Duct Repair & Sealing in Los Gatos - Same-Day Service, Done Right the First Time

Fast, Reliable Duct Repair & Sealing Across Los Gatos

Duct repair and sealing in Los Gatos typically runs $280-$750 for most residential jobs, with same-day or next-day scheduling available throughout the 95030, 95031, 95032, and 95033 ZIP codes. We’re Duct Repair & Sealing in Los Gatos regularly, from the valley-floor ranch homes near Los Gatos High School to the hillside cabins off Summit Road and Black Road in the Santa Cruz Mountains. Our technicians carry the brackets, mastic, and insulation needed to handle both the straightforward metal-duct sealing common in 1950s-1970s ranches and the re-support work that mountain-zone flex duct often demands. Call (855) 401-6006 and a live person will answer, 24 hours a day.

Call (855) 401-6006

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

We’ve been driving to Los Gatos since 1984, long enough to know which crawlspaces under Blossom Hill homes flood in January and which mountain driveways freeze solid enough to strand a van. Roger Castañeda built this company on showing up when promised and pricing the work before a tool leaves the truck. That hasn’t changed.

Our Los Gatos customers call back because they don’t have to. The 90-Day Done Right Promise is stamped on every invoice: if the seal fails or the support sags, we return at no charge. No paperwork to file, no manager to escalate. We fix it.

Response time to Los Gatos averages same-day for calls placed before noon, next-morning for afternoon requests. Mountain-zone jobs in 95033 sometimes need a second technician for crawlspace safety, and we schedule that upfront so no one waits around.

Every job gets camera-inspected before and after. You see what we see: the gap at the galvanized joint, the sag collecting debris, the mastic bead sealing it shut. That’s the record. Not a claim.

Our Duct Repair & Sealing Services in Los Gatos

Duct Sealing with Mastic Sealant

Air leaks at duct joints waste 20-30% of conditioned air in a typical Los Gatos home, and valley-floor ranches with original galvanized ductwork are especially prone. We brush on mastic sealant, a water-based compound that remains flexible for decades, at every joint and seam. In Los Gatos’s 95030 and 95032 neighborhoods, where ranch homes often have duct runs through unconditioned attics, this sealant prevents the conditioned air you’re paying for from bleeding into spaces you don’t heat or cool. A typical mastic sealing job in Los Gatos runs $280-$450 for a single system.

Flex Duct Repair

Flexible duct tears, crushes, and disconnects more easily than metal, and in Los Gatos’s 95033 mountain zone, it’s often installed without adequate hangars on steep joist bays. Last spring, we tackled a duct repair in the 95033 mountain area off Summit Road, where smoke residue from the CZU Complex had settled in a sagging flex duct over a steep crawlspace. After re-supporting the run with additional hangars, we sealed the leaks with mastic and wrapped the ducts in insulation, using Honeywell dampers to balance airflow throughout the cabin’s non-standard layout. Flex duct repair in Los Gatos typically costs $320-$580, depending on access difficulty and whether re-support is needed.

Metal Duct Repair

Galvanized steel ducts in older Los Gatos homes corrode at seams, separate at collars, and rattle loose from vibration. We cut out damaged sections, fabricate replacements on-site, and seal with mastic and fiberglass mesh for a permanent repair. Metal work runs $380-$650 in Los Gatos, with larger jobs involving multiple trunk lines toward the higher end.

Duct Insulation

Marine fog channeling through the Santa Cruz Mountain passes keeps Los Gatos more humid than open San Jose valley floors. That moisture condenses inside poorly sealed metal ducts, accelerating mold and dust-mite loading. We wrap repaired ducts with formaldehyde-free fiberglass insulation, sealed at every seam, to maintain air temperature from furnace to register. Insulation upgrades in Los Gatos typically add $180-$340 to a sealing job.

Trusted Brands We Service in Los Gatos

Our trucks stock parts from Rotobrush, Nikro, and Honeywell, the same brands serious HVAC contractors specify for California residential work. That means most Los Gatos repairs finish in a single visit. We’re not waiting on a parts run to San Jose. For the 95033 mountain homes with non-standard layouts, we carry Honeywell zone dampers and Aprilaire media filters that integrate with older systems without forcing a full replacement. If your ductwork needs a component we don’t have on the van, we’ll tell you before we start, not after we’ve opened everything up.

Common Duct Repair & Sealing Problems We See in Los Gatos Homes

• Mountain-zone flex ducts sag 6-8 inches from missing hangars. In Los Gatos’s 95033 hillside neighborhoods, these low points collect years of debris and moisture. Standard cleaning won’t reach them. We re-support the duct first, then seal.
• Valley-floor ranch homes have original galvanized ductwork with leaking joints. Homeowners in 95030 and 95032 often add attic insulation and wonder why rooms stay cold. The leak is at the joint, not in the R-value.
• Marine fog drives humidity into poorly sealed metal ducts. Los Gatos’s mountain-pass moisture differential causes condensation that San Jose flatlands don’t see. Mastic sealing and insulation upgrades stop the cycle.
• Wildfire particulate embeds in mountain-zone ductwork. Smoke from the 2020 CZU Lightning Complex settled in systems throughout 95033. Standard seasonal cleaning misses it. Camera inspection reveals the residue; targeted repair and sealing removes it.

Pricing for Duct Repair & Sealing in Los Gatos, CA

We Also Serve Cities Near Los Gatos

Our Duct Repair & Sealing team works throughout the South Bay, including Saratoga, Campbell, Communications Hill, and San Jose. Same standards, same upfront pricing, same live person answering the phone.

FAQs - Duct Repair & Sealing in Los Gatos