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 Miami
Duct sealing in Miami usually runs $850 to $1,800 for a whole-home job in a single-family house, and $450 to $1,200 for a condo unit depending on duct access and how much of the run is reachable. Most Miami homes need it because salt-laden sea air has been quietly eating the metal ductwork for years. If you’re noticing weak airflow, warm rooms, or a musty smell from your vents, call Hollis Air Duct Miami at (850) 660-3272. We work in Miami every week, from Brickell high-rises to 1950s Coral Gables ranches, and we’ll give you a written price before any work starts.
Why Hollis Air Duct Miami Is Miami’s Preferred Duct Sealing Company
We’re part of the Garrison Partners family, running every job by The Garrison Standard: arrive inside the quoted window, put the price in writing before we touch anything, complete the work by the book, and leave the site clean. Roy Castellanos leads our Miami location, and the standard he enforces is the same one that’s defined this business since 2004. We also offer our Dryer Vent Cleaning in Miami.
We know the buildings here. In Brickell and Edgewater high-rises, sealing ducts often means coordinating with building management and working through a closet ceiling access panel. In older Coral Gables and Coconut Grove homes, we’re usually dealing with original galvanized steel that’s been corroded by decades of salt air. Our technicians are background-checked and uniformed, and they document what they find with photos so you can see exactly what was sealed and why. Every job is covered by our Duct Sealing team’s 365-Day Done Right Promise: if the seal fails within a year, we return and make it right at no charge.
Styles & brands we work with
Duct Repair in Miami
Duct repair in Miami is rarely just about patching a hole. The salt air that rolls off Biscayne Bay and the Atlantic accelerates corrosion in metal ductwork, and we regularly find pinhole leaks in galvanized steel that inland homes wouldn’t develop for another decade or more. In a 1968 Coral Gables home, our techs camera-inspected the supply and return ducts and found the original galvanized steel so rusted from decades of salt air that the homeowner could see attic dust blowing through registers. We sealed every pinhole and joint with mastic and metal tape, then rebalanced airflow at the air handler, which cut the homeowner’s indoor allergy symptoms and dropped static pressure back within NADCA standards.
Repair work in Miami typically runs $350 to $900 for targeted fixes, rising if whole duct sections need replacement. We quote the full scope before work begins, not after we open the ceiling.
Rust and Corrosion Repair
Salt corrosion doesn’t stop once you find it. If we seal over rusted metal without removing the failed section first, the mastic peels off within months as the corrosion keeps working underneath. That’s a waste of your money. We cut out the rusted portion, fit a new section where needed, and seal the joints properly with UL 181-rated mastic.
Leak Detection and Airflow Testing
Not every duct problem announces itself. We find leaks with pressure testing and camera inspection, then measure static pressure at the air handler to confirm the system is moving air the way it should. In Miami’s humidity, a small leak in the wrong place can pull attic air into your supply ducts and push condensation where it should never be.
Air Duct Sealing in Miami
Air duct sealing in Miami is a rust-and-leak repair job as much as an efficiency upgrade. The sea breeze here carries salt particles that mix with duct dust and condensation, creating a corrosive paste that eats through metal from the inside. That’s why Miami homeowners see pinhole leaks three to five times faster than people in Orlando or inland Florida, and it’s why we treat every sealing job as a corrosion repair first.
Full duct sealing in a Miami home runs $850 to $1,800 for a house and $450 to $1,200 for a typical condo unit. The price covers cleaning the duct surface so mastic actually bonds, sealing every accessible joint and pinhole, and re-testing airflow at the registers. We use Duct Sealing in Miami methods that match the building: in high-rises we work within building access protocols, and in older homes we account for duct runs that may have been modified over the years.
Mastic and UL 181-Rated Sealing
We seal with UL 181-rated mastic, not cheap foil tape. In a humid Miami duct run, bargain tape adhesive fails from condensation and the tape falls off, reopening the leak. Mastic goes on wet, cures hard, and holds up to the moisture cycles that are constant here.
Whole-System Sealing for Miami Condos
Condo duct sealing is different from house work. Your unit’s ducts may only be reachable through a small closet ceiling, and the shared riser belongs to the building, not you. We seal what’s inside your unit and document what we find on the riser side so you can take it to your building manager with photos and measurements rather than just a complaint.
Trusted Brands We Service in Miami
Our equipment list includes professional-grade tools from Rotobrush for rotary brush cleaning, Nikro negative-air machines for containment during sealing work, and Guardsman filtration products when air quality is part of the job. We’re experienced with Lennox in Miami systems and others. These are the same tools commercial duct crews use, and we bring them to every Miami job, condo or house. We keep common sealing materials, mastic, and metal tape stocked locally so we aren’t waiting on a supplier when your job is scheduled.
Common Duct Sealing Problems We See in Miami Homes
- Salt-corroded galvanized ducts in 1950s-1970s homes: Original metal ductwork in Coral Gables, Coconut Grove, and Shenandoah has often rusted through in multiple places. The homeowner sees dust blowing from registers and can’t figure out why, until a camera shows the pinholes.
- Shared riser leaks in Brickell and Edgewater high-rises: We find units where the previous contractor sealed visible registers and called it done, never touching the riser connection. The leak and mold migration continue, and the homeowner paid for nothing.
- Sealant failure from humidity and condensation: Cheap foil tape or mastic applied over dirty, corroded metal fails within months in Miami’s humidity. The fix that holds is surface prep first: clean the metal, remove the rust, then seal.
- Attic duct pulls and disconnected joints: Miami attics get brutally hot, and older duct runs sag, pull apart at joints, or get crushed by stored boxes. We repair the mechanical separation before sealing, otherwise you’re sealing a gap that’s still partly open.
See the difference
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AfterPricing for Duct Sealing in Miami, FL
Expect to pay between $850 and $1,800 for whole-home duct sealing in Miami, or $450 to $1,200 for a condo unit. The spread depends on duct access, how many sections are corroded, and whether you’re in a single-family home where we can reach most of the run or a high-rise where access is limited to a closet ceiling. We don’t quote per-vent teaser prices that balloon once our van is at your building. The price is written before work starts and it does not move at the door. Call (850) 660-3272 for an exact quote. Estimates are free.
We Also Serve Cities Near Miami
Our crews run sealing jobs in Miami, plus Miami Beach, Key Biscayne, and Miami Gardens. If you’re in one of those areas and dealing with the same salt air and humidity, the service and pricing structure are the same: written quote, sealed before we leave, covered for a year.
Serving Miami, FL - Our Local Coverage Area
We’re based in the Miami 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
Yes. Salt particles from the Atlantic and Biscayne Bay settle inside duct runs, mix with condensation, and corrode galvanized steel from the inside out. In coastal Miami neighborhoods we see pinhole leaks in metal ductwork three to five times faster than in inland Florida cities. The only fix that holds is removing the rusted section and sealing the surrounding joints with UL 181 mastic. Call (850) 660-3272 for an assessment.
We can seal everything inside your unit without building approval. The shared riser itself belongs to the building, and we will document any leaks or mold we see on the riser side with photos and measurements so you can present it to your building manager. We do not touch shared infrastructure without written authorization from the building. Call us to discuss your specific building.
Sealing stops the leak, but the moldy smell usually comes from microbial growth that’s already inside the duct run or on the coil. Sealing alone won’t remove it. We recommend cleaning the contaminated surfaces first with a negative-air machine from Nikro, then sealing the leaks so humid attic air stops feeding the problem. Fogging without fixing the moisture source is money poured into a rusted riser. Call (850) 660-3272 to get our written recommendation for your home.
Sometimes, but you need to know the condition first. If the metal is rusted through in multiple places, patching individual holes is a short-term fix. We camera-inspect the accessible run and tell you honestly if sealing makes sense or if section replacement is the better use of your money. The written quote covers exactly what we’ll do, either way.
Every 2 to 3 years, especially if you live within a few miles of the coast. The salt load and moisture cycling in Miami breaks down sealant bonds faster than in dry climates, and a seal that was perfect two years ago may have developed small failures. We can re-inspect during a routine duct cleaning visit and touch up any failing seals at a fraction of the original cost. Call (850) 660-3272 to schedule.
Get a Written Quote for Duct Sealing in Miami
If your ducts are leaking, rusted, or just not moving air like they should, call Hollis Air Duct Miami at (850) 660-3272 for a free estimate. We’ll inspect your system, give you a written price, and complete the work by the book. Every job is covered by the 365-Day Done Right Promise, and the price you’re quoted is the price you’ll pay.
Written by Roy Castellanos, owner at Hollis Air Duct Miami, serving Miami and the surrounding area.