Fast, Reliable Duct Repair & Sealing Across Tujunga
Duct repair and sealing in Tujunga typically costs $280–$650 for most residential jobs, with flex duct replacement running $180–$340 per section and full-system mastic sealing averaging $450–$850. We’re usually on-site within 45 minutes to an hour for Tujunga calls, whether you’re off Foothill Boulevard near the 210, up toward the Big Tujunga Canyon mouth, or tucked into the hillside streets above La Tuna Canyon Road. Richard Anderson personally leads every job — you’ll see the same face from estimate to completion, not a rotating subcontractor crew. If your registers show that telltale charcoal-gray film or your workshop ducts are pulling in canyon dust, call us at (833) 958-5022 for a free inspection.
Our Duct Repair & Sealing team knows Tujunga’s specific challenges: the post-2009 Station Fire burn scars on the San Gabriel ridgelines above town, the Santa Ana winds that funnel ash and char particulates straight down through the canyon, and the older wood-frame housing stock — bungalows and ranches from the 1930s through 1960s — with duct systems that were never designed to seal against this level of airborne contamination. We’ve spent 14 years solving exactly these problems.
Why Landmark Air Duct Cleaning Service California Is Tujunga’s Preferred Duct Repair & Sealing Company
Richard Anderson shows up — not a crew you’ve never met. That matters in Tujunga, where homeowners often live on larger parcels with detached workshops and extended duct runs that require real diagnostic skill, not a rushed template approach.
Our 4.9-star average across 364+ verified reviews reflects consistent, repeatable execution. Tujunga customers specifically mention appreciating that Richard walks the full system, including outbuildings most crews ignore. We’re not generalists who added ductwork as a sideline; 14 years focused on one trade means we recognize Tujunga’s contamination signature immediately — that gray-black ash film coating duct interiors — and we know which sealing methods actually stop it.
Response time to Tujunga averages under an hour from call to arrival. We carry Rotobrush and Nikro professional systems, plus mastic sealants and insulated flex duct stock sized for the heavier-duty applications common on Tujunga acreage properties. No waiting for parts, no return trips.
Our Duct Repair & Sealing Services in Tujunga
Duct Sealing with Mastic Sealant
Mastic sealant is our primary weapon against Tujunga’s ash infiltration problem. Standard foil tape dries and cracks in the canyon’s low-humidity climate; mastic remains flexible and creates a permanent, airtight bond at every joint, transition, and plenum connection. On a typical Tujunga ranch home, we’ll apply mastic to 15–25 connection points, sealing the path Santa Ana winds exploit to drive char particulates into your living space. A full mastic sealing job in Tujunga runs $450–$850 depending on system size and accessibility.
Flex Duct Repair
Tujunga’s older homes and detached workshops often rely on original or once-replaced flex duct that has collapsed, torn, or pulled loose at the collar. The vibration from oversized workshop doors and the thermal cycling of canyon temperature swings accelerate deterioration. We replace collapsed sections with new, properly sized insulated flex — R-6 or R-8 depending on the run — and secure with mechanical straps and mastic, not tape that’ll fail in six months. Flex duct repair in Tujunga typically costs $180–$340 per section.
Metal Duct Repair
Metal ductwork in Tujunga’s 1930s–1960s housing stock often suffers from separated seams, corroded spots from decades of moisture and ash interaction, and loose connections at the plenum. We re-seam with proper drive cleats, patch corroded areas with matching gauge metal, and — critically — apply mastic at every transition to prevent the ash bypass that standard filters can’t catch. Metal duct repair jobs in Tujunga range from $320–$580 for partial system work.
Duct Insulation
For Tujunga homes with duct runs in unconditioned attic spaces or extending to detached workshops, insulation adds a thermal barrier that also blocks ash infiltration through porous duct walls. We use foil-faced fiberglass wrap or pre-insulated flex replacement, depending on the existing configuration. Insulation upgrades in Tujunga typically run $280–$520 for targeted areas, $650–$1,100 for full-system coverage.
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 Tujunga
We work with Honeywell and Aprilaire components regularly — these are the systems we encounter most often in Tujunga’s established housing stock, and we carry common replacement parts and sealant materials to avoid delays. Our Rotobrush and Nikro equipment handles the cleaning and prep work before sealing, ensuring mastic adheres to clean metal and flex surfaces rather than bonding to ash residue. For homeowners in the 91042 and 91043 ZIP codes, this means same-day completion on most sealing jobs rather than stretched-out multi-day projects.
Common Duct Repair & Sealing Problems We See in Tujunga Homes
- Vibration-loosened joints in detached workshops. Tujunga’s acreage properties often have separate buildings with oversized doors that shake duct connections loose over time. We find gaps at plenum transitions that have been leaking unfiltered canyon air for years.
- DIY tape repairs baked dry by the canyon climate. Self-reliant homeowners in Tujunga often try sealing leaks with hardware-store foil tape. In this dry environment, the adhesive fails within one season, and the ash infiltration resumes worse than before because the tape residue prevents proper mastic adhesion until we clean it off.
- Santa Ana wind ash bypassing unsealed plenums. When winds funnel down Big Tujunga Canyon at 40+ mph, standard HVAC filters can’t capture the volume of fine particulate. Unsealed metal transitions and plenum connections become direct injection points for gray-black contamination.
- Collapsed flex duct in extended runs. The longer duct runs common to Tujunga’s larger properties create more friction and sag points. Original flex duct from the 1980s or 1990s has often collapsed entirely, blocking airflow to remote rooms or workshops while pulling return air through unconditioned, ash-laden spaces.
Pricing for Duct Repair & Sealing in Tujunga, CA
Here’s what duct repair and sealing costs in Tujunga’s market:
| Service | Typical Range in Tujunga |
|---|---|
| Mastic sealant application (full system) | $450 – $850 |
| Flex duct repair/replacement (per section) | $180 – $340 |
| Metal duct repair (partial system) | $320 – $580 |
| Duct insulation upgrade (targeted) | $280 – $520 |
| Duct insulation upgrade (full system) | $650 – $1,100 |
| Air leak repair (single location) | $150 – $280 |
Factors that push Tujunga jobs toward the higher end: extended duct runs to detached workshops, significant ash contamination requiring pre-cleaning before sealant application, and access challenges in hillside homes with cramped crawl spaces. We inspect first, quote upfront, and only proceed with your approval. Estimates are free — call (833) 958-5022 to schedule.
We Also Serve Cities Near Tujunga
Richard Anderson personally covers Sunland, La Crescenta-Montrose, Shadow Hills, and Burbank from our base in Bell. Each community has distinct duct challenges — Sunland shares some of Tujunga’s canyon exposure but with flatter terrain and different housing stock; La Crescenta-Montrose sees more moisture-related corrosion; Burbank’s denser development brings different access constraints. The local knowledge transfers, but the solutions are always specific to what we find on-site.
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
That film is post-fire ash and char particulate from the San Gabriel Mountain burn scars above Tujunga, driven into your system by Santa Ana winds funneling through Big Tujunga Canyon. Cleaning removes the buildup temporarily, but without sealing the leaks that let unfiltered air bypass your HVAC filter, the contamination returns within weeks. We identify and mastic-seal every bypass point. Call (833) 958-5022 for a leak inspection — estimates are free.
Yes — workshop duct systems in Tujunga typically have longer flex runs, more vibration exposure from oversized doors, and less frequent maintenance, making them prime leak points. We treat workshop systems as separate zones with their own sealing protocol. Richard Anderson will assess both during the same visit.
Most Tujunga ranch homes take 3–5 hours for complete mastic sealing and any necessary flex or metal repairs. Homes with detached workshops add 1–2 hours for the extended runs. We complete virtually all jobs in a single visit with our stocked equipment and materials.
We use professional-grade water-based mastic compounds rated for temperature cycling and low-humidity environments — the same materials specified by Abatement Technologies for restoration work in fire-impacted zones. Tape products, even “premium” foil versions, consistently fail in Tujunga’s climate within 6–18 months.
Insulation primarily addresses thermal efficiency, but foil-faced insulation products do provide a secondary barrier against fine particulate infiltration through porous duct walls. For Tujunga homes with workshop extensions or attic duct runs exposed to wind-driven ash, we often recommend insulation as part of a comprehensive sealing strategy. The investment typically pays back in both air quality improvement and reduced HVAC load.
Ready to stop the ash infiltration for good? Richard Anderson will personally inspect your Tujunga home’s duct system, identify every leak point, and seal it with methods proven in 14 years of canyon-country work. No subcontractor handoffs. No template solutions. Call (833) 958-5022 for your free estimate — we’re usually on-site within the hour.
Written by Richard Anderson, Owner at Landmark Air Duct Cleaning Service California, serving Tujunga and surrounding communities since 2010.