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 Fountainebleau
Duct sealing in Fountainebleau typically costs between $450 and $1,200 for a whole-system seal on a low-rise condo or townhome, with most jobs completed in a single day. If you’re losing conditioned air into a hot attic or pulling humid outside air through separated flex duct, sealing is the fix that cleaning alone won’t solve. We serve every block of Fountainebleau, from Fontainebleau Blvd down to the quiet courts west of NW 107th Ave, and we know exactly what these 1960s-1980s buildings throw at a crew. Call (850) 660-3272 for a free, written estimate before you lose another month of cooling dollars to leaks you can’t see.
Why Hollis Air Duct Miami Is Fountainebleau’s Preferred Duct Sealing Company
We’ve spent enough time inside Fountainebleau’s low-rise multifamily buildings to know the difference between a duct that needs mastic and one that needs to go. The original flex duct in these 1970s and 80s condos separates at the registers, the tie rods rot in the humidity, and the shallow ceiling plenums hide leaks that cheaper crews never find. Our technicians arrive uniformed, background-checked, and carrying Rotobrush and Nikro negative-air equipment that lets us seal ducts while keeping the workspace under negative pressure. That matters when you share a ceiling plenum with a neighbor. Every job gets a written price before we touch anything, and every seal is covered by the 365-Day Done Right Promise. If it fails within a year, we come back at no charge. Roy Castellanos runs our team to one standard: show up inside the window, price in writing, do it by the book, leave the site clean.
Styles & brands we work with
Duct Insulation in Fountainebleau
Duct Insulation in Fountainebleau is not a comfort upgrade. It’s the difference between paying to cool air inside a duct and paying to cool the attic around it. In these low-rise buildings, the original insulation on flexible ductwork has usually compressed, torn, or soaked up enough humidity to become a damp blanket wrapped around your air. We remove the failed material, wrap the accessible runs with new insulation rated for South Florida’s humidity, and seal the jacket so condensation can’t get back in. A typical duct insulation job in Fountainebleau runs $300 to $600, depending on how much of the run is accessible without pulling drywall.
When Insulation Replacement Makes Sense
If your ducts sweat in the summer, or if you can see blackened fiberglass where the outer jacket has split, the insulation is no longer doing its job. Replacing it before the rainy season starts keeps mold out of the plenum and keeps your system from working against itself.
What We Check Before Wrapping
We inspect the duct body itself before we spend your money on insulation. Wrapping insulation around a duct that’s already leaking at the register is a waste. If the inner liner is torn or the flex has separated, we seal or replace that run first, then insulate it properly.
HVAC Duct Sealing in Fountainebleau
HVAC Duct Sealing in Fountainebleau means closing the gaps in your duct system so the air your handler pushes actually reaches the rooms you’re trying to cool. In these 1960s-1980s buildings, we find leaks at the register boots, at the plenum connections, and inside the shared ceiling cavities that run between units. We use mastic and fiberglass mesh, not tape. Tape dries out and peels in a Fountainebleau attic within two seasons. Mastic goes on wet, cures to a hard shell, and stays. A full HVAC duct sealing job in Fountainebleau ranges from $500 to $1,000 for a typical two-bedroom condo, less if the accessible runs are short and the leaks are concentrated.
Why Tape Fails Here
Fountainebleau’s humidity keeps joint surfaces damp for months at a time. Adhesive tape, even the foil kind, loses its bond when condensation cycles through the attic every afternoon storm. We see tape jobs from other companies that have literally peeled off and are hanging from the duct like streamers.
Sealing vs. Cleaning: The Order Matters
You seal first, then clean, or you waste the cleaning. If we clean a duct system that’s still pulling attic air through open joints, you’ll be breathing that dust again in a month. We seal the leaks, then run the negative-air cleaning so the dust that’s already in the system gets pulled out and captured. The order is not optional.
Trusted Brands We Service in Fountainebleau
We work on duct systems built with Guardsman flex duct, and we use Rotobrush and Nikro equipment for the sealing and cleaning side. We carry Guardsman repair materials and replacement flex sections on our trucks for the most common sizes found in Fountainebleau condos, which means we don’t have to leave mid-job to chase a part. If your system is running Honeywell filtration at the handler, we’ll work around it and make sure the sealed ductwork doesn’t compromise the filter’s pressure story. Our goal is simple: get the right material on the right leak the first day.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Fountainebleau Homes
- Hidden plenum leaks in shared walls and ceilings. In buildings where the return air runs through a common cavity, we find gaps that pull air from neighboring units. Sealing these requires access waivers from the HOA, because the fire-rated ceiling assembly can’t be cut without written approval.
- Original flex duct separated at the register boot. The plastic connectors from the 1970s and 80s get brittle in the heat and crack. Air that should be going to your bedroom is dumping into the chase above your closet.
- Condensation-soaked insulation pulling the duct joints apart. When the outer jacket gets saturated, the weight of the wet insulation literally yanks the flex duct down and opens the connection points. We find this most often after a heavy summer storm cycle.
- Storm-driven water intrusion that homeowners mistake for a simple leak. After a rain event in Fountainebleau, water can push through the roof edge and into the shallow ceiling plenum. The duct looks fine from the register, but the inside is wet, and the joints are opening up as the duct sags.
Pricing for Duct Sealing in Fountainebleau, FL
You should know what you’re walking into before you call. A straightforward duct sealing job in a two-bedroom Fountainebleau condo, where the accessible runs are short and the leaks are at the boots, runs $450 to $700. If we’re also cutting in access panels, working around fire-rated assemblies, or replacing insulation, the number moves to $800 to $1,200. We write the price down before we start. That price does not change when the technician gets inside. Every job includes before-and-after airflow readings so you can see the difference in numbers, not just feel it. Call (850) 660-3272 for a free estimate, and we’ll give you a written number on the spot.
We Also Serve Cities Near Fountainebleau
Our crews work throughout the surrounding area, including Miami, Miami Beach, Miami Gardens, and Doral. If you’re in Fountainebleau or any neighboring community, our Duct Sealing team can schedule you this week. For a closer look at what we do in this specific market, see our full Duct Sealing in Fountainebleau coverage page.
Serving Fountainebleau, FL - Our Local Coverage Area
We’re based in the Fountainebleau 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 Fountainebleau
We coordinate directly with your condo association before we cut into any ceiling or plenum space. In Fountainebleau, many associations require a signed liability waiver for work inside fire-rated ceiling assemblies or shared plenum spaces. We get the waiver. We don’t ask you to chase it down. Call (850) 660-3272 if you’re in a building where the board is asking for documentation before they’ll approve access. We’ve done this enough times to know exactly what the property manager needs to see.
We run a camera through the system and look at three things: whether the inner liner is still intact, whether the flex has collapsed or kinked, and whether there’s standing water or visible mold inside the duct itself. If the liner is torn or the duct has been saturated for more than a day or two, sealing can’t fix the problem. If the joints are loose but the duct body is still sound, we seal them with mastic and document the repair. We’ll show you the camera footage so you’re not taking our word on faith.
Because cleaning only removes dust that’s already inside the system. If the return side has open joints or the register boots are separated, the system is actively pulling attic air in with the air you’re trying to condition. No amount of cleaning fixes that. The repair is sealing the leaks first, then cleaning. In Fountainebleau’s older buildings, these leaks are almost always at the original flex connections and the return plenum. We find them with a pressure test, seal them, and then the dust stops coming back. Call (850) 660-3272 for a leak check if you’ve cleaned twice and still see dust.
Yes, and this is one of the main reasons condo owners in Fountainebleau call us after a storm. We photograph the damage before we touch anything, record airflow readings before and after the seal, and give you a written summary of what was found and what was done. Insurers deny storm-related duct replacement claims when the damage wasn’t proven. We prove it. You get the documentation in a format that a claims adjuster can read without calling us to interpret it.
Yes. We use negative-pressure equipment with HEPA filtration on the downstream side, so we’re not pushing dust or sealant fumes into adjacent units through shared plenum spaces. The negative-air setup keeps the workspace under vacuum while we apply mastic, which means the air moves toward our equipment, not toward your neighbor’s return. We also work within normal daytime hours and keep the hallway clean. If your building has a shared return chase, we’ll cap ours before we start so the cycle doesn’t pull from next door.
Duct sealing in Fountainebleau is a repair, not a routine service. If your cooling bills crawl up every summer, or if you wipe dust off the registers every week, the problem is in the ductwork, not the filter. Call (850) 660-3272 for a free written estimate. We’ll find the leaks, show you the footage, and put a price in front of you before we start.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Fountainebleau and the surrounding South FL area since 2004.