Fast, Reliable Duct Repair & Sealing Across Ben Lomond
Most duct repair calls we get from Ben Lomond aren’t about normal wear. They’re about crushed flex ducts, failed seals in fog-damp crawl spaces, and rodent damage that flatland HVAC crews rarely see. If your cabin on Glen Arbor Road or Love Creek Road is pushing musty air, losing heat through the floor, or running the furnace twice as long as it should, the problem is usually in the ductwork under the house. We answer calls from Ben Lomond homeowners 24 hours a day, and most repairs are completed in a single visit. Call (855) 401-6006 for upfront pricing and a free estimate.
Why Bellows Air Duct & Vent Co. of California Is Ben Lomond’s Preferred Duct Repair & Sealing Company
We’ve worked the 95005 ZIP for over 42 years, and our crews know the difference between a Scotts Valley tract home and a 1940s Ben Lomond cabin with flex duct threaded through a dirt-floored crawl space. That matters because the repair approach is completely different.
Ben Lomond customers call us back because we show them the problem before we quote the fix. Every job starts with a camera inspection of the ductwork, and we review the footage with you on site. No guessing, no “trust us” repairs.
Our 90-Day Done Right Promise applies to every Ben Lomond job. If the seal fails or the repair doesn’t hold, we return at no charge. No paperwork to file, no arguing about coverage.
Calls are answered by a live person, 24/7, not an app or voicemail tree. Most Ben Lomond appointments are scheduled within 24 hours, and our technicians arrive in uniform with background checks on file.
Our Duct Repair & Sealing Services in Ben Lomond
Duct Sealing
Air leaks in Ben Lomond ductwork typically aren’t from punctures. They’re from original duct tape that dried and lifted in the canyon’s persistent humidity, or from mastic that cracked after years of fog-driven moisture cycling. Our Duct Repair & Sealing team removes the failed material, cleans the joint surfaces, and reseals with high-grade mastic or mechanical fasteners rated for wet crawl-space conditions. A typical duct sealing job in Ben Lomond runs $450-$850 for a single-system home, depending on access and how many joints have failed.
Flex Duct Repair
This is the service we perform most often in Ben Lomond. The 1930s-1960s cabins that dominate the local housing stock were never designed for forced air. Flex duct was retrofitted through damp, uninsulated crawl spaces that sit inches above the forest floor. Raccoons crush it. Rodents nest in it. Moisture degrades the insulation jacket. On a 1950s cabin conversion on Glen Arbor Road, our crew found a 20-foot flex duct run under the crawl space nearly flattened by raccoon traffic, and the mastic seals had failed from years of moisture cycling. We replaced the crushed section with new insulated flex duct and re-sealed all joints with high-grade mastic, restoring airflow to the living room register. Flex duct repair in Ben Lomond typically costs $280-$620 per run, including materials and labor.
Metal Duct Repair
Some older Ben Lomond homes still have original galvanized metal ductwork from gravity furnace systems. We can repair separated seams, patch corrosion holes, and reinforce sagging sections. When the metal is too far gone, we’ll tell you straight and quote replacement with modern insulated flex or sheet metal. Metal duct repair in Ben Lomond generally runs $180-$340 for spot repairs, $1,200-$2,400 for full replacement of a single trunk line.
Duct Insulation
Uninsulated duct runs in Ben Lomond crawl spaces lose 20-30% of their conditioned air to the surrounding damp air, and they sweat. Condensation on cold duct surfaces feeds mold growth and drips onto subflooring. We wrap accessible ductwork with formaldehyde-free insulation and vapor barrier, sealed at all seams. Duct insulation in Ben Lomond costs $3.50-$5.50 per linear foot, with most single-system homes falling in the $650-$1,400 range.
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 Ben Lomond
We carry repair materials from Abatement Technologies and Aprilaire, the same brands serious HVAC contractors specify for coastal California conditions. Our trucks stock insulated flex duct, high-tack mastic, and mechanical sealants sized for the damp crawl-space environments common in Ben Lomond’s older housing stock. That means most repairs don’t wait on parts. We also use Rotobrush equipment for pre- and post-repair camera verification, so you see the condition of your ductwork before we start and after we finish.
Common Duct Repair & Sealing Problems We See in Ben Lomond Homes
- Crushed flex ducts from raccoon traffic. In Ben Lomond’s redwood canyon, duct repair & sealing jobs routinely uncover crushed flex ducts from raccoons and nesting material packed with redwood duff and insulation strips, a contamination profile almost never seen just 15 miles away in Scotts Valley or Santa Cruz proper. The forest-floor crawl spaces under converted cabins are accessible to wildlife in ways that slab-on-grade construction simply isn’t.
- Mastic seals failing from moisture cycling. The San Lorenzo Valley receives 50-60 inches of annual rainfall and is regularly blanketed by coastal fog pushing inland through the mountain gap. That sustained humidity causes mastic to crack and separate from metal collars, especially in uninsulated crawl spaces where temperature swings are sharpest.
- Original duct tape drying and lifting. Cheap foil tape or fabric duct tape applied decades ago has long since lost adhesion. We find it hanging in strips, leaving gaps that pull unconditioned crawl-space air directly into the supply stream. Your furnace runs longer. Your bills climb. The fix is proper mechanical sealing, not more tape.
- Smoke particulate from the 2020 CZU Lightning Complex fires. Many surviving structures in the 95005 ZIP drew smoke and fine ash through their HVAC systems for days, leaving combustion particulate embedded in ductwork that standard seasonal cleaning doesn’t address. Sealing alone won’t fix this; we assess whether duct replacement is the honest recommendation.
Pricing for Duct Repair & Sealing in Ben Lomond, CA
We don’t do bait coupons or surprise add-ons. The price we quote is the price on the invoice.
| Service | Typical Range in Ben Lomond |
|---|---|
| Duct sealing (single system) | $450 - $850 |
| Flex duct repair (per run) | $280 - $620 |
| Metal duct spot repair | $180 - $340 |
| Metal duct replacement (trunk line) | $1,200 - $2,400 |
| Duct insulation | $650 - $1,400 |
| Mastic sealant application (joints only) | $320 - $580 |
Factors that move the number: crawl-space access (tight spaces take longer), extent of rodent damage requiring contamination cleanup, and whether the HVAC system needs to be shut down during peak heating or cooling season. We offer $50 off any repair over $250, a free second opinion on any written estimate, and a permanent 5% senior and veteran discount. Estimates are free. Call (855) 401-6006 for an exact quote.
We Also Serve Cities Near Ben Lomond
Our Duct Repair & Sealing in Ben Lomond crews also respond to calls from Scotts Valley, Santa Cruz, Soquel, and Los Gatos. The canyon geography of Ben Lomond creates unique duct problems that flatter coastal communities rarely see, but our technicians are routed throughout Santa Cruz County and the San Lorenzo Valley daily.
Serving Ben Lomond, CA - Our Local Coverage Area
We’re based in the Ben Lomond 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 Ben Lomond
Because the source is usually a breached flex duct in your crawl space, not surface dust inside the house. In Ben Lomond, raccoons and rodents regularly enter forest-floor crawl spaces and pack nesting material into duct runs. Standard duct cleaning removes debris from the interior but doesn’t seal the entry point or repair the crushed section. We camera-inspect the full system, repair or replace damaged flex duct, and seal all joints so the debris stops getting in. Call (855) 401-6006 for a free inspection.
We can often repair separated seams, patch small corrosion holes, and reinforce sagging sections in original galvanized metal ductwork. If the metal is extensively corroded or the original design can’t support modern airflow requirements, we’ll quote replacement and explain why. We’ve repaired 1940s metal ducts on Love Creek Road cabins and replaced them on Glen Arbor Road when the honest call was that repair wouldn’t last. A free camera inspection gives you the real condition.
Yes, if the smell is coming from your HVAC system. Musty odors in Ben Lomond homes are typically caused by mold growing on dust and moisture inside leaky ductwork, especially in uninsulated crawl-space runs where fog-driven humidity condenses on cold metal. Sealing the leaks stops the moisture infiltration and prevents the HVAC from pulling crawl-space air into your living space. If mold is already established, we may recommend duct cleaning or replacement of heavily contaminated sections before sealing. Call for an assessment.
They don’t enter the duct interior directly. They enter the crawl space through foundation vents, gaps in skirting, or access doors left unsecured, then walk on or nest against flex duct runs. Their weight crushes the thin-walled flex, and their nesting material - packed with redwood duff, insulation strips, and organic debris - blocks airflow and contaminates the system. The fix is repairing the crushed duct, sealing the crawl space where accessible, and replacing damaged insulation. We see this on Ben Lomond jobs far more often than in nearby Scotts Valley or Santa Cruz.
Sometimes, but only if the existing duct layout can support forced-air airflow. Gravity systems used larger, unsealed ducts designed for natural convection. Retrofitting requires assessing whether the trunk lines can handle the static pressure of a modern furnace or heat pump, and whether the branch runs are properly sized and sealed. We’ve done successful retrofits on Ben Lomond cabins where the original metal duct was in good condition. We’ve also advised homeowners when full replacement was the only honest path. A free evaluation lets us give you a real answer for your specific system.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co., serving Ben Lomond since 1984.