Fast, Reliable Duct Repair & Sealing Across Van Nuys
Duct repair and sealing in Van Nuys typically runs $280–$650 for most residential jobs, with same-day service available when you call before noon. We repair and seal sheet-metal, flex, and insulated duct systems throughout the 91408, 91409, 91410, and 91411 ZIP codes, plus the surrounding acreage properties near the Sepulveda Basin. If your vents are blowing weak, your energy bill’s climbing, or you’re smelling dust every time the AC kicks on, compromised ductwork is the likely culprit. Call (866) 359-7544 and we’ll get Matthew Gonzalez or our Duct Repair & Sealing crew out to diagnose it.
Why Elite Air Duct Cleaning Service Los Angeles Is Van Nuys’s Preferred Duct Repair & Sealing Company
We’ve been driving to Van Nuys jobs for 11 years now — long enough to know which ranch homes on Kittridge Street still have the original 1950s sheet-metal trunks, and which properties along Woodley Avenue need heavy-duty solutions for detached workshops. Matthew Gonzalez is on every job as lead technician, not sitting in an office dispatching subcontractors. Our 387 customers reviewed us — read what they found — and that 4.9-star average comes from showing up with the right materials, measuring twice, and sealing joints that stay sealed.
Van Nuys sits in a tough spot geographically. The San Fernando Valley’s mountain-rimmed basin traps particulates at ground level, and Van Nuys Airport’s sustained flight traffic adds aviation exhaust to the mix. Your ducts work harder here than in coastal LA. We factor that into every repair — thicker mastic, reinforced connections, and metal transitions where flex would fail. Response time to Van Nuys is typically 45–90 minutes from dispatch, and we stock Rotobrush and Nikro equipment on every truck so we’re not making second trips for parts.
Our Duct Repair & Sealing Services in Van Nuys
Duct Sealing with Mastic Sealant
Standard HVAC tape degrades fast in Van Nuys’s heat. We use professional-grade mastic sealant — the same compound we apply with Rotobrush systems — brushed into every joint and seam. In the older ranch homes near Van Nuys Boulevard, we’ve found original metal ducts where the original sealant turned to powder decades ago. We strip it clean and reseal with fresh mastic rated for 200°F, which matters when your attic hits 140°F in August and the system’s cycling 16 hours a day.
Flex Duct Repair
Flex duct is common in Van Nuys additions and retrofits from the 1980s and 90s, but it’s also the first to fail. Sagging sections collect moisture. Rodents in the Sepulveda Basin greenbelt chew through the liner. We replace collapsed or punctured flex with new insulated duct, support it properly to prevent future sags, and seal the transitions with mastic — never just tape. On a ranch property along Woodley Avenue, just south of Van Nuys Airport, we replaced a collapsed 20-foot section of flex duct in a detached workshop where the homeowner’s welder had punctured the liner. We used Rotobrush’s mastic sealant on the new metal transition and reinforced the connection with HVAC tape, ensuring the 5-ton unit serving the shop wouldn’t lose airflow through the long run.
Metal Duct Repair
The post-WWII housing stock in Van Nuys — stucco ranches built from the late 1940s through the 1960s — mostly has galvanized sheet-metal trunk lines. After 50–70 years, they’re rusting at the seams, and the 1994 Northridge earthquake cracked joints that were never properly repaired. We cut out damaged sections, fabricate custom transitions, and weld or seal connections that handle modern static pressure. Heavy-duty repairs for acreage properties near the Sepulveda Basin often require thicker-gauge metal or reinforced flex, because standard residential materials can’t handle the longer runs and higher static pressure from larger HVAC units serving detached workshops.
Duct Insulation Replacement
Insulation on Van Nuys ducts crumbles two ways: heat degradation in attics, and moisture absorption in sagging flex runs. Once the insulation’s compromised, you’re losing conditioned air and gaining attic dust. We pull old fiberglass or foil-backed insulation, repair the duct underneath, then wrap with fresh R-6 or R-8 insulation sealed at every seam. For workshop and outbuilding ducts on larger lots, we use higher-density insulation that won’t compress over long unsupported spans.
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 Van Nuys
Our trucks carry Rotobrush and Nikro equipment for mechanical cleaning and sealant application, plus Honeywell air quality components when your repair reveals filtration gaps. We don’t send a guy with a shop-vac and a roll of tape. The tools we use are the same class Abatement Technologies deploys on commercial jobs — because your 5-ton workshop unit in Van Nuys works as hard as many small commercial systems. We stock mastic, metal transitions, and flex duct in common diameters so most Van Nuys repairs finish in one visit.
Common Duct Repair & Sealing Problems We See in Van Nuys Homes
- Aviation-exhaust particulate loading near Van Nuys Airport. Homes in the 91406 corridor along Woodley and Sepulveda sit under sustained low-altitude flight traffic. Homeowners run AC with windows closed year-round to block noise, so the duct system becomes the sole ventilation pathway — and it’s recirculating aviation-adjacent particulates through compromised joints.
- Earthquake-damaged joints from 1994, never properly repaired. The Northridge quake cracked ductwork throughout Van Nuys’s ranch-home neighborhoods. Many homeowners patched the drywall, not the ducts. We still find separated trunk lines and dislodged liner insulation in homes on Saticoy Street and Kittridge Avenue.
- DIY patching with non-HVAC materials. Self-reliant Van Nuys owners often attempt repairs with duct tape or caulk. These fail under high static pressure, leaving joints unsealed and wasting 20–30% of conditioned air. We remove the amateur work and apply proper mastic.
- Sagging flex ducts on long acreage runs. Properties near the Sepulveda Basin with detached workshops run flex 30, 40, 50 feet unsupported. The sag collects moisture, degrades insulation, and breeds microbial growth that a visual inspection from the register won’t catch.
Pricing for Duct Repair & Sealing in Van Nuys, CA
Here’s what duct repair and sealing costs in the Van Nuys market right now:
- Mastic sealant touch-up (localized leaks, 1–3 joints): $180–$280
- Flex duct section replacement (standard residential run): $280–$450
- Metal duct repair with custom fabrication: $350–$650
- Heavy-duty metal/reinforced flex for workshop or acreage property: $450–$850
- Duct insulation replacement (per section): $220–$380
Van Nuys pricing runs slightly above coastal LA because of the heat load — we’re often working in 130°F attics, and that demands proper scheduling and hydration breaks. Older ranch homes with original metal ductwork may need additional access cuts, which adds labor. We quote upfront after inspection, not after we’re halfway through the job. Call (866) 359-7544 for a free estimate — we’ll measure your system and give you a number that doesn’t change.
We Also Serve Cities Near Van Nuys
Our service radius covers Valley Glen to the east, Sherman Oaks and Encino to the south, and North Hollywood to the southeast — all sharing the same San Fernando Valley heat-basin conditions and much of the same post-war housing stock. If you’re in a border neighborhood and unsure, call and we’ll confirm.
Serving Van Nuys, CA — Our Local Coverage Area
We’re based in the Van Nuys 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 Van Nuys
Yes, homes within a mile of Van Nuys Airport typically accumulate aviation exhaust particulates at higher rates than inland Valley properties, and closed-window living patterns force all ventilation through the duct system. We inspect joints and seals more carefully in these areas and often recommend tighter mastic applications. Call (866) 359-7544 to schedule an inspection if you’re near the Woodley/Sepulveda corridor.
Heavy-duty repairs for 5-ton units and larger typically run $450–$850 in Van Nuys, compared to $280–$450 for standard residential flex replacement, because they require thicker-gauge metal transitions, reinforced flex, or custom fabrication for longer runs. The materials and labor scale with static pressure demands. We stock the larger-diameter transitions and reinforced components for same-day completion on most Van Nuys acreage properties.
Yes, we regularly repair earthquake-compromised metal ducts in Van Nuys’s 1940s–1960s ranch homes, including separated trunk lines and dislodged insulation that was never properly addressed after the Northridge quake. We cut out damaged sections, fabricate custom metal transitions, and seal with mastic rated for modern static pressure. Many of these repairs reveal hidden airflow losses of 25% or more.
Brush-applied mastic sealant is the only reliable choice for flex-to-metal connections in high-static-pressure applications like large garages and workshops — HVAC tape alone fails within one to two seasons under the pressure and temperature cycling. We apply mastic with a brush or gloved hand, embed fiberglass mesh at stress points, and let it cure before pressurizing the system.
We use metal transitions with mastic sealant and mechanical fasteners — not tape — because welding and generator equipment create vibration that loosens adhesive bonds over time. We also inspect for puncture damage from equipment movement and recommend protective baffles or rerouting if the duct run passes through active work areas. Call (866) 359-7544 and we’ll assess your workshop layout.
Written by Matthew Gonzalez, Owner and Lead Technician at Elite Air Duct Cleaning Service Los Angeles, serving Van Nuys and the San Fernando Valley since 2014.