Duct Repair & Sealing in North Hollywood, CA
North Hollywood homeowners deal with some of the harshest conditions for ductwork anywhere in Los Angeles County — scorching Valley summers, aging post-war housing stock, and air quality that puts unusual strain on every HVAC system in the area. When ducts leak, collapse, or lose their insulation, that strain compounds fast. Our Duct Repair & Sealing team reaches North Hollywood quickly, diagnoses the real source of the problem, and fixes it with professional-grade equipment — not a temporary patch. Call us at (424) 380-6917 for a free estimate.
Why Pure Air Duct Cleaners West Hollywood Is North Hollywood’s Preferred Duct Repair & Sealing Company
We’ve spent nine years building a reputation across the San Fernando Valley, and North Hollywood is one of the neighborhoods where we work most consistently. Paul Johnson — owner and lead technician — personally handles jobs here, which means the most experienced person in the company is the one crawling your attic or carport ceiling, not a first-week subcontractor. That’s a distinction that matters when you’re dealing with duct systems that are sometimes 60 or 70 years old.
The results speak for themselves: 613 verified customer reviews averaging 4.9 out of 5 stars reflect a standard we hold ourselves to on every job, whether it’s a dingbat apartment off Lankershim Boulevard or a ranch-style home near the North Hollywood Recreation Center. We use Rotobrush rotary brush systems and Nikro negative-air machines — the same equipment used in commercial and industrial settings — because aging Valley ductwork demands tools that can actually handle what they find.
Our Duct Repair & Sealing Services in North Hollywood
Duct Sealing
Leaky ducts are one of the most common energy drains we find in North Hollywood homes. When summer temperatures push past 105°F in the Valley, an HVAC system losing 20–30% of its conditioned air through duct gaps isn’t just inefficient — it’s running at a serious deficit during the months you need it most. We apply mastic sealant and foil-backed tape to joints, transitions, and return air connections throughout the system, sealing the losses at their source rather than masking them with a higher thermostat setting. The difference in comfort — and on the electricity bill — is typically felt within the first cooling cycle.
Flex Duct Repair
North Hollywood’s housing stock — much of it built between the 1950s and 1970s — still runs a significant amount of original or early-generation flex duct. That material has spent decades in attics where summer temperatures routinely exceed 130°F, and the liner breaks down over time, developing cracks, tears, and full collapses that restrict airflow to entire rooms. In the Valley’s dingbat apartment buildings specifically, we regularly find shared flex runs routed through unventilated carport ceilings where temperatures can exceed 140°F — conditions that cause the inner liner to shed fiberglass particles directly into the airstream. We cut out damaged sections, replace them with rated flex duct, and reconnect joints properly so the fix holds for the long term.
Metal Duct Repair
Older galvanized sheet-metal trunk lines are common throughout the 91601, 91605, and 91606 zip codes, and they come with their own failure patterns — corroded seams, disconnected elbows, and joints that have vibrated loose after decades of HVAC cycling. We re-fasten, re-seal, and where necessary, fabricate replacement sections to restore the duct’s structural integrity. Metal duct work done properly lasts decades; a field repair with the right materials and technique is often the most cost-effective path forward rather than a full system replacement.
Duct Insulation
Uninsulated or under-insulated duct lines routed through North Hollywood attics are essentially air conditioning the attic rather than the living space — the thermal loss across an uninsulated metal trunk line in a 130°F attic is substantial enough to raise indoor temperatures noticeably even when the system is running. We wrap exposed trunk lines and replace degraded flex duct insulation using materials rated for Valley-level temperature extremes, and we pay particular attention to attic runs in older ranch-style homes near the NoHo Arts District and along Tujunga Avenue where this problem appears most frequently.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in North Hollywood
We work with the air-quality and HVAC brands that North Hollywood homeowners and property managers are most likely to already have installed: Honeywell and Aprilaire filtration and ventilation components, Abatement Technologies air scrubbers, and Guardsman duct sealing products are all part of our regular toolkit. When a job calls for compatible replacement parts or sealant materials, we carry stock sized for the duct configurations common in Valley-area homes — which means fewer delays and faster turnaround on repairs that need to be done before the next heat advisory hits.
Common Duct Repair & Sealing Problems We See in North Hollywood Homes
- Collapsed flex duct in attics and carport ceilings: The combination of extreme attic heat and aging liner material causes flex duct to collapse inward, sometimes cutting airflow to a room entirely. In North Hollywood’s dingbat apartment stock, this often goes undetected for years because the collapsed section sits inside a carport ceiling that nobody inspects regularly.
- Disconnected joints at trunk-line transitions: Decades of thermal expansion and contraction — especially pronounced given the Valley’s 40°F swing between winter nights and summer afternoons — causes metal duct joints to pull apart at the seams. We find fully open gaps in trunk lines throughout the 91602 and 91606 zip codes that are pumping conditioned air directly into wall cavities.
- Uninsulated or deteriorated duct insulation in attics: Post-war ranch homes throughout North Hollywood frequently have original insulation that has either fallen away, compressed to near-zero R-value, or was never properly applied to branch runs. With attic temperatures that regularly exceed 130°F from June through September, the heat transfer into uninsulated ducts is measurable within a few feet of a supply register.
- Mastic joint failure on older galvanized systems: Original mastic applications from the 1960s and 1970s dry out and crack over time, particularly on systems located near the Lankershim and Victory Boulevard corridor where older commercial-adjacent housing sees higher ambient particulate exposure. Once the mastic fails, conditioned air escapes at every major joint — and the system compensates by running longer, driving up energy costs month after month.
Pricing for Duct Repair & Sealing in North Hollywood, CA
Duct repair and sealing in North Hollywood is priced by the scope and access conditions of the job — attic work in a ranch-style home is different from navigating a carport-ceiling run in a multi-unit building. That said, here are honest ranges for what North Hollywood customers typically see:
- Mastic sealant application (whole-system): $280–$520 depending on system size and access
- Flex duct repair or section replacement: $150–$380 per section, based on run length and location
- Metal duct seam repair and re-fastening: $120–$300 per zone
- Duct insulation wrap (trunk lines): $200–$450 depending on linear footage and attic access
- Air leak repair (spot sealing at registers and boots): $90–$180
Multi-unit properties and systems requiring extensive attic or carport-ceiling access may fall outside these ranges — Paul will assess the specific conditions on-site and give you a clear number before any work begins. Call (424) 380-6917 for a free estimate; there’s no obligation and no pressure.
We Also Serve Cities Near North Hollywood
Our work in the Valley and surrounding areas extends well beyond North Hollywood. We regularly serve homeowners and property managers in Studio City, Universal City, and throughout the Hollywood Hills corridor connecting to Hollywood and West Hollywood. If you’re a property manager overseeing units across multiple neighborhoods, one call to (424) 380-6917 handles scheduling across all of them.
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 schedule North Hollywood jobs within a short turnaround from your call — typically within a few business days, and we prioritize cases where a collapsed or disconnected duct is causing immediate comfort or air-quality problems. Paul manages the schedule directly, so you’re not working through a call center. Call (424) 380-6917 and we’ll find the earliest slot that works.
Yes — we serve all of North Hollywood’s residential and commercial zip codes, including 91601, 91602, 91603, 91605, 91606, 91609, 91611, and 91612. Whether your property is near the NoHo Arts District, along Lankershim Boulevard, or tucked into the residential streets off Tujunga Avenue, we cover it.
Honestly, yes — and there’s a measurable reason for it. North Hollywood sits inside the San Fernando Valley’s inland heat pocket, where summer temperatures regularly hit 105–113°F and HVAC systems run nearly continuously for four to five months. The Valley also traps particulate pollution — wildfire smoke from the Verdugo and Santa Monica mountains, plus heavy road-traffic particulates — at rates that consistently rank among the worst air-quality readings in LA County. A leaking or damaged duct system in North Hollywood is moving that contaminated air through your living space at a pace that coastal neighborhoods simply don’t experience. The case for addressing duct problems promptly here is stronger than in most of Los Angeles.
Our pricing across North Hollywood, Studio City, Universal City, and West Hollywood falls within the same ranges — we don’t apply different rates based on zip code. What does vary is the job’s scope: older housing in North Hollywood tends to involve more access complexity (carport ceilings, cramped attics, aging multi-unit trunk lines), which can affect the final figure. A free on-site estimate before any work starts means you’ll have a clear, specific number — not a range that balloons after the job begins. Call (424) 380-6917 to set one up.
Every repair Paul performs is backed by his direct accountability as the person who did the work — not a corporate warranty department you’d have to navigate. If a sealed joint fails or a repaired flex section develops a problem, we come back and address it. Nine years in business and 613 reviews averaging 4.9 stars reflect a track record built on jobs that hold up, not on fine-printed guarantees. Reach us at (424) 380-6917 if you have any concerns after a job — you’ll talk to Paul directly.
Schedule Your Free Duct Repair Estimate in North Hollywood
If your North Hollywood home is running hotter than it should, your energy bills have been climbing without explanation, or you’ve noticed dust or a musty smell at your registers, damaged or leaking ducts are the most likely culprit. Paul Johnson and the Pure Air Duct Cleaners team are ready to inspect, diagnose, and repair your duct system — using professional-grade equipment and materials that hold up to Valley conditions. Call (424) 380-6917 today to schedule your free estimate. No sales pitch, no pressure — just a straight answer about what your ducts need and what it will cost to fix them right.
Reviewed by Paul Johnson, Owner & Lead Technician at Pure Air Duct Cleaners West Hollywood, serving North Hollywood and the greater San Fernando Valley for 9 years.
