then seal with mastic and fiberglass mesh for a permanent repair. Metal duct repair in Irvine runs $320-$580 depending on accessibility and whether sections need replacement rather than sealing.
Duct Insulation
Insulation R-value degrades faster in attics of older Woodbridge homes because original 30-year-old fiberglass lining has delaminated, reducing system efficiency. We install new duct insulation with proper vapor barriers, sized to California Title 24 standards. Duct insulation in Irvine typically costs $400-$750 for a complete system. Proper insulation prevents condensation in humid shoulder seasons and keeps conditioned air at temperature from the air handler to your registers.
Mastic Sealant Application
We apply mastic sealant, not duct tape, at every joint and seam. Mastic remains flexible for decades, while foil-backed tape fails in 3-5 years in Irvine’s attic conditions. Our technicians use Abatement Technologies-compatible mastic rated for residential HVAC systems. This is standard on every sealing job we perform in Irvine.
Air Leak Repair
Leaks at the air handler plenum, filter rack, and return-air pathways are common in Irvine’s attached condos and townhomes, where shared duct chases complicate isolation. We pressure-test to locate leaks, then seal with appropriate materials. Air leak repair in Irvine typically runs $250-$480.
What happens when you call
- 1
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 Irvine
We carry parts and materials from Rotobrush, Abatement Technologies, and Aprilaire on every truck serving Irvine. These are the same brands serious HVAC contractors specify, not hardware-store substitutes. Because we stock locally, most repairs don’t wait for parts orders. Our technicians are trained on the specific application of these systems in California’s Title 24 environment, where duct tightness is measured and verified. If your Irvine home has a Honeywell or Aprilaire air cleaner integrated with the duct system, we’ll inspect and protect that connection during any sealing work.
Common Duct Repair & Sealing Problems We See in Irvine Homes
- Builder-grade mastic dries and cracks in Irvine’s mild but cycling temperatures, causing gradual air loss that raises utility bills. Homeowners in Portola Springs and Stonegate notice this first as uneven heating between rooms.
- Santa Ana winds force fine dust into gaps at duct-to-register connections, especially in Great Park homes (92618) under ongoing construction, accelerating seal failure. The silica-heavy soil dust from active grading sites is particularly abrasive to exposed duct liners.
- Duct insulation R-value degrades faster in attics of older Woodbridge (92604) homes because original 30-year-old fiberglass lining has delaminated, reducing system efficiency. These homes often have the original 1980s ductwork still in service.
- Tightly sealed new construction traps contaminants. Irvine’s newer homes are built to California Title 24 standards with minimal natural air exchange. Once Santa Ana dust, wildfire smoke, or construction particulates enter the duct system, they recirculate until physically removed or sealed out at the source.
Pricing for Duct Repair & Sealing in Irvine, CA
We’re upfront about numbers because we don’t bait-switch. Here’s what duct repair and sealing costs in Irvine’s market:
| Service | Typical Range in Irvine |
|---|---|
| Duct sealing (single system) | $280 - $450 |
| Flex duct repair (per run) | $180 - $340 |
| Metal duct repair | $320 - $580 |
| Duct insulation (full system) | $400 - $750 |
| Air leak repair | $250 - $480 |
| Mastic sealant touch-up | $150 - $280 |
What moves you within these ranges: attic accessibility (tight trusses take longer), extent of original damage, whether we need to remove degraded insulation before sealing, and whether your system requires pressure-testing to Title 24 standards. We present your exact price before lifting a tool. Estimates are free. We also honor $50 off any repair over $250, and a permanent 5% senior and veteran discount. Call (855) 401-6006 for your specific quote.
We Also Serve Cities Near Irvine
Our technicians regularly work in Irvine and the surrounding communities: Tustin to the north, Aliso Viejo and Laguna Hills to the south, Santa Ana to the west, and North Tustin in the foothills. Same scheduling, same pricing structure, same live-answer phone line. If you’re near the Irvine border, we’ll confirm coverage when you call.
Serving Irvine, CA - Our Local Coverage Area
We’re based in the Irvine 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 - Duct Repair & Sealing in Irvine
Builder-grade mastic and tape in Portola Springs homes often fail within 5-7 years due to temperature cycling in attics and substandard initial application. The rapid development pace in 92618 means some crews cut sealing corners to meet construction deadlines. We remove failed materials and apply proper mastic rated for long-term flex. Call (855) 401-6006 for a free inspection - we’ll show you the camera footage.
Yes, sealing return-air leaks and gaps at the air handler can significantly reduce wildfire smoke infiltration, though it’s one part of a complete defense. Irvine’s position at the foot of the Santa Ana Mountains means homes here face recurring wildfire smoke from the Limestone Canyon and Irvine Ranch corridor; the 2020 Silverado Fire pushed combustion particulates deep into tightly sealed homes where they lingered long after the air quality index recovered. We seal the envelope of your duct system so your filtration, not outdoor pressure, controls what enters. For a full assessment of your home’s smoke vulnerability, call (855) 401-6006.
Yes. Technicians working the 92618 ZIP routinely find unusually heavy construction dust accumulation in ducts of homes just a few years old, because large-scale grading and framing for adjacent new phases of the Great Park development carries silica-heavy soil dust directly into HVAC systems of already-occupied homes. Sealing leaks at the return side and register connections prevents this dust from bypassing your filter and recirculating. We pressure-test to find the entry points. Call (855) 401-6006 for an estimate - estimates are free.
Sealing closes gaps where air leaks out; insulation slows heat transfer through duct walls. Your 30-45-year-old Woodbridge home likely needs both: original fiberglass liner has delaminated, reducing R-value, while decades of thermal cycling have cracked original seals. We typically seal first, then insulate, because insulating over leaks traps moisture and wastes material. A combined sealing and insulation job in Woodbridge runs $550-$950. Call (855) 401-6006 to schedule camera inspection and exact pricing.
The winds themselves don’t damage seals directly, but they force fine chaparral dust, desert particulates, and pollen through every gap in your duct system at pressure, accelerating wear on tape and mastic and carrying abrasive material into duct liners. October through March, this reversed onshore flow hits Irvine harder than coastal Orange County cities. Homes in the 92618 and 92620 ZIPs, closer to the mountain gap, see the most aggressive dust loading. Proper mastic sealing and maintained filtration are your best defense. Call (855) 401-6006 before the next wind event - we’ll check your system’s integrity.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Irvine since 1984.