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 Miami Beach
Duct sealing in Miami Beach typically runs $800 – $2,400 for a whole-home system, with condo units in shared-rise buildings starting around $650 when the vertical chase is included in scope. Most jobs take one day, though oceanfront towers with corroded damper collars need extra prep. Call (361) 326-5060 for a written estimate before any work starts.
We’ve worked in Miami Beach since 2004, dispatching from our South Florida office to homes and condos from South Beach to North Beach. Our crews know the difference between a 1930s Mediterranean Revival with original plaster ductwork and a 1970s Collins Avenue high-rise where the vertical chase serves twelve units. That local knowledge matters because sealing ducts in Miami Beach isn’t like sealing them in Orlando or Atlanta. The salt air, the humidity, and the stacked multifamily construction create failure modes inland techs rarely encounter. When we quote a job in Miami Beach, we’re quoting for the actual building in front of us, not a generic square-footage formula.
Why Hollis Air Duct Cleaning Is Miami Beach’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning operates under The Garrison Standard, which means written prices, written guarantees, and a 365-Day Done Right Promise on every job. In Miami Beach, where many homeowners have already paid once for duct sealing that failed within a season, that written guarantee carries weight. We’re not the cheapest quote you’ll find, and we don’t try to be. We’re the quote you can hold in your hand.
Our technicians are background-checked and uniformed, and you know who’s arriving before they knock. Phones are answered by a live person 24 hours a day, 7 days a week, no voicemail loops. Scheduling and dispatch are coordinated from our Miami office, with crews serving Miami Beach locally. We’ve built our reputation in this market on showing up inside the quoted window, pricing in writing before touching anything, and leaving the site clean. That’s The Garrison Code, and it applies whether we’re working on a single-family home in Mid-Beach or a 20-story tower on Ocean Drive.
Roy Castellanos leads Hollis Air Duct Cleaning with a straightforward standard: the work gets done by the book, or we come back and make it right at no charge. That includes a free second visit if the repair fails within the year. No negotiation, no runaround.
Duct Repair in Miami Beach
Duct Repair in Miami Beach addresses the physical damage that salt corrosion, humidity, and age inflict on metal and fiberglass ductwork. We see pitted damper collars, separated flex-duct connections, and corroded fasteners in buildings from the 1950s motel-style garden apartments to the 1980s concrete towers. A typical duct repair in Miami Beach runs $450 – $1,200 depending on accessibility and the extent of corrosion damage. Condos in shared-rise buildings often fall in the higher end because the repair must account for cross-contamination between units.
Corroded Damper Collars and Fasteners
The chloride-laden air along Collins Avenue and Ocean Drive eats metal faster than almost anywhere else in Florida. We regularly find damper collars that look intact from the register side but are paper-thin behind the wall. Our techs test with a borescope before quoting, so you’re not paying for sealant that will flake off in six months.
Separated Flex Duct in Mid-Century Buildings
The 1950s and 1960s garden apartments between Alton Road and West Avenue often used fiberglass flex duct that has sagged, torn, or pulled loose at the collar. Repair means re-securing with mechanical fasteners, not just tape, then sealing with mastic rated for humid conditions. We use Guardsman-rated sealants for this work because standard duct tape fails quickly in Miami Beach’s year-round moisture.
Air Duct Sealing in Miami Beach
Air Duct Sealing in Miami Beach closes the leaks that let conditioned air escape into walls, attics, and shared vertical chases. In a typical Miami Beach home, we measure 20 – 35% air loss through leaks before sealing. After proper sealing with mastic and mechanical reinforcement, that drops to under 5%. A whole-house sealing job in Miami Beach generally costs $800 – $2,400; condo units in shared-rise buildings start around $650 when the chase is included. The price is written before work begins and does not move at the door.
Shared-Riser Sealing in Oceanfront Towers
This is where Miami Beach differs from every other market we serve. In the 1960s – 1980s towers along Collins Avenue, duct sealing is a shared-riser problem, not a single-unit one. The vertical chase serving stacked condos acts as a common mold reservoir, and the chloride-laden sea air corrodes the very dampers and fastener points you’re trying to seal. Sealing a single unit without isolating the chase simply pushes spores and treated air into the neighbors’ runs. Our Duct Sealing team maps the chase before quoting and sets negative-pressure containment with HEPA filtration when we work in these buildings.
Pre-Sealing Moisture Control
Sealing ducts while the condensate pan and evaporator coil are still wet traps moisture in the newly closed run. In Miami Beach’s tropical monsoon climate, that means mold growth within weeks. We inspect and dry the coil and pan first, or we document in writing why they need separate service before sealing proceeds. No exceptions.
Trusted Brands We Service in Miami Beach
We carry professional-grade equipment and stock parts for fast turnaround on Miami Beach jobs. Our rotary brush systems come from Rotobrush, negative-air machines from Nikro, and filtration products from Honeywell, Aprilaire, and Guardsman. For sealing work in coastal conditions, we specify Guardsman-rated sealants and Abatement Technologies HEPA containment because standard hardware-store products don’t hold up against salt spray and 70%+ humidity. When a Collins Avenue building manager calls with a chase breach affecting multiple units, we don’t wait two weeks for parts. Our Miami-area inventory covers the components that fail repeatedly in this environment.
Common Duct Sealing Problems We See in Miami Beach Homes
- Single-unit sealing without chase isolation. A homeowner in a South Beach tower has their registers sealed, but the unit keeps drawing damp, spore-laden air from the shared vertical chase. The musty smell returns within weeks. We see this after competitors treat the symptom, not the system.
- Sealant applied over salt-pitted metal. The coating looks fine at completion, but the underlying corrosion expands and flakes the sealant off before the next cooling season. Proper prep means grinding to sound metal or replacing the component.
- Sealing before mold remediation. The ducts are tight, but the wet coil and pan keep producing mold that now has nowhere to escape. The homeowner breathes concentrated spores. We dry or treat first, seal second.
- High-rise access without cross-contamination control. Agitation in one unit without negative pressure sends debris into the chase and down into the unit below. Our Nikro negative-air machines maintain containment throughout the job.
Pricing for Duct Sealing in Miami Beach, FL
Whole-home duct sealing in Miami Beach runs $800 – $2,400. Condo units in shared-rise buildings start around $650 when the vertical chase is included in scope; isolated single-unit sealing without chase work runs $450 – $900 but often fails within a year in oceanfront buildings. What moves the price: accessibility (crawlspace vs. high-rise with freight elevator), extent of salt corrosion requiring component replacement, whether the chase needs isolation and HEPA containment, and if coil/pan drying or mold treatment must precede sealing.
We price per system, not per vent. One flat price per system, agreed in writing before we start. No per-vent add-ons, no equipment fees that appear at the door. Every Miami Beach estimate includes a camera inspection, a written scope of work, and a sealant map you’ll receive at completion. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Miami Beach
Our crews work throughout the metro area, including Miami Beach and nearby Miami, Key Biscayne, Coral Gables, and Hialeah. Scheduling and dispatch are coordinated from our Miami office, with local crews serving each area. The same written pricing, background-checked uniformed technicians, and 365-Day Done Right Promise apply in every city we cover.
Serving Miami Beach, FL - Our Local Coverage Area
We’re based in the Miami Beach 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 Miami Beach
Because in most Collins Avenue and oceanfront towers, your ducts share a vertical chase with the units above and below you. Sealing one unit without isolating the chase just pressurizes the leak path and pushes spores and untreated air into your neighbors’ runs, and vice versa. The chase itself needs to be mapped, contained under negative pressure, and sealed at the breach points. Call (361) 326-5060 and we’ll inspect the chase scope before quoting.
Yes, if the wrong products and prep are used. Standard duct tape and hardware-store mastic fail within a season here. We use Guardsman-rated sealants applied to properly prepped metal, or we replace corroded components rather than seal over them. With correct materials and prep, a duct seal in Miami Beach lasts as long as inland, but the upfront work costs more because the prep is more extensive. We document the materials used on every job.
Yes, in most cases. We access through the existing registers and returns, using rotary brush systems and borescope-guided sealant application. The chase is isolated with inflatable bladders and maintained under negative pressure with Nikro HEPA filtration so work in one unit doesn’t contaminate others. Full chase demolition is rare and only needed when the ductwork itself has collapsed or is structurally compromised.
You should receive three things: pre- and post-sealing camera footage showing the condition inside your ducts, a written sealant map marking every location where sealant was applied, and your invoice with the 365-Day Done Right Promise noted. In Miami Beach’s high-rise market, where resale and association documentation matter, we also provide a scope-of-work summary suitable for building management records. If a company won’t show you what they did, they didn’t do it properly.
Yes. Recurring musty smell usually means an active moisture source, not just residual debris. We inspect the coil, pan, and chase for standing water or mold growth before sealing anything. Sealing over an active source traps the problem and makes it worse. In Miami Beach’s climate, we often find that the real issue is a corroded condensate drain or a chase breach feeding spores from another unit. We fix the source, then seal. Call (361) 326-5060 for an inspection.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Miami Beach since 2004.