Fast, Reliable Duct Repair & Sealing Across Malibu
Most duct repair and sealing jobs in Malibu run $280-$680 and are finished in a single visit, with our crew typically arriving within 90 minutes of your call. We cover all Malibu ZIP codes - 90263, 90264, and 90265 - from the beach cottages of Malibu Colony to the rebuilt hillside homes along Kanan Dume and Latigo Canyon. If your vents are blowing dust, your energy bills have climbed, or you’re catching the smell of old smoke, we’ll inspect the system with a camera, show you exactly what we find, and seal it right. Call (855) 401-6006 for a free estimate.
We’ve been driving these canyon roads since 1984. Roger Castañeda and our team know that Malibu ductwork faces a combination of conditions you won’t find bundled together anywhere else in Southern California. The marine layer rolls in heavy near PCH. Santa Ana winds blast dry heat and ash through hillside intakes. And since the Woolsey Fire, hundreds of rebuilt homes have duct systems that look new on the outside but still harbor contamination on the inside. That’s why our Duct Repair & Sealing work here is different from what we do in Agoura Hills or Thousand Oaks. The materials, the access challenges, and the contamination profiles all require a specific approach.
Why Bellows Air Duct & Vent Co. of California Is Malibu’s Preferred Duct Repair & Sealing Company
We’ve served Malibu homeowners for over 42 years. Roger Castañeda built this company on the principle that the job isn’t done until the homeowner sees the proof - which is why we camera-inspect every duct system before we touch it and again before we leave. Malibu customers call us back because we answer the phone live, 24 hours a day, and because our 90-Day Done Right Promise means we return at no charge if anything isn’t right. No paperwork, no arguing.
Our response time to Malibu averages under 90 minutes during business hours, and our technicians are background-checked, uniformed, and equipped to handle both the tight crawlspaces of 1960s beach cottages and the long, convoluted duct runs of modern hillside rebuilds. We don’t bait-switch on price. The number we quote on the phone is the number on the invoice, disclosed before a single tool is lifted.
Our Duct Repair & Sealing Services in Malibu
Duct Sealing with Mastic Sealant
Standard duct tape fails in Malibu. The Santa Ana heat bakes it brittle in canyon homes, and salt air corrodes the adhesive in beachside properties. We seal every joint with professional-grade mastic sealant, applied by hand and cured properly. In Malibu Colony, where metal ducts sit in salt-air-exposed crawlspaces, we use marine-grade adhesive and double-wrap critical joints. A typical mastic sealing job for a 2,000-square-foot Malibu home runs $340-$520.
Flex Duct Repair
Flex duct is common in post-2018 Woolsey Fire rebuilds, but new doesn’t mean clean. Construction dust and residual ash lodge in the accordion folds, and the long runs along Latigo Canyon and Malibu Canyon Road trap debris where standard equipment can’t reach. We use Rotobrush flexible inspection tools to access these convoluted systems, then repair or replace damaged sections and reseal every connection. Flex duct repair in Malibu typically costs $280-$450 per run.
Metal Duct Repair
Older Malibu homes, especially the mid-century cottages near the Colony, have galvanized metal ductwork that corrodes from decades of marine layer humidity. We patch small breaches, replace rusted sections, and apply protective coatings where salt air exposure is severe. Metal duct repair in Malibu runs $380-$680 depending on accessibility and extent of corrosion.
Duct Insulation
Homes set back from PCH in canyon draws lose significant efficiency through uninsulated ductwork. The marine layer fog pools overnight, creating condensation inside ducts that breeds mold and mildew. We install foil-faced fiberglass insulation on crawlspace and attic runs, sealed at every seam, to maintain temperature and block moisture intrusion. Duct insulation in Malibu typically costs $420-$780 for a full system.
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.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Malibu
We stock parts and materials from Honeywell, Aprilaire, and Nikro - the same brands serious HVAC contractors specify for coastal environments. Honeywell media air cleaners integrate well with the smart-home systems common in Malibu’s newer rebuilds. Aprilaire humidifier and dehumidifier components help control the moisture issues our marine layer creates. And Nikro’s HEPA vacuum and agitation equipment lets us clean flex duct systems thoroughly without damaging the liner. We carry these parts on our trucks, so most Malibu jobs don’t wait on a warehouse run.
Common Duct Repair & Sealing Problems We See in Malibu Homes
- Standard mastic failing on salt-air-exposed metal ducts. In Malibu Colony and beachfront properties, conventional sealant degrades within two to three years. We find cracks and gaps that draw in crawlspace air, and we reseal with marine-grade adhesive rated for coastal corrosion.
- DIY duct tape repairs disintegrating under Santa Ana heat. Canyon homeowners often try quick fixes that bake, peel, and leave gaps. The tape residue actually traps more dust, and the underlying leak worsens until we strip it and apply proper mastic.
- Hidden ash contamination in post-fire rebuilds. Homeowners assume new ducts are clean. They’re not. Construction dust and residual soot from the Woolsey Fire cycle through living spaces for years until we seal the system and vacuum every fold with HEPA equipment.
- Moisture intrusion in uninsulated hillside ductwork. Homes above Malibu in the Latigo Canyon and Kanan Dume areas have long runs through cool crawlspaces where fog condensation pools. Without insulation, this leads to mold growth and metal corrosion that requires section replacement.
Pricing for Duct Repair & Sealing in Malibu, CA
| Service | Typical Range in Malibu |
|---|---|
| Mastic sealant sealing (full system) | $340-$520 |
| Flex duct repair (per run) | $280-$450 |
| Metal duct repair (sectional) | $380-$680 |
| Duct insulation (full system) | $420-$780 |
| Air leak repair (localized) | $180-$320 |
These are honest ranges for Malibu’s market, not bait prices. What moves a job toward the higher end: difficult crawlspace access in older beach cottages, extensive corrosion requiring multiple metal sections, or post-fire rebuilds needing complete system cleaning before sealing. We inspect with a camera first, show you the footage, and quote upfront before any work begins. Our $50 Off Any Repair Over $250 standing offer applies, and we always honor our permanent 5% Senior and Veteran discount. Free estimates, no obligation.
We Also Serve Cities Near Malibu
Our crews run the full 101 corridor from Malibu through Agoura, Agoura Hills, Westlake Village, and Thousand Oaks. Same trucks, same equipment, same upfront pricing. The duct challenges differ by city - less salt air inland, different fire history - but our inspection and sealing standards don’t change.
Serving Malibu, CA - Our Local Coverage Area
We’re based in the Malibu 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 Malibu
Because ash and soot embedded in flex duct folds during evacuation and construction, and standard filter changes don’t reach it. We recently sealed a flex duct system in a rebuild up Latigo Canyon where the homeowner noticed fine gray ash blowing from vents three years after the Woolsey Fire. Our crew used Rotobrush equipment to inspect and found ash embedded in duct folds; we reapplied mastic sealant at every joint and insulated the crawlspace runs to prevent future moisture intrusion from the coastal fog. Call (855) 401-6006 for a free inspection - estimates are free.
Yes, especially if your home sits in a canyon draw where fog pools overnight. Uninsulated flex duct in cool crawlspaces absorbs moisture through the outer jacket, degrading the inner liner and creating conditions for mold. We inspect for moisture damage and install proper insulation where needed. Call (855) 401-6006 to schedule - estimates are free.
Check for dust streaks around vent covers, sudden increases in your energy bill, or the smell of hot, dry air from your crawlspace or attic when the system runs. Santa Ana winds pressurize leaks and force chaparral dust through gaps that normal onshore flow doesn’t stress. If you notice these signs, we’ll camera-inspect and reseal with mastic rated for temperature cycling. Call (855) 401-6006 - estimates are free.
Yes. We patch minor corrosion and replace sections where rust has perforated the metal, then apply marine-grade sealant and protective coating. Severe cases may require section replacement, but we never sell a full system replacement when targeted repair will solve it. Call (855) 401-6006 for an honest assessment - estimates are free.
Yes. Homes along Kanan Dume, Latigo Canyon, and Malibu Canyon Road have longer duct runs through cooler, more humid zones where the marine layer lingers. Insulation prevents condensation, protects against mold, and maintains the efficiency your system was designed for. A typical hillside insulation job runs $420-$780. Call (855) 401-6006 for a free estimate.
We’re ready when you are. Call (855) 401-6006 for a free estimate on duct repair and sealing in Malibu. We’ll answer live, schedule promptly, and show up when we say. Every job carries our 90-Day Done Right Promise in writing, and you’ll see the before-and-after camera proof yourself.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co., serving Malibu since 1984.