Fast, Reliable Duct Repair & Sealing Across Agoura
We answer calls from Agoura at all hours, and we’re usually on your street within the hour when ductwork fails. Bellows Air Duct & Vent Co. of California has repaired and sealed duct systems in Agoura’s hillside neighborhoods since 1984, from the older tracts off Kanan Road to the canyon pockets near Cornell Way and the post-Woolsey rebuilds along Ladyface Court. Our technicians carry insulated flex duct, professional mastic, and metal repair stock on every truck, so most Agoura jobs finish in a single visit. If your vents blow weak, your attic smells musty, or your energy bill climbed without explanation, call (855) 401-6006 for a free estimate with upfront pricing.
Why Bellows Air Duct & Vent Co. of California Is Agoura’s Preferred Duct Repair & Sealing Company
Agoura homeowners know the difference between a company that sends a salesman and one that sends a technician who can actually fix the problem. We’ve earned that reputation over 42 years by showing up when we say, explaining the work before we start, and standing behind it with our 90-Day Done Right Promise in writing.
Our Agoura customers call us back because we camera-inspect every duct system before and after repair. You see what we see. No claims, no guessing. That transparency matters especially in Agoura’s older hillside homes, where original ductwork hides problems behind drywall and attic insulation.
Calls are answered by a live person, 24 hours a day, not an app or voicemail tree. When a Santa Ana wind event blows dust through compromised seals or a post-Woolsey ash deposit finally breaks loose, you reach someone who can dispatch help.
Our pricing is disclosed before a single tool is lifted. The number on the phone is the number on the invoice. No bait coupons, no price changes at the door. That’s been our practice since Roger Castañeda founded Bellows in 1984, and it’s not changing.
Our Duct Repair & Sealing Services in Agoura
Duct Sealing with Mastic Sealant
Agoura’s 1970s-1990s hillside tract homes frequently have original flexible ductwork with brittle, age-cracked liners and disconnected joints, exacerbated by Santa Ana windborne debris and post-Woolsey ash infiltration that accelerates seal failure. We apply professional-grade mastic sealant, not tape, at every joint and penetration. Mastic remains flexible through thermal cycles and bonds to ash-contaminated surfaces better than pressure-sensitive products. A typical mastic sealing job for an Agoura home up to 2,500 square feet runs $450-$780.
Flex Duct Repair
Original flex duct in Agoura attics has endured 30-50 years of dry-season heat, rodent activity, and particulate loading. The inner liner tears, the insulation compresses, and the jacket degrades. On Cornell Way in a Woolsey-affected pocket, we sealed a 1980s flex-duct system where the original mastic had crumbled after decades of thermal cycling and ash exposure. We replaced three torn flex runs with new insulated duct and applied fresh mastic at all joints, restoring flow and preventing attic air infiltration. Flex duct replacement in Agoura typically costs $180-$340 per run, with most homes needing 2-5 runs.
Metal Duct Repair
Some Agoura homes, particularly earlier builds and custom hillside properties, retain galvanized metal ductwork. We repair separated seams, corroded sections, and failed dampers. Where metal has degraded beyond repair, we section in new galvanized or transition to insulated flex. Metal repair in Agoura runs $280-$560 for spot work; full section replacement runs $650-$1,200 depending on access and length.
Duct Insulation
Uninsulated or degraded duct insulation in Agoura attics wastes conditioned air and invites condensation during rare humid periods. We install new foil-faced insulation rated for California Title 24 requirements, sealed at all seams. Attic temperatures in Agoura’s exposed hillside homes can exceed 140°F in summer, making proper insulation critical to system efficiency. Duct insulation work in Agoura typically ranges $380-$720.
What happens when you call
- 1
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 Agoura
Our trucks carry Rotobrush inspection systems and Nikro HEPA recovery equipment, the same brands serious HVAC contractors specify for California residential work. We stock mastic compounds from Abatement Technologies rated for high-heat attic environments. For Agoura homeowners, this means no waiting for special orders. When our technician identifies a failed seal or torn flex run during camera inspection, the repair begins immediately. Most Agoura jobs complete in one visit.
Common Duct Repair & Sealing Problems We See in Agoura Homes
- Original mastic joints dry out and crack, especially in homes that ran HVAC during Woolsey smoke events, allowing conditioned air to leak into unconditioned attics. We find this in nearly every pre-1990 Agoura home we inspect.
- Flex duct jackets degrade from dry-season heat cycles and rodent gnawing in canyon-exposed attics, causing tears that bypass filtration entirely. Agoura’s prolonged eight-month dry season accelerates this failure mode.
- Santa Ana windblown chaparral dust settles in duct low points, creating air blockages that shift during winds and break sealant bonds. These blockages force blowers to work harder and shorten equipment life.
- Post-Woolsey ash residue remains in duct interiors even in homes that survived structurally. Technicians working in post-Woolsey neighborhoods frequently find visible gray-black ash coating duct walls, evidence that HVAC systems ran during the smoke event and were never professionally remediated afterward.
Pricing for Duct Repair & Sealing in Agoura, CA
Here’s what duct repair and sealing costs in Agoura’s market:
| Service | Typical Range in Agoura |
|---|---|
| Mastic sealant application (whole system) | $450-$780 |
| Flex duct repair/replacement (per run) | $180-$340 |
| Metal duct spot repair | $280-$560 |
| Metal duct section replacement | $650-$1,200 |
| Duct insulation (whole system) | $380-$720 |
| Air leak detection and sealing | $320-$580 |
Costs vary with attic access, contamination level, and whether post-Woolsey ash remediation is needed. We disclose all pricing before work begins. Our standing offers apply: $50 off any repair over $250, free second opinion on any written estimate, and a permanent 5% senior and veteran discount. Call (855) 401-6006 for an exact quote. Estimates are free.
We Also Serve Cities Near Agoura
Our Duct Repair & Sealing in Agoura coverage extends to Agoura Hills, Westlake Village, Oak Park, and Thousand Oaks. Same response standards, same upfront pricing, same 90-Day Done Right Promise. If you’re in a neighboring community and your ductwork needs attention, we answer those calls too.
Serving Agoura, CA - Our Local Coverage Area
We’re based in the Agoura 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 Agoura
Yes. Homes that survived structurally but ran HVAC during or immediately after the fire likely drew smoke, ash, and char particulates deep into ductwork, and many have never been inspected since. We find visible gray-black ash residue in post-Woolsey neighborhoods regularly, even in intact homes. That contamination degrades seals, restricts airflow, and circulates particulates every time the system runs. Call (855) 401-6006 for a camera inspection. Estimates are free.
Original flex duct in Agoura’s 1970s-1990s tract homes typically fails between 25 and 40 years, but Santa Ana windborne debris and post-Woolsey ash exposure accelerate seal failure by 5-10 years in many cases. If your home is 30-plus years old and has never had ductwork serviced, inspection is warranted. Call for a free assessment.
We can repair most original metal ductwork in Agoura’s older homes. Separated seams, small corroded sections, and failed dampers are fixable in place. Full replacement is only necessary when metal is extensively corroded or access makes repair impractical. We’ll show you camera footage and explain both options with exact pricing before you decide.
Yes. Agoura’s canyon-and-foothill geography funnels Santa Ana winds directly into HVAC intakes, loading filters and depositing fine desert dust and chaparral pollen into duct systems. That particulate accumulates in low points, shifts during wind events, and stresses sealant bonds. The prolonged dry season means these deposits never get flushed out naturally. Regular inspection and sealing prevents the cumulative damage.
Watch for uneven heating or cooling between rooms, dust blowing from vents immediately after filter changes, musty or ash-like odors when the system starts, and energy bills that rise without rate changes. In post-Woolsey Agoura homes, ash residue breaking loose from duct walls often causes sudden odor or particulate issues years after the fire. If you notice any of these, call (855) 401-6006 for a camera inspection. We’ll show you exactly what’s inside your ducts.
Ready to fix your ductwork? Call (855) 401-6006 for a free estimate. Our Duct Repair & Sealing team serves Agoura with upfront pricing, camera-verified results, and a 90-Day Done Right Promise in writing. We’ll be there when we say. No surprises on the bill.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Agoura since 1984.