Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Rancho Palos Verdes
Duct sealing in Rancho Palos Verdes typically costs $800 – $2,400 for a whole-home seal, depending on system size and how much ground-movement damage we’re working around. Most jobs take a full day because we’re not just brushing mastic on joints; we’re repairing what the hillside has pulled apart. Call (361) 326-5060 for a free written estimate.
We’ve been driving out to the Palos Verdes Peninsula since 2004, and our crews know the difference between a standard seal job and a landslide-damage repair. Dispatch is coordinated from our Los Angeles office, but the technicians who show up at your door in Rancho Palos Verdes live and work in the South Bay. They know Portuguese Bend’s creeping ground, they know which hillside streets have the tightest access for our van, and they know that a ranch home off Crest Road needs a different approach than a custom build on the ocean side of Hawthorne Boulevard. That local knowledge matters because ductwork here fails in ways it doesn’t fail in Torrance or Lakewood.
Why Hollis Air Duct Cleaning Is Rancho Palos Verdes’s Preferred Duct Sealing Company
Our reputation in Rancho Palos Verdes was built on showing up inside the window and leaving the price where we wrote it. The Garrison Standard doesn’t bend for geography. When we schedule a duct sealing job in the Portuguese Bend or Abalone Cove areas, we build in extra time for access and for the structural assessment that these hillside homes require. We’re not the cheapest bid you’ll find, and we don’t try to be. We’re the bid that comes with a written 365-Day Done Right Promise and a free second visit if the seal fails within that year.
Calls from Rancho Palos Verdes are answered by a live person, 24 hours a day, 7 days a week. No voicemail loops, no callback queues. Our technicians are background-checked and uniformed; you know who’s walking into your home before they arrive. And every price is written down before any work starts. That’s The Garrison Code in action.
Duct Repair in Rancho Palos Verdes
Duct Repair in Rancho Palos Verdes means fixing what the ground has broken. The slow creep of the Peninsula’s landslide complex doesn’t just crack foundations; it racks the house frame, pulls sheet-metal seams apart, kinks flexible runs flat, and shears duct boots loose from the subfloor. A homeowner near Abalone Cove called us because the return side was pulling dust and marine-layer dampness into the hallway; our tech ran a camera inspection and found a flexible run pinched nearly flat where the slowly creeping ground had shifted the foundation, plus separated seams on the original 1960s sheet-metal trunk. We cut out the kinked flex, sealed the trunk and branch joints with mastic and mesh, reattached the sheared boot to the subfloor with proper strapping, and set the new MERV rating to match their Aprilaire filter cabinet – the living room static pressure dropped and the family stopped smelling the crawlspace.
Most Duct Repair jobs in Rancho Palos Verdes run $600 – $1,800. Simple boot reattachments and single-section flex replacement sit at the lower end. Full trunk rehabilitation with multiple seam repairs and custom fabrication for hillside access runs higher. We always inspect with a camera first so you’re not paying for guesswork.
When Repair Beats Replacement
Original 1950s – 1970s sheet-metal trunk-and-branch systems in Rancho Palos Verdes ranch homes are worth saving. The metal is heavier gauge than what gets installed today, and the layout is usually straightforward once we address the movement damage. We repair when the trunk is intact and the branches just need resealing and proper support strapping.
Access Challenges on Hillside Lots
Long, multi-directional duct runs on split-level and hillside homes mean some joints sit behind finished walls or in crawlspaces with 18-inch clearance. Our Nikro negative-air machines and Rotobrush rotary systems are sized for these tight spaces, and our technicians carry the tools to fabricate offset fittings on site rather than forcing a stock part where it doesn’t belong.
Air Duct Sealing in Rancho Palos Verdes
Air Duct Sealing in Rancho Palos Verdes is a movement-tolerant repair discipline, not a standard mastic-and-tape application. The marine layer rolls in most mornings, keeping sheet-metal runs cool and damp, which loosens foil tape and mastic while feeding mold at the joints. Meanwhile, ground creep from Portuguese Bend to the east-side canyons keeps pulling seams apart faster than any rigid sealant can hold. A proper seal here uses reinforced mastic with embedded mesh at stress points, flexible connections where the structure is still moving, and mechanical strapping that lets the ductwork shift without breaking the seal.
Whole-home Air Duct Sealing in Rancho Palos Verdes typically runs $800 – $2,400. A single-zone ranch with accessible crawlspace and minimal movement damage sits near the lower end. A multi-zone custom home with long hillside runs, multiple trunk separations, and contaminated flex that needs replacement before sealing can run toward the upper end. We price by the system, not by the vent, and the number we write down is the number you pay.
Sealing for Wildfire Ash and Contamination
Santa Ana wind events push ash and smoke from the Peninsula’s scrub-covered hills deep into duct systems. Sealing alone doesn’t remove what’s already inside; we typically pair sealing with a full rotary brush and negative-air cleaning when ash contamination is present. The seal prevents recontamination. Our Abatement Technologies HEPA filtration captures particulate down to 0.3 microns, and we match the filter cabinet to your existing Aprilaire or Guardsman setup.
Marine-Layer Moisture Control
Near-constant ocean humidity means condensation on cool metal runs, especially in homes with long trunks running through unconditioned crawlspaces. We seal with mold-resistant mastic and verify that insulation is intact and properly sealed at vapor barriers. A sealed, dry duct doesn’t grow mold. A sealed, damp one does.
Trusted Brands We Service in Rancho Palos Verdes
Our vans stock parts and materials from Rotobrush, Nikro, Abatement Technologies, Aprilaire, and Guardsman – the same professional-grade equipment commercial crews use, maintained to manufacturer spec and ready for Rancho Palos Verdes’s specific challenges. We carry Aprilaire filter cabinets and Guardsman media in common sizes so we’re not making a second trip to a supply house while your system sits open. For duct sealing, we use industrial-grade mastic and reinforced mesh from Abatement Technologies, not the hardware-store foil tape that fails in Peninsula humidity. That local parts availability means faster turnaround on every job, from a simple boot reseal on a Crest Road ranch to a full system rehabilitation in the Portuguese Bend slide zone.
Common Duct Sealing Problems We See in Rancho Palos Verdes Homes
- Ground creep pulling seams apart. The Portuguese Bend and east-side canyon landslide complexes shift houses on their foundations year after year. Metal duct seams that were tight in 2010 are gapped in 2025. Mastic alone won’t hold; we use mechanical strapping and flexible connections at stress points.
- Flex duct pinched flat by shifting foundations. Over-tight hillside framing and slowly moving footings crush flexible runs against joists or subflooring. No amount of register-level sealing fixes a duct that’s already collapsed. We replace the damaged section with proper support and slack for future movement.
- Marine-layer condensation loosening seals and feeding mold. Cool, damp Pacific air condenses on sheet-metal trunks running through unconditioned spaces. Foil tape peels. Mastic softens. Mold colonies establish at the joints. We seal with moisture-resistant products and verify insulation integrity.
- Wildfire ash infiltration through existing leaks. Dry Santa Ana winds push particulate from Peninsula brush zones into every gap in the duct envelope. Sealing after a contamination event requires cleaning first, then sealing with particulate-tight methods, then verifying with a pressure test.
Pricing for Duct Sealing in Rancho Palos Verdes, CA
A typical duct sealing job in Rancho Palos Verdes runs $800 – $2,400 for a whole-home system. Here’s how that breaks down:
| Scope | Price Range |
|---|---|
| Single-zone ranch, minimal movement damage, accessible crawlspace | $800 – $1,400 |
| Multi-zone home, moderate seam separation, some flex replacement | $1,400 – $2,000 |
| Custom hillside home, extensive movement damage, full trunk rehab | $2,000 – $2,400+ |
What moves the price: system size and zone count, amount of ground-movement damage requiring repair before sealing, accessibility (crawlspace height, finished basement, attic temperature), and whether contamination cleaning is needed first. We do not quote per-vent prices. We price by the complete system, agreed in writing before any work starts. The estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Rancho Palos Verdes
Our crews work the full South Bay and Harbor Area. If you’re in Lomita, Lakewood, Redondo Beach, or Torrance, the same technicians, the same equipment, and the same written guarantee apply. Every job is dispatched from our Los Angeles office and scheduled with the same discipline: arrive inside the window, price in writing, complete the job by The Garrison Standard. For Duct Sealing in Rancho Palos Verdes and surrounding communities, we’re available when you need us.
Serving Rancho Palos Verdes, CA - Our Local Coverage Area
We’re based in the Rancho Palos Verdes 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 About Duct Sealing in Rancho Palos Verdes
Every 5 – 7 years for a hillside home in Rancho Palos Verdes, or sooner if you notice uneven heating, musty odors after the marine layer rolls in, or dust blowing from registers. Ground creep here accelerates seal failure compared to inland homes, so we recommend a camera inspection every three years to catch movement damage before it becomes a major repair. Call (361) 326-5060 to schedule an inspection.
Yes, but we use movement-tolerant methods instead of rigid seals. Flexible connections at stress points, mechanical strapping with slack, and reinforced mastic with embedded mesh allow the ductwork to shift without breaking the seal. We also identify which joints are under active stress and may recommend more frequent monitoring. Call (361) 326-5060 and we’ll assess your specific situation.
The marine layer’s cool, damp air condenses on metal duct surfaces, especially in unconditioned crawlspaces and attics. That moisture feeds mold and dust mites at loose joints and failed seals. Sealing eliminates the moisture entry points, and we verify that insulation and vapor barriers are intact. If contamination is already present, we clean before sealing. Call (361) 326-5060 for a moisture and contamination assessment.
Duct sealing prevents ash and smoke particulate from entering your system during Santa Ana wind events, but it does not remove ash that’s already inside. We typically combine sealing with a full rotary brush and negative-air cleaning when wildfire contamination is present. The seal protects against recontamination. Call (361) 326-5060 to discuss whether your system needs cleaning before sealing.
A full visit includes camera inspection of all accessible ductwork, pressure testing to quantify leakage, repair of movement-damaged sections, sealing of all trunk and branch joints with reinforced mastic and mesh, reattachment of loose boots, verification of insulation integrity, and a final pressure test to confirm results. You receive before-and-after photos, a written report, and our 365-Day Done Right Promise. Call (361) 326-5060 to book your free estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Rancho Palos Verdes and the South Bay since 2004.