Fast, Reliable Duct Repair & Sealing Across West Hollywood
Duct repair and sealing in West Hollywood typically costs $280-$650 for most apartment and townhome jobs, with same-day or next-day scheduling available throughout the 90069 zip code. Our Duct Repair & Sealing team has worked the narrow streets and alley-access buildings of this city for over four decades, and we understand the constraints that come with a 1.9-square-mile footprint where parking is tight and building access is often through rear service corridors.
We answer calls live, 24 hours a day, at (844) 685-6342. Most West Hollywood repairs are completed in a single visit by background-checked, uniformed technicians who arrive with the parts and sealants already on the truck.
Why Bellows Air Duct & Vent Co. Is West Hollywood’s Preferred Duct Repair & Sealing Company
We’ve been driving to West Hollywood since 1984, long before the current wave of HVAC companies bought their first vans. That longevity means something in a city where roughly 80% of residents rent, and where a single botched duct job can affect four to twelve neighboring units in a shared air-handling system.
Our reviews from West Hollywood customers consistently mention two things: we show up when we say we will, and the price quoted on the phone matches the invoice. No bait coupons, no upsells at the door. Our 90-Day Done Right Promise is stamped on every job, in writing. If it’s not right, we make it right. No paperwork, no arguing.
Response time to West Hollywood averages under 90 minutes during business hours because our Los Angeles-based technicians know the local grid: Fountain Avenue traffic patterns, the loading-zone restrictions on Sunset Boulevard, and which buildings on Laurel Avenue require advance notice to property management. We don’t waste time circling for parking or hunting for rear access. We’ve been here before.
Ray Castillo, who leads Bellows Air Duct & Vent Co., set the standard that every technician must camera-inspect ductwork before and after every repair. In West Hollywood’s older multi-unit buildings, that visual record protects both the tenant and the landlord, documenting exactly what was sealed and what condition the shared trunk lines were in when we arrived.
Our Duct Repair & Sealing Services in West Hollywood
Mastic Sealant Application
Mastic sealant is the backbone of lasting duct repair in West Hollywood’s aging apartment stock. We apply professional-grade mastic by brush or spray to joints, seams, and connection points where metal meets flex or where decades of thermal cycling have cracked original seals. In buildings on Sweetzer Avenue and Havenhurst Drive, we’ve found that original mastic from the 1960s has turned brittle and powdery, allowing conditioned air to leak into wall cavities before it ever reaches the vent. Our reapplication includes a full pressure test to verify seal integrity across the entire run.
Flex Duct Repair
Flex duct runs in West Hollywood’s 1950s-1970s buildings are often original, with fiberglass insulation that has compressed or torn where the duct bends around tight framing. We recently sealed a flex duct rupture in a building on Havenhurst Drive where a tenant’s DIY puncture had leaked conditioned air for months. Using Rotobrush equipment, we mended the tear with aluminum tape and mastic, then pressure-tested the entire shared trunk line serving four apartments to ensure no additional leaks. Flex duct repair in West Hollywood typically runs $280-$420 per run, depending on access and whether the insulation layer requires replacement.
Metal Duct Repair
Galvanized steel ductwork in pre-1970s West Hollywood buildings suffers from rust at low points where condensation collects, and from seam separation where decades of vibration have worked fasteners loose. We patch small corrosion holes with galvanized sheet metal and seal with mastic, or replace entire sections when the metal has thinned beyond repair. Metal duct repair in West Hollywood typically costs $350-$650, with higher-end jobs involving multiple sections of shared trunk line in buildings with original asbestos-containing duct wrap that must be abated before we can safely access the metal beneath.
Duct Insulation Replacement
Degraded fiberglass duct wrap in West Hollywood’s older apartments does more than lose R-value. It can release fibers into the airstream and, in buildings constructed before 1970, may contain asbestos requiring abatement protocols before sealing work can proceed. We coordinate with certified abatement contractors when necessary, then install new foil-faced insulation rated for the temperature and humidity conditions of shared air-handling systems. Duct insulation work in West Hollywood ranges from $180 for localized repair to $800+ for full trunk line recovery in larger buildings.
Air Leak Repair
Air leak detection in West Hollywood’s dense multi-unit housing requires methodical pressure testing, not guesswork. A leak in one unit’s branch can depressurize adjacent apartments, drawing unfiltered air through wall cavities and triggering tenant complaints that seem to move from floor to floor. We map the entire shared system, seal identified leaks with appropriate materials for each duct type, and verify results with post-repair pressure testing. Air leak repair in West Hollywood typically runs $320-$580 for standard apartment systems.
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 West Hollywood
We stock parts and sealants from Nikro, Honeywell, and Aprilaire on every West Hollywood service truck, which means most repairs don’t require a return trip. Nikro’s duct repair tools handle the tight clearances of alley-access buildings where a full-sized van can’t park at the entrance. Honeywell and Aprilaire air quality components integrate with the older shared systems common in West Hollywood’s apartment stock, allowing us to restore function without forcing incompatible upgrades on property managers who need to maintain dozens of units on fixed budgets. When we say we’ll be there when we say, we mean with the right parts already in hand.
Common Duct Repair & Sealing Problems We See in West Hollywood Homes
- Degraded fiberglass duct wrap requiring abatement protocols. Pre-1970s apartment buildings throughout the 90069 zip code retain original insulation that may contain asbestos. We identify this during camera inspection and coordinate certified abatement before sealing work proceeds, protecting tenants and limiting landlord liability.
- Shared central air handler depressurization. A leak in one unit’s branch line can pull conditioned air from adjacent apartments, creating temperature complaints that migrate through the building. Our pressure-testing protocol maps the entire shared system to eliminate these phantom problems.
- Wildfire soot accumulation in roof-mounted intakes. Technicians working north-side WeHo buildings, particularly older complexes on Laurel Avenue, Havenhurst Drive, and Sweetzer Avenue that back up toward the canyon, routinely pull out duct debris with visible layers of charcoal-black soot banded between years of ordinary dust. This stratigraphic record of successive fire seasons requires thorough cleaning before sealing can be effective.
- Alley-access equipment constraints. Narrow pathways and tight turns between buildings force careful equipment staging. We’ve learned which buildings require compact tools, which need advance coordination with property management, and how to protect existing ductwork during extraction and replacement in spaces never designed for modern HVAC equipment.
Pricing for Duct Repair & Sealing in West Hollywood, CA
Most duct repair and sealing jobs in West Hollywood fall between $280 and $650, with simpler flex duct repairs at the lower end and multi-unit shared system work at the higher end. Here’s how typical projects break down:
- Flex duct repair (single run): $280-$420
- Metal duct patch or section replacement: $350-$650
- Mastic sealant application (standard apartment system): $320-$480
- Air leak detection and repair: $320-$580
- Duct insulation replacement (localized): $180-$340
- Duct insulation replacement (full trunk line): $600-$850+
Factors that affect your specific price: whether the building has original asbestos-containing duct wrap requiring abatement, how many units share the air handler, access constraints that extend labor time, and whether wildfire soot remediation is needed before sealing can be effective. We disclose all pricing upfront before any work begins. The number we quote is the number on the invoice. We also honor our standing offers: $50 off any repair over $250, a free second opinion on any written estimate, and a permanent 5% senior and veteran discount.
Call (844) 685-6342 for a free estimate. We’ll ask the right questions about your building, your system, and your access constraints so there are no surprises when we arrive.
We Also Serve Cities Near West Hollywood
Our technicians regularly work in West Hollywood and the surrounding communities, including Hollywood, Andover, Miramar, and West Park. The same upfront pricing, camera-verified results, and 90-Day Done Right Promise apply in every city we serve.
Serving West Hollywood, CA - Our Local Coverage Area
We’re based in the West 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 West Hollywood
Yes, you typically need written landlord or property management approval before we can access shared duct systems in West Hollywood’s multi-unit buildings. Because roughly 80% of WeHo residents rent and most buildings use central air handlers serving multiple units, a repair in your unit often affects neighboring apartments. We can coordinate directly with your property manager, provide camera documentation of our findings, and schedule work that minimizes disruption to other tenants. Call (844) 685-6342 and we’ll walk you through what’s needed for your specific building.
Shared duct systems in West Hollywood’s 1950s-1970s buildings should be inspected every three to five years and sealed as needed. The combination of original flex duct aging, thermal cycling in our mild but dry climate, and periodic wildfire soot intrusion accelerates seal degradation compared to newer construction in less dense areas. We recommend camera inspection to catch leaks before they depressurize adjacent units. Our $89 Seasonal Tune-Up includes a basic duct integrity check.
Duct sealing alone will not remove existing wildfire smoke contamination, but it is essential to prevent recontamination after proper cleaning. In buildings near Laurel Canyon and the Hollywood Hills, roof-mounted HVAC intakes draw in concentrated smoke and ash during Santa Ana fire season. We clean the system first, then seal all leaks that could pull unfiltered air through wall cavities. The sealing step is what keeps the clean air clean. For active smoke odor, ask about our combined duct cleaning and sealing service.
Water-based mastic sealant, reinforced with aluminum tape at high-stress joints, is the standard for flex duct repair in West Hollywood’s aging apartment stock. Mastic remains flexible after curing, which accommodates the vibration and minor movement common in shared air-handling systems. We avoid solvent-based products that off-gas in tight interior spaces. Our technicians apply mastic by brush in confined areas and by spray where access allows, then verify coverage with camera inspection.
Yes, we repair galvanized metal ductwork in pre-1970s West Hollywood buildings, but we first camera-inspect to assess whether original asbestos-containing duct wrap is present. If asbestos is found, we coordinate with certified abatement contractors before accessing the metal. Once clear, we patch corrosion holes with matching galvanized sheet, reseam separated joints with mastic and mechanical fasteners, and pressure-test to verify integrity. Metal duct repair in these older buildings typically runs $350-$650 depending on access and extent of corrosion.
Ready to stop losing conditioned air to your walls or neighboring units? Call (844) 685-6342 for a free estimate. We’ll be there when we say, we’ll show you the camera footage before and after, and we’ll stand behind the work with our 90-Day Done Right Promise - no paperwork, no arguing.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving West Hollywood since 1984.