Duct Repair & Sealing in North Hollywood, CA
If your home in North Hollywood is losing cooled air to the attic, running up energy bills you can’t explain, or circulating dust no matter how often you clean — the problem is almost certainly inside your ductwork. Our Duct Repair & Sealing team knows North Hollywood’s housing stock, its punishing Valley heat, and the duct failures that show up here more than anywhere else in the LA basin. Call us at (844) 734-2955 and we’ll get a real technician — not a sales rep — out to your home fast.
Why Pure Air Duct Cleaners Is North Hollywood’s Preferred Duct Repair & Sealing Company
We’ve been working attics and crawlspaces across North Hollywood for five years, and what sets us apart isn’t a catchy slogan — it’s that Larry Torres, our owner, is also the lead technician who shows up at your door. You’re not getting a rotating crew of subcontractors or a franchise tech reading from a checklist. Larry runs the Rotobrush and Nikro systems personally, diagnoses what he finds in your attic, and explains it to you straight before any work begins.
That approach shows in the numbers. We’ve earned a 4.9-star rating across 288 verified customer reviews — a consistency you simply don’t sustain by accident over hundreds of jobs. North Hollywood homeowners from the Lankershim corridor down through the NoHo Arts District have called us back for second visits and sent their neighbors our way. When the person answering the phone is the same person climbing into your attic, accountability is built into the job.
Our Duct Repair & Sealing Services in North Hollywood
Duct Sealing
Sealing leaky ducts is the single highest-impact repair we perform in North Hollywood homes, and for good reason: the San Fernando Valley’s bowl geography traps particulates from the nearby 170 and 101 freeway corridors, and any unsealed gap in your return plenum is pulling that air directly into your breathing space. We apply professional-grade mastic sealant — not the foil tape that drys out and peels in Valley attic heat — at every collar, joint, and plenum seam we can access. A typical mastic duct sealing job in North Hollywood runs $300–$600 depending on system size and access.
Flex Duct Repair
Flex duct is everywhere in North Hollywood’s postwar tract homes, and it fails in two very specific ways here: it collapses under the sustained heat of Valley attics that routinely exceed 150°F, and it gets knocked loose at its collar connections. We see this constantly in 91605 and 91606 ZIP codes — flex duct that was reattached after the 1994 Northridge earthquake with nothing but duct tape, tape that dried out years ago and is now drawing 130°F attic air straight into the supply stream while the homeowner’s AC runs nonstop. Flex duct repair in North Hollywood typically runs $150–$400 per section, and we replace rather than re-tape whenever the liner has degraded past the point of a reliable seal.
Metal Duct Repair
Older stucco apartment buildings and 1960s ranch homes throughout North Hollywood — particularly in the stretch between Magnolia Boulevard and Oxnard Street — were built with sheet metal trunk lines that have now spent 50-plus years expanding and contracting through Valley temperature swings. Seams separate, screws back out, and sections drop. We re-join, screw, and seal metal duct sections with mastic and mesh tape rated for high-temperature attic environments, not hardware-store foil tape. Metal duct repair jobs in North Hollywood generally run $200–$700 depending on how many sections need attention and the accessibility of the trunk line.
Duct Insulation
Uninsulated or degraded duct insulation in a North Hollywood attic isn’t just an efficiency problem — it’s a physics problem. When supply air at 55°F travels through an uninsulated duct surrounded by 150°F attic air, you’re losing a significant portion of your cooling before it reaches the register. We wrap or replace duct insulation using materials rated for the extreme temperature differential common in San Fernando Valley attics, and we pair this service with sealing so you’re not solving one half of the problem. Insulation replacement in North Hollywood runs $400–$900 for a typical single-family home.
Trusted Brands We Service in North Hollywood
We work with Honeywell and Aprilaire components on damper and air handler connections, use Abatement Technologies protocols when mold or contaminant concerns are present — which comes up more than you’d expect in older North Hollywood apartment buildings with long-sealed attic spaces — and apply Guardsman products for sanitizing after repair work. Having these brands in our kit means North Hollywood customers don’t need to schedule a second contractor for follow-up air quality work. We carry commonly needed parts for North Hollywood home sizes so jobs move forward on the first visit, not a return trip.
Common Duct Repair & Sealing Problems We See in North Hollywood Homes
- Post-Northridge duct tape repairs that have fully failed: Thousands of North Hollywood homes had ductwork dislodged or crimped in the January 1994 earthquake and were reattached with standard duct tape rather than proper mastic and clamps. That tape has been baking in Valley attic heat for over 30 years and is now drawing unconditioned air — sometimes at 130°F or higher — directly into supply runs, which explains the inexplicable spikes in summer energy bills residents in 91601 and 91606 describe.
- Collapsed and kinked flex duct in high-heat attics: North Hollywood attic temperatures regularly exceed 150°F during summer, well past the rated service temperature of lower-grade flex duct installed in postwar construction. The inner liner develops cracks and collapses, reducing airflow to certain rooms dramatically while the system continues to run at full load.
- Smog and dust infiltration through leaking return plenums: The San Fernando Valley’s bowl geography concentrates particulate matter from the adjacent freeway corridors, and a poorly sealed return plenum pulls that debris-laden air into the system constantly. North Hollywood homes near the 170 interchange in particular see accelerated debris accumulation inside duct systems.
- Deteriorated insulation on attic trunk lines in apartment buildings: The 1950s–1970s stucco apartment complexes common throughout North Hollywood were built during a period when duct insulation standards were minimal. Decades of Santa Ana wind events driving fine desert dust through micro-gaps, combined with UV degradation at any exposed duct penetration point, have left many of these systems with bare or crumbling insulation and joints that leak on every Santa Ana event.
Pricing for Duct Repair & Sealing in North Hollywood, CA
We don’t give you a vague “it depends” answer and then surprise you with the number. Here’s what North Hollywood jobs actually look like: mastic duct sealing runs $300–$600 for a standard single-family home; flex duct section replacement is $150–$400 per run; metal duct repair comes in at $200–$700 depending on trunk line access; and full duct insulation replacement for a typical North Hollywood attic runs $400–$900. Larger apartment buildings in the 91605 and 91606 ZIP codes typically fall toward the higher end of each range due to system complexity. What affects cost most is access — a sealed attic hatch and a low-pitch roof add time to any job. Call (844) 734-2955 for a free, no-pressure estimate.
We Also Serve Cities Near North Hollywood
Our work in North Hollywood is part of a broader service area that includes West Hollywood, Hollywood, Universal City, Beverly Hills, Studio City, Century City, Koreatown, and Silver Lake. If you’re a property manager or homeowner straddling the line between North Hollywood and any of these neighborhoods, one call covers you — we don’t charge a separate trip fee for border ZIP codes.
Serving North Hollywood, CA — Our Local Coverage Area
We’re based in the North Hollywood 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 North Hollywood
We can typically reach North Hollywood within one to two business days for standard repair and sealing appointments, and we prioritize same-week scheduling for situations involving active air quality concerns or a system that’s clearly drawing attic air into the living space. Because Larry works the jobs himself rather than dispatching subcontractors, scheduling is direct — you call, you know exactly who’s coming.
Yes — we serve all active North Hollywood ZIP codes including 91601, 91602, 91603, 91605, 91606, 91609, 91611, and 91612. Whether your home is near the NoHo Arts District on Lankershim, further west toward Coldwater Canyon Avenue, or in the apartment-dense blocks around Victory Boulevard, we come to you with a fully stocked van.
For situations where a disconnected duct is pushing hot attic air directly into the home — a real risk in North Hollywood during July and August heat events — we do our best to accommodate urgent calls, often within 24 hours. Call (844) 734-2955 directly and describe what you’re experiencing; Larry will give you an honest timeline on the spot.
Pricing in North Hollywood is consistent with the rest of our San Fernando Valley and central LA service area — we don’t adjust rates by neighborhood. The factors that affect cost are the same anywhere: duct type (flex vs. metal), number of problem areas, and attic accessibility. North Hollywood homes do tend to have more flex duct failures than coastal neighborhoods due to the heat differential, which can mean slightly more material cost, but the labor rate is flat.
We stand behind our sealing and repair work — if a mastic seal or repaired section fails within the normal service window due to workmanship, we return and fix it at no charge. Because Larry is the one doing the work, there’s no finger-pointing between a company and a subcontractor if a question comes up after the visit. We’ll give you specific warranty terms in writing when we provide your estimate.
Written by the team at Pure Air Duct Cleaners, serving North Hollywood since 2019.