Duct Repair & Sealing in West Hills - Same-Day Service, Done Right the First Time

Fast, Reliable Duct Repair & Sealing Across West Hills

Duct repair and sealing in West Hills, California typically runs $280-$650 for most residential jobs, with same-day service available throughout ZIP codes 91307 and 91308. We’re Bellows Air Duct & Vent Co., and we’ve been driving out to West Hills from our Los Angeles base for over 42 years. The homes here aren’t like the rest of the Valley. Large lots, detached workshops, long flexible duct runs through baking attics, and the lingering effects of the 2018 Woolsey Fire mean standard ductwork fixes often fall short. We bring the heavy-duty equipment and the patience to do it in one trip. Call (855) 401-6006 for a free estimate - we’ll show you the price before we lift a single tool.

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Why Bellows Air Duct & Vent Co. of California Is West Hills’s Preferred Duct Repair & Sealing Company

We’ve built our reputation in West Hills on showing up when we say and leaving the job done right. Homeowners near Platt Ranch and along the western edge of 91307 know our trucks because they’ve seen us return to neighbors - not for callbacks, but for the next project.

Our reviews from West Hills customers consistently mention the camera inspection. They expected a claim; they got a video record of before and after. That’s the difference between a company that competes on coupons and one that competes on never needing to be called back.

Response time to West Hills averages under 90 minutes during business hours. The Simi Hills corridor puts you at the far western reach of the Valley, but we schedule accordingly and don’t overbook the route. Our technicians are background-checked, uniformed, and carry the equipment to complete most repairs in a single visit - critical when you’re dealing with a detached workshop or a long attic run that can’t wait for a parts run.

We know the local housing stock. The 1960s-1970s ranch tracts with attic-routed ductwork baking at 130°F+. The 1980s developments near Platt Ranch with their history of kinked flex runs. The hillside properties where Santa Ana winds drive debris straight into return vents. This isn’t generic Valley knowledge. It’s West Hills-specific, and it changes how we approach every repair.

Our Duct Repair & Sealing Services in West Hills

Duct Sealing

Leaky ducts in West Hills homes waste more energy than most owners realize. The extreme summer heat - routinely 105°F+ from June through September - forces HVAC systems to run almost continuously. Every gap at a joint or seam pumps conditioned air into your attic and draws in hot, dusty attic air in return. Our Duct Repair & Sealing team applies professional-grade mastic sealant to every joint, seam, and connection point. We camera-inspect before and after, so you see the seal, not just hear about it. In West Hills, we often find that previous sealing attempts failed because standard mastic was applied over soot-coated metal from the Woolsey Fire without proper degreasing first. We do the prep work that makes the seal last.

Flex Duct Repair

Flexible duct runs are common in West Hills homes, especially in the 1980s-era developments near Platt Ranch and in detached workshops on larger lots. These long, concealed runs develop kinks that trap debris and restrict airflow. Standard trunk-and-branch flushing can’t reach these dead zones. We isolate the affected section, repair or replace the damaged flex, and use targeted negative-air extraction to clear what standard cleaning leaves behind. On a 1970s ranch home near Platt Ranch, our crew encountered a detached workshop with a long, kinked flexible duct run that had trapped Woolsey Fire ash since 2018. We isolated the run, applied mastic sealant to two kinked joints, and used a Rotobrush negative-air system to extract the embedded soot, restoring airflow without replacing the entire run.

Metal Duct Repair

The older ranch-style tract homes that dominate West Hills - built largely in the 1960s and 1970s - rely on galvanized metal trunk lines with flex branch takeoffs. After 50+ years of 130°F+ attic cycles, these metal ducts develop corrosion at seams, separated joints, and occasional punctures from decades of maintenance traffic. We repair metal sections with proper mechanical fastening and seal with mastic rated for the temperature swings West Hills attics deliver. Where sections are too far gone, we replace with metal that matches the original gauge and seal to the same standard.

Duct Insulation

West Hills attics are among the hottest in Los Angeles County. Duct insulation isn’t an upgrade here; it’s a necessity for keeping conditioned air cool enough to reach your vents. We install foil-faced fiberglass duct wrap and rigid insulation board where appropriate, sealed at every seam. For homes running AC through uninsulated or degraded attic runs, this single improvement often drops supply air temperature by 10-15°F before it ever reaches your living space. The investment pays back fast when your system isn’t fighting 130°F attic air for six months straight.

Mastic Sealant Application

Mastic is our standard for sealing in West Hills, not tape. Tape fails in the attic heat. Mastic remains flexible and maintains its bond through thousands of thermal cycles. We apply it with a brush at every joint, seam, and connection, then camera-verify complete coverage. The critical detail for West Hills: mastic won’t bond to soot-coated surfaces without proper degreasing and prep. We’ve seen too many “sealed” systems re-leak within months because this step was skipped. We don’t skip it.

Trusted Brands We Service in West Hills

We stock parts and specify equipment from the brands that serious HVAC contractors trust: Rotobrush for our negative-air cleaning systems, Abatement Technologies for containment and filtration, and Aprilaire for air quality components. For West Hills customers, this means fast turnaround without waiting for parts to ship. Most jobs are completed in a single visit because our trucks carry what we need. We don’t make excuses about supply chains, and we don’t bait you with a low price only to add parts charges at the door. The number we quote is the number on the invoice.

Common Duct Repair & Sealing Problems We See in West Hills Homes

• Santa Ana wind ash infiltration. The Simi Hills corridor funnels Santa Ana events directly through 91307-91308, driving dust and wildfire ash into return-air intakes. Standard sealing fails because mastic doesn’t bond to soot-coated metal without prior degreasing - a step discount operators routinely skip.
• Kinked flex ducts in long attic runs. Homes near Platt Ranch and on larger lots often have flexible duct runs stretched to their limit, creating debris-trapping dead zones that standard flushing cannot reach. These require isolation and targeted extraction, not blanket cleaning.
• Visible patches masking hidden ruptures. Homeowners in West Hills often spot and patch the accessible leak while missing ruptures in buried attic sections. Our camera inspection finds what you can’t see from the hatch.
• Premature mastic failure from extreme heat cycling. West Hills homes run AC continuously during 105°F+ heat waves, causing standard sealant to dry and crack at duct joints within months. We use high-temperature-rated mastic and proper surface prep to prevent this.

Pricing for Duct Repair & Sealing in West Hills, CA

We Also Serve Cities Near West Hills

Our service area extends throughout the western San Fernando Valley. We regularly perform Duct Repair & Sealing in West Hills and neighboring communities including Canoga Park, Woodland Hills, Calabasas, and Chatsworth. The same crew, same equipment, same 90-Day Done Right Promise applies across every zip code we cover.

FAQs - Duct Repair & Sealing in West Hills