Fast, Reliable Duct Repair & Sealing Across Tujunga
Duct repair and sealing in Tujunga typically costs $280-$650 for most residential jobs, with same-day service available throughout 91042 and 91043. We’re Bellows Air Duct & Vent Co. of California, and our Duct Repair & Sealing crew has been driving up La Tuna Canyon Road and along Foothill Boulevard for over four decades. We know the one-trip mindset that Tujunga homeowners expect - you don’t want a return visit, and neither do we. Call (855) 401-6006 for upfront pricing and a crew that shows up when we say we will.
Why Bellows Air Duct & Vent Co. of California Is Tujunga’s Preferred Duct Repair & Sealing Company
We’ve worked on duct systems in Tujunga since 1984, long before the big box stores opened on Foothill and back when most of these homes still had their original galvanized ductwork. Our reputation here was built one repair at a time - no coupons, no bait pricing, just the number we quote on the phone matching the number on the invoice.
Our technicians are background-checked, uniformed, and carry the equipment to handle metal duct repair, flex duct replacement, and mastic sealing in a single visit. That’s not a marketing line - it’s how we avoid wasting your Saturday. Calls are answered by a live person 24 hours a day, not a voicemail tree, and most Tujunga appointments are scheduled within 24 hours.
What separates us from crews that drive up from the valley floor is our familiarity with Tujunga’s specific conditions. We know which hillside lots have the settling problems. We know which neighborhoods got the heaviest ash load from the 2009 Station Fire. And we know that a detached workshop off Big Tujunga Canyon Road needs a different approach than a slab ranch near Mount Gleason Avenue.
Our Duct Repair & Sealing Services in Tujunga
Duct Sealing with Mastic Sealant
Tujunga’s original 1940s-1960s sheet-metal duct systems weren’t built for the pressure loads modern HVAC units produce. Joints loosen. Seams crack. Standard foil tape degrades in three to five years and leaves you leaking conditioned air into your attic or crawl space. We use professional-grade mastic sealant - the same approach serious HVAC contractors specify - brushed onto every joint and seam, then cured to a permanent flexible seal. In Tujunga homes with post-fire Phos-Chek residue inside the ducts, we perform a specialized detergent flush first. Mastic won’t adhere to retardant-coated surfaces, and crews that skip this step are sealing over contamination that will peel within months.
Flex Duct Repair and Replacement
Many Tujunga homes have flex duct that was added decades after the original metal system - often run through unconditioned attics or hillside chases where temperature swings and rodent activity take their toll. We replace collapsed, torn, or water-damaged flex duct with insulated, R-8 rated product that meets current California Title 24 standards. Our crew carries multiple diameters on the truck, so we’re not making a second trip to a supplier while your system sits open.
Metal Duct Repair
Galvanized steel duct runs in older Tujunga homes corrode at the seams, separate at collars, and collapse where hillside settling has shifted the framing. We repair or replace damaged sections with 26- or 30-gauge sheet metal, match the original geometry, and seal with mastic - not tape alone. For detached workshops and outbuildings common on Tujunga’s larger hillside lots, we extend metal trunk lines or transition to properly supported flex where vibration isolation matters.
Duct Insulation
Uninsulated or degraded duct insulation in Tujunga’s attic and crawl spaces wastes energy and creates condensation problems during Santa Ana wind events when humidity drops and temperature differentials spike. We wrap repaired or replaced duct with formaldehyde-free fiberglass insulation or install pre-insulated flex where appropriate. This is particularly important for supply lines running through the debris-filled chases we commonly find in raised-foundation ranch homes near the Angeles National Forest boundary.
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 Tujunga
Our trucks stock parts and materials from Rotobrush, Nikro, and Abatement Technologies - the same brands specified by commercial HVAC contractors who can’t afford callbacks. For Tujunga customers, this means we’re not ordering parts from a warehouse in Van Nuys and making you wait. We carry mastic compounds, sheet-metal fittings, insulated flex duct, and specialized post-fire flushing detergents on every vehicle. Most repairs are completed in a single visit because we’ve already invested in the inventory.
Common Duct Repair & Sealing Problems We See in Tujunga Homes
- Disconnected duct joints from hillside settling. Tujunga’s hillside lots shift seasonally, especially in the Stonehurst neighborhood and along canyon-adjacent streets. Raised-foundation ranch homes see metal duct collars pull apart and flex duct sag or separate at connections. Standard tape repairs fail within a year because they don’t address the structural movement.
- Santa Ana wind debris loading. Winds channel through Big Tujunga Canyon with amplified force, carrying decomposed granite and dried brush particles past return-air filters and into supply lines. This debris must be extracted with heavy-duty vacuum equipment before any sealant application - otherwise you’re sealing contamination into the system.
- Post-fire Phos-Chek residue preventing sealant adhesion. After major fire events, homes in 91042 accumulate pink or orange retardant residue on interior duct surfaces. Mastic sealant will not cure properly over this coating. We flush with a specialized detergent first - a step standard cleaning protocols in flatland communities like Burbank would never include.
- Poorly sealed additions and retrofits. Decades of homeowner and contractor modifications have left many Tujunga homes with mismatched duct materials - original metal trunks connected to uninsulated flex with inadequate support. These hybrid systems leak at every transition point and often violate current code for duct sealing in conditioned versus unconditioned spaces.
Pricing for Duct Repair & Sealing in Tujunga, CA
We’re straightforward about numbers because we’ve seen what bait pricing does to homeowners who’ve already been burned once.
| Service | Typical Range in Tujunga |
|---|---|
| Single joint/seam mastic sealing | $280-$380 |
| Flex duct section replacement (per run) | $340-$520 |
| Metal duct section repair or replacement | $420-$650 |
| Post-fire duct flushing + resealing | $580-$890 |
| Whole-system duct sealing (mastic, typical 3-4 bedroom) | $1,200-$1,850 |
Factors that move Tujunga jobs toward the higher end: post-fire residue requiring specialized flushing, multiple disconnected joints in hillside-settled homes, and access difficulty in attics or crawl spaces with limited clearance. We disclose the full price before lifting a single tool - the number on the phone is the number on the invoice. Our $50 Off Any Repair Over $250 applies to duct sealing and repair work, and we offer a free second opinion on any written estimate you’ve already received.
Call (855) 401-6006 for an exact quote - estimates are free, and most Tujunga appointments are available within 24 hours.
We Also Serve Cities Near Tujunga
Our service area extends to Tujunga and the surrounding foothill communities - Sunland to the west, La Crescenta-Montrose to the east, Shadow Hills to the south, and Burbank below the Verdugo Mountains. Each has its own ductwork challenges, from Burbank’s flatland slab construction to La Crescenta-Montrose’s similar hillside settling patterns. We carry the local knowledge to match.
Serving Tujunga, CA - Our Local Coverage Area
We’re based in the Tujunga 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 Tujunga
Yes - ash and Phos-Chek retardant infiltrate duct systems through return-air pathways, gaps around registers, and even closed vents via pressure differentials during extreme fire events. The 2009 Station Fire deposited contamination throughout 91042 regardless of whether systems were running. We inspect with a camera first to confirm residue presence, then flush with specialized detergent before any sealing work. Call (855) 401-6006 to schedule a camera inspection - estimates are free.
Hillside lot settling in the Stonehurst neighborhood off Foothill Boulevard shifts framing and duct supports seasonally, causing metal collars to pull apart and flex connections to sag. Standard tape repairs fail because they don’t accommodate this movement. We use mastic sealant with mechanical reinforcement and, where needed, install flexible transition sections that absorb settling without breaking the airtight seal. We recently sealed a detached workshop in Stonehurst where original 1940s sheet-metal runs had pulled apart - our crew used mastic and insulated flex duct to restore integrity in one trip.
Yes - this is one of the most common configurations we find in Tujunga’s post-war ranch homes. The original galvanized trunk lines are often sound, but the flex duct added in the 1970s or 1980s has collapsed, torn, or lost its insulation. We replace degraded flex sections with current-code R-8 insulated product, properly support it to prevent sagging, and seal all transitions with mastic. The metal trunk stays if it’s structurally sound - no need to replace what isn’t broken.
Santa Ana winds channel through Big Tujunga Canyon with unusual force, depositing heavy dust and mountain-derived particulate loads that accelerate duct contamination and can clog supply lines. This debris must be extracted before sealant application - we use Nikro and Rotobrush vacuum equipment for this step. The winds also create pressure differentials that test seal integrity immediately, which is why we verify every repair with a post-work camera inspection rather than just claiming it’s tight.
Uneven heating or cooling between rooms, dust blowing from registers even when the system is off, and unexpectedly high energy bills are the three most common indicators. In Tujunga’s raised-foundation ranch homes, we often find debris-filled chases where original duct runs have separated from the plenum or where later flex additions have pulled loose. A camera inspection confirms the location and extent of disconnection without tearing into walls or ceilings. Call (855) 401-6006 to schedule - we’ll show you exactly what we’re seeing before we quote any repair.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Tujunga since 1984.