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 Palmetto Bay
Duct sealing in Palmetto Bay typically runs $450 to $1,400 for a full system on a single-family home, depending on how many leaks we find and how much of the run needs mastic work. Most jobs finish in one day. If your ducts are original to a 1960s or 1970s ranch, you’re almost certainly losing conditioned air into the attic right now. Call (850) 660-3272 and we’ll put a written price in front of you before any work starts.
We know this village. We work in Old Cutler, in the neighborhoods off Ludlam Road, and in every pocket of Palmetto Bay where 40-year-old ducts are still pushing air through rusted seams. The humidity here averages 73%. The salt rides in off Biscayne Bay. The oaks and pines dump pollen into your returns. That combination does not forgive old ductwork. Our job is to find the leaks and close them so the air you paid to cool actually reaches the rooms you live in.
Why Hollis Air Duct Miami Is Palmetto Bay’s Preferred Duct Sealing Company
Palmetto Bay homeowners call us because we write the price down before we touch a register. That’s the Garrison Standard, and it applies to every job we run in this village. No estimate that balloons once the technician is in the attic. No per-vent upcharge games. You get one number for the whole system, written on paper, before work begins.
Roy Castellanos leads our crews, and the people we send into your home are background-checked and uniformed. You’ll know who’s walking in your door. They arrive inside the quoted window, they work by the book, and they leave the site clean. If a seal fails within 365 days, we come back at no charge. That’s not a vague promise. It’s the 365-Day Done Right Promise, and it’s backed in writing on every Palmetto Bay job.
Our technicians know what to look for in this specific housing stock. Ranch and split-level homes built from the 1960s through the 1980s dominate Palmetto Bay. The flexible ducts in those hot attics break down differently than the rigid metal you see in newer construction. We’ve pulled crushed flex, disconnected collars, and rusted seams out of homes all over this village. That local knowledge is why our Duct Sealing work in Palmetto Bay holds up.
Styles & brands we work with
Duct Sealing Services in Palmetto Bay
Duct Sealing Services in Palmetto Bay involve finding every air leak in your duct system and closing it with mastic sealant, the same material commercial crews use on high-rise projects in downtown Miami. We do not use foil tape on seams. Foil tape fails within two summers in Palmetto Bay’s salt-laden air. Mastic is a paste that dries hard, flexes with temperature swings, and actually bonds to the metal. It stays sealed.
Supply and Return Run Sealing
Your supply ducts push cooled air from the air handler to your rooms. Your return ducts pull room air back to the unit. Both need to be sealed, because a leak on either side costs you money. In Palmetto Bay, we regularly find return ducts pulling in attic air that measures 120 degrees in August. That hot, humid air gets mixed with your cooled air, so your system runs longer to hit the thermostat setting. We seal both sides with mastic, and we test the difference in airflow before and after.
Register and Boot Sealing
The metal boot that connects your duct to the ceiling register is a common failure point in older Palmetto Bay homes. Vibration loosens the connection, gaps open up, and you lose conditioned air into the void between floors. On a mid-century ranch, we’ll pop the register, examine the boot with a camera, and seal the gap where it meets the drywall. That’s often where the air loss is worst, and it’s a fix most homeowners never see because it’s hidden behind the grille.
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 Palmetto Bay
Duct Insulation in Palmetto Bay is the layer of protection that keeps hot, humid attic air from condensing on the outside of your ducts. Original fiberglass insulation from the 1960s and 1970s breaks down in south Florida attics. It gets thin, it gets waterlogged, and it stops doing its job. When that happens, condensation forms inside the duct run, and you get water drips through ceiling registers and onto your floors. We replace failed insulation with new material that’s rated for our coastal climate.
Fiberglass Duct Wrap Replacement
When we open an attic in Palmetto Bay and find insulation that’s been flattened by decades of heat, we don’t just look at it. We replace it. New fiberglass duct wrap goes on at the correct thickness, with the vapor barrier facing outward. That barrier is what stops moisture from moving through the insulation to the duct wall. Without it, the problem comes back. With it, the ducts stay dry and the air stays cool.
Condensation Control
The dark ring you see around a ceiling register after heavy rain is condensation inside the duct run, plain and simple. Sealing alone won’t always fix that. If the insulation is compromised, the duct surface stays cold enough for moisture to form no matter how tight the seams are. In Palmetto Bay, where thunderstorms roll through almost every afternoon from June through September, condensation control is not optional. It’s basic survival for your ceiling and your air quality.
Trusted Brands We Service in Palmetto Bay
Our Palmetto Bay trucks carry equipment and parts from Rotobrush, Nikro, Abatement Technologies, and Guardsman. We don’t show up with hardware-store gear and hope for the best. The negative-air machines we use are the same class of equipment commercial crews run on medical buildings. For filtration, we work with Honeywell and Aprilaire products regularly. If a filter housing or media cabinet needs replacing during a duct sealing job, we have what we need on the truck for most Palmetto Bay homes. Fast turnaround, no second trip required.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Palmetto Bay Homes
- Salt corrosion at duct seams. The air moving through your attic carries salt from Biscayne Bay. That salt settles on metal seams and eats through them in five to seven years. Pinhole leaks form. They’re invisible from the outside. By the time a blower motor burns out from working too hard, the seams have been leaking for seasons.
- Crushed flexible ducts in hot attics. Ranch and split-level homes in Palmetto Bay have attic spaces that bake in the summer. Flexible ducts installed in the 1970s and 1980s soften in that heat and collapse under their own weight. We find crushed flex on roughly half the older homes we open up for the first time.
- The Palmetto Bay mold line. A dark ring forming where attic ducts meet ceiling registers. It appears after a heavy rain season. It means condensation is pooling inside the duct run, not just surface dirt. Sealing has to address the moisture source, and that usually involves insulation work as well.
- Pollen-clogged returns. Oak and pine pollen coats duct interiors here. It builds up, clogs registers, and forces air through any gap it can find. Poorly sealed ducts then suck in more humid outdoor air, which layers mold on top of the pollen. It’s a compounding failure, and it starts with leaks.
Pricing for Duct Sealing in Palmetto Bay, FL
Full-home duct sealing in Palmetto Bay runs $450 to $1,400 on most single-family homes. A smaller ranch with good attic access lands on the lower end. A larger split-level with multiple disconnects and failed insulation runs toward the higher figure. Duct insulation replacement adds $600 to $1,800 depending on how much of the run needs new wrap. If we find crushed flex or a disconnected collar, we’ll show you the camera footage and give you a written price before any repair happens. Estimates are free. Call (850) 660-3272 and we’ll schedule a Palmetto Bay visit.
We Also Serve Cities Near Palmetto Bay
Hollis Air Duct Miami serves Palmetto Bay and the surrounding south Florida communities. The same crew that seals ducts in Old Cutler also handles work in Miami, Miami Beach, Miami Gardens, and Doral. If you’re in one of those areas and need duct sealing or insulation, call (850) 660-3272 for a written quote.
Serving Palmetto Bay, FL - Our Local Coverage Area
We’re based in the Palmetto Bay 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 Palmetto Bay
That dark ring is condensation, not dirt. It forms when humid attic air meets the cold surface of the duct boot at the register. In Palmetto Bay’s heavy rain season, attic humidity spikes, and the ring shows up fast. It means moisture is getting inside the duct run, usually through a failed seal or missing insulation. Fixing it means sealing the run and replacing the insulation where it’s broken down. Our crews see this exact failure in homes all over the village. Call (850) 660-3272 and we’ll inspect the run with a camera before quoting anything.
Yes, in most cases. Duct sealing with mastic closes the leaks that cost you cooling and pull in humid air. If the runs are still structurally sound, sealing plus new insulation restores the system. We’ve done this in 1970s ranches in the Old Cutler area where the alternative was a full replacement costing thousands more. We’ll tell you honestly if a run is too far gone to save. When sealing makes sense, you get the fix for a fraction of replacement cost. Call (850) 660-3272 and we’ll give you a straight written answer.
Every three to five years. Palmetto Bay’s salt-laden air and high humidity wear through duct seams faster than inland areas of Miami-Dade. A system sealed today can develop new pinhole leaks within five years, especially near return runs that pull in salty attic air. If you haven’t had an inspection since before your last HVAC replacement, schedule one now. Our Palmetto Bay inspections include camera work, so you see what we see. Call (850) 660-3272 to book.
Duct cleaning removes accumulated dust, pollen, and debris from inside the duct run. Duct sealing closes the leaks that let humid attic air, insulation particles, and more pollen into that same run. They’re different jobs, but they work together. A clean duct that leaks still pulls in bad air a month later. A sealed duct that was never cleaned is just sealing in the contamination. In Palmetto Bay, where pollen and humidity hit hard, we usually recommend both. The written estimate covers exactly what we’ll do and what it costs.
It will cut it down significantly. Sealed ducts stop the negative pressure that pulls attic dust and outdoor particles through gaps at seams, collars, and registers. What gets filtered at the return stays filtered. Pollen that settles on duct surfaces still needs periodic cleaning, especially during oak season in the spring. But a sealed system stays cleaner longer. Call (850) 660-3272 for a free estimate on sealing your Palmetto Bay system.
Ready to stop losing conditioned air into your attic? Call Hollis Air Duct Miami at (850) 660-3272 for a free duct sealing estimate in Palmetto Bay. We’ll inspect your system, show you what’s leaking, and put a written price in your hand before any work starts. The 365-Day Done Right Promise covers every seal we make.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Palmetto Bay with duct sealing and insulation under The Garrison Standard.