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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After
Before
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Before
AfterFast, Reliable Duct Sealing Across Cherryland
Duct sealing in Cherryland typically costs $400 – $900 for a whole-house seal on pre-1970s homes, and most jobs are scheduled within a few days of your call. We serve Cherryland from our San Francisco Bay Area dispatch office, and our crews know the area’s original worker housing stock well enough to spot the crushed galvanized runs and retrofitted disconnects before we unload the van. If you’re west of Mission Blvd or anywhere in Cherryland’s older tracts, call (361) 326-5060 for a free estimate with a written price that won’t move once we’re inside.
Why Hollis Air Duct Cleaning Is Cherryland’s Preferred Duct Sealing Company
We’ve been working in Cherryland long enough to know what the original 4-inch galvanized ducts look like after seventy years of retrofitted wall heaters and window A/C units. Our Duct Sealing team treats every home west of Mission Blvd with the same protocol: camera inspection first, then a written scope before any mastic touches metal.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window. That’s The Garrison Standard, and it’s how every Hollis location operates, including ours serving Cherryland. When we quote duct sealing, the price is written down before work starts. No estimates that balloon once the technician is inside.
Calls are answered by a live person, 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule.
Every repair is covered by our 365-Day Done Right Promise. If the work fails within a year, we return and make it right at no charge, including a free second visit. That’s backed in writing on every job, not something we negotiate after the fact.
Duct Sealing Services in Cherryland
Duct Sealing Services in Cherryland focus on closing the gaps, cracks, and failed joints that let conditioned air escape into your attic or crawlspace. In a town where most housing was built between the 1940s and 1960s for cannery and nursery workers, the original sheet-metal ductwork was never designed for modern HVAC loads, and decades of retrofits have left many runs disconnected or crushed. We use duct sealing mastic, reinforced mesh, and mechanical fasteners to restore pressure integrity. A typical whole-house duct sealing job in Cherryland runs $400 – $900, depending on accessibility and how many runs need attention.
Leak Detection and Pressure Testing
We start with a visual camera inspection and, where needed, a pressure test to quantify how much air you’re losing to the attic or crawlspace. In Cherryland’s 140°F summer attics, even a 15% leak rate forces your system to run hours longer to cool the same space. We show you the footage before we quote the seal.
Mastic Sealing of Joints and Registers
Our crews apply professional-grade mastic to every accessible joint, boot, and register connection. Unlike tape, which dries and fails in attic heat, mastic remains flexible and is rated for the temperature swings Cherryland ducts see year-round.
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.
Duct Insulation in Cherryland
Duct Insulation in Cherryland addresses the uninsulated sheet-metal and early flex duct systems that dominate local housing stock. Original ducts from the 1950s and 1960s were installed with no wrapping at all, meaning 140°F attic air bakes the supply lines all summer while winter chill bleeds heat into unconditioned space. We install formaldehyde-free duct wrap with a vapor barrier, secured and sealed at every seam. A typical Cherryland attic insulation wrap for existing duct runs runs $300 – $700, with crawlspace work adding $200 – $500 depending on access conditions.
Attic Duct Wrapping for Summer Heat
Cherryland’s summer attic temperatures routinely exceed 140°F. Uninsulated supply ducts in that environment deliver air 10 – 15 degrees warmer than it left the coil. Our wrap with sealed vapor barrier reduces that gain and takes load off your compressor.
Crawlspace Duct Protection
Where ducts run through Cherryland’s shallow crawlspaces, inches above damp soil from the high water table, insulation with a proper vapor barrier slows condensation and reduces the rust cycle that eats through metal joints. We inspect for corrosion before we wrap; sealing rusted metal without treating it first wastes your money.
Trusted Brands We Service in Cherryland
We carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies on every Cherryland job, and we stock filtration and sealing products from Honeywell, Aprilaire, and Guardsman. That means no waiting on parts for standard repairs. When we find a failed connection in a home off Cherryland Avenue or along Mission Blvd, we can usually complete the seal same visit rather than scheduling a return trip once materials arrive.
Common Duct Sealing Problems We See in Cherryland Homes
- Crushed galvanized runs west of Mission Blvd. Original 4-inch round ducts from the 1950s and 1960s were never meant to survive wall-heater retrofits. We regularly find them flattened under newer equipment, choking airflow to back bedrooms.
- Disconnected floor registers from ad-hoc A/C installs. Window unit upgrades and amateur HVAC additions often leave original register boots hanging open, pulling attic dust straight into living rooms every time the blower cycles.
- Rusted crawlspace joints from the high water table. Cherryland’s shallow crawlspaces hold moisture year-round. Galvanized steel corrodes at the seams, and once rust opens a gap, mastic alone won’t hold until the metal is treated or replaced.
- Sealant failure in uninsulated attic ducts. Standard duct tape dries and releases in 140°F attic heat. We remove failed tape and apply high-temp mastic rated for the thermal stress Cherryland attics create.
Pricing for Duct Sealing in Cherryland, CA
Whole-house duct sealing in Cherryland typically runs $400 – $900. Duct insulation for attic runs adds $300 – $700, and crawlspace insulation runs $200 – $500. What moves the number: how many runs are accessible, whether we need to treat rust before sealing, and if crushed or disconnected sections require repair or replacement rather than simple sealing.
We give one flat price per system, agreed in writing before any work starts. No per-vent pricing, no add-ons at the door. You’ll see before-and-after photos of your own ducts, and you’ll know exactly what was sealed and why. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Cherryland
Our crews travel throughout the Bay Area and beyond. If you’re outside Cherryland, we also provide Duct Sealing in Cherryland and surrounding communities including Los Angeles, San Diego, San Jose, and San Francisco. Dispatch and scheduling are coordinated from our San Francisco Bay Area office.
Serving Cherryland, CA - Our Local Coverage Area
We’re based in the Cherryland 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 Cherryland
Because in the pre-1970s tracts west of Mission Blvd, original 4-inch galvanized ducts are routinely crushed or disconnected at floor registers after decades of wall-heater and window A/C retrofits. Once our Rotobrush camera reveals the damage, sealing the failed joints becomes necessary before cleaning has any lasting benefit. We stop and show you the footage, then quote the repair in writing before proceeding. Call (361) 326-5060 for an exact quote; estimates are free.
It closes the gaps where conditioned air escapes into the attic or crawlspace, and where unfiltered attic dust gets pulled into your living room. In a typical Cherryland ranch, we find disconnected register boots, open plenum seams, and crushed supply lines that have been leaking for decades. Sealing restores pressure, reduces dust, and lets your system reach the thermostat setpoint without running all afternoon.
We inspect every crawlspace run with a camera before quoting. Light surface rust gets treated with a rust converter, then sealed and wrapped. Severely corroded sections are cut out and replaced with new galvanized or flex duct, then sealed to the existing system. Mastic applied over active rust will fail within a season; we don’t do patch jobs that won’t last.
Yes. Our source removal protocol uses Rotobrush rotary brush systems and Nikro negative-air machines per NADCA guidelines, and our sealing work addresses the accessible leaks the cleaning reveals. We document before-and-after conditions with photos, and we won’t seal ducts that should be replaced instead.
Sealing alone won’t stop heat gain through uninsulated metal, but it stops the conditioned air from escaping before it reaches your rooms. For full summer performance, we usually pair sealing with duct insulation to block radiant attic heat. The combination typically drops supply air temperature by 10 – 15 degrees and reduces system runtime significantly.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Cherryland and the Bay Area since 2004.