Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Fast, Reliable Duct Sealing Across Westchester
Duct sealing in Westchester typically costs between $450 and $1,200 for a single-story concrete-block home, depending on how much of the original 1950s-70s ductwork needs mastic, mechanical fasteners, or full section replacement. We respond to service calls across Westchester from our Miami office, and our crews know the low-clearance attics and slab-embedded ducts that make this neighborhood’s homes different from anything else in South Florida. If your AC runs constantly and the registers still feel weak, the ductwork is the first place we look. Call (850) 660-3272 and we’ll schedule an inspection, quote a written price, and do the sealing by the book.
Why Hollis Air Duct Miami Is Westchester’s Preferred Duct Sealing Company
Westchester homeowners call us because the work here is unlike duct sealing anywhere else in Miami-Dade. The houses are mostly single-story, concrete-block builds from the Eisenhower and Kennedy years, with shallow attics and original duct runs that have been baking in Florida humidity for six decades. Our techs arrive inside the quoted window, in uniform, with a written price before any work starts. No price moves at the door, and no one invents a problem you don’t have.
The 365-Day Done Right Promise matters in Westchester specifically because salt air from Biscayne Bay and the summer storm cycle cause sealed joints to fail in ways a one-time shop won’t see coming. If a sealed joint opens within a year, we return and make it right at no charge, including the free second visit. Roy Castellanos leads the crew, and the Garrison Code governs how every tech behaves on your property: arrive on time, price it in writing, do the job right, leave the site clean.
Phones are answered by a live person 24/7. When a Westchester homeowner calls at 7 a.m. because the AC just kicked on and the bedroom smells like wet drywall, a human picks up. That’s the standard.
Styles & brands we work with
Air Duct Sealing in Westchester
Air Duct Sealing in Westchester is work that restores the pressure and airflow in ducts that were installed when this neighborhood was first built, usually between the late 1950s and early 1970s. The job involves locating every separated joint, crushed flex run, and loose connection, then sealing them with mastic and mechanical fasteners, not cheap foil tape. A full seal on a typical Westchester three-bedroom runs $450 to $1,200. You need it when rooms at the end of the trunk line never cool down, when the blower runs constantly, or when you smell musty air after a storm.
Mastic Sealing on Original Ductwork
Mastic is a brush-on sealant that hardens into a flexible, airtight bond. On Westchester’s original board-and-batten ductwork, mastic is the only sealant that survives the humidity cycle. Foil tape lifts within a season.
Slab Duct Repair and Water Intrusion
Some Westchester homes still have ‘gravity feed’ duct trunks embedded in the slab. When stormwater fills those channels, the ducts leak conditioned air into the ground and pump musty odor into the house. We trace that problem to the slab, not the attic.
Duct Sealing Services in Westchester
Duct Sealing Services in Westchester cover both the attic runs and the slab-embedded sections, because sealing only half the system means the other half still leaks. We inspect every accessible run with a camera, test static pressure, then seal what’s leaking. A basic attic-only seal starts around $450. A full-system seal with slab duct repair in an original 1960s home can run up to $1,200. We give you that price in writing before any technician touches a duct.
Supply and Return Duct Sealing
Supply ducts push conditioned air to the rooms. Return ducts pull warm air back to the handler. Sealing both restores negative pressure and stops the blower from cycling on and off every few minutes.
Register Boot and Plenum Sealing
The boot is the metal box behind each floor or wall register. The plenum is where the main trunk meets the coil. Leaks at these points dump air into the attic or wall cavity, and they account for a large share of the weak airflow we find in Westchester.
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 Westchester
We seal ductwork on systems from every major manufacturer, and we stock sealing materials and filtration components that match the equipment already in Westchester homes. That includes Honeywell and Aprilaire filtration housings, Guardsman antimicrobial coatings for duct interiors, and Abatement Technologies negative-air machines when the job calls for HEPA filtration during aggressive cleaning. We do not use hardware-store foil tape on joints that need to survive salt air and summer humidity. The materials we use are chosen for how they perform in a coastal Miami-Dade attic, not just what the distributor had on the shelf. Westchester customers get parts and materials matched to their system on the first visit.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Westchester Homes
- Rusted metal duct joints from salt air and humidity. Bare metal collars corrode over 60 years, and the joints reopen within a season if they’re sealed with cheap foil tape instead of mastic and mechanical fasteners.
- Slab-embedded ‘gravity feed’ trunks that flood during heavy rain. These original concrete channels crack and let groundwater in, so air leaks into the ground and musty odor pushes into the living space.
- Crushed flex ducts in low-clearance attics. Shallow attics force installers to bend flex runs tighter than the duct can handle, and years of heat plus gravity kink them shut.
- Board-and-batten joints that separate after decades of expansion. The original wood and metal duct construction dries, warps, and opens at the seams, especially near the eaves where humidity sits the longest.
Pricing for Duct Sealing in Westchester, FL
A typical duct sealing job in Westchester runs $450 to $1,200 for a single-story home. The low end covers sealing accessible attic runs with mastic. The high end covers older homes with original board-and-batten ducts, multiple separated joints, or slab-embedded trunk repair. Homes in the Country Club Estates and surrounding streets south of Coral Way tend to fall in the middle of that range, but it depends on the condition of the original ductwork, not the zip code. The price is written down before work starts and it does not move at the door. Call (850) 660-3272 for a free estimate with exact numbers for your home.
We Also Serve Cities Near Westchester
Hollis Air Duct Miami serves Westchester and the surrounding communities including Miami, Miami Beach, Miami Gardens, and Doral. If you’re in a neighboring city, our Duct Sealing team covers the same standard: written pricing, uniformed techs, and the 365-Day Done Right Promise in writing.
Serving Westchester, FL - Our Local Coverage Area
We’re based in the Westchester 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 Westchester
The smell usually comes from the slab-embedded ‘gravity feed’ duct trunk, not the attic. Many original Westchester homes built in the 1950s and 60s have duct channels poured into the concrete slab, and during heavy summer thunderstorms those channels fill with groundwater. The water sits in the duct trunk, grows mold and bacteria, and pushes musty air through the registers every time the blower runs. An attic-only inspection misses it entirely. Call (850) 660-3272 and we’ll camera the slab ducts specifically.
Antimicrobial fogging is rarely worth the money as a standalone upsell. A fogger sprays a mist into the duct system, but if the ducts are leaking, the fog escapes through the same holes that leak air. A real duct sealing job addresses the source: we remove contaminated material with HEPA filtration, seal the leaks, and only then apply a Guardsman antimicrobial coating where moisture has caused visible microbial growth. Fogging alone is a short-term masking job. Sealing plus cleaning is the fix.
Every two to three years is a reasonable interval for a Westchester concrete-block home, especially one within a few miles of Biscayne Bay. Salt air accelerates corrosion on metal duct joints, and the summer storm cycle stresses original board-and-batten seams. If you’re smelling musty air after rain, hearing the blower cycle on and off frequently, or seeing rooms that never reach the thermostat setpoint, schedule an inspection sooner. The inspection is free, and the written quote is yours whether or not you book the work.
Board-and-batten ducts can be sealed if the wood and metal structure is still sound. We seal separated joints with mastic and mechanical fasteners, then reinforce the seams. If sections have collapsed, rusted through, or been crushed by years of attic traffic, those sections are replaced. We show you camera footage of what we found before recommending replacement, and the written price includes only the work that’s actually needed. No duct replacement gets sold without visual proof.
Weak airflow is almost always a leak problem, not a dirty vent problem. The blower pushes air into a duct system that leaks through separated joints, rusted collars, crushed flex runs, or slab-embedded trunks. The air you feel at the register is only the fraction that survived the trip. Cleaning the vent cover does not seal a single leak. Our crew tests static pressure and cameras the ducts to find where the air is going. Call (850) 660-3272 for a free estimate and a written answer to where your air is going.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Westchester with duct sealing, air duct cleaning, and dryer vent cleaning since 2004.