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.
Trusted Duct Sealing for Fort Lauderdale Homeowners
Duct Sealing in Fort Lauderdale typically costs between $350 and $1,200 depending on the size of the home, the number of leaks found, and how much of the ductwork is accessible. Most jobs are completed in a single visit, usually within four to eight hours. Leaky ducts in this climate do more damage than in drier parts of the country because our humidity gets pulled into every gap, forcing your AC to work against itself year-round.
Hollis Air Duct Fort Lauderdale has sealed ductwork in this city since 2004. We’re part of the Garrison Partners family and operate under The Garrison Standard: a written price before work starts, a job done by the book, and a site left clean. Roy Castellanos runs the crew, and every technician who walks through your door is background-checked and uniformed. Call (754) 354-3644 and you’ll speak to a live person, not a voicemail tree.
Duct Insulation
Duct Insulation is the layer of material wrapped around ductwork to slow heat transfer between the air inside the duct and the unconditioned spaces around it, and in Fort Lauderdale it is often the difference between an AC that keeps up and one that never shuts off. When insulation is missing, torn, or soaked through with condensation, the cold air leaving your air handler warms before it ever reaches the vent. We replace degraded insulation as part of most duct sealing jobs, and the work typically adds $150 to $400 to the total depending on how many linear feet need re-wrapping.
Attic and Chase Run Replacement
Most Fort Lauderdale homes have ductwork running through an unconditioned attic where summer temperatures can exceed 120 degrees. Insulation in those spaces degrades faster from heat, humidity, and occasional rodent activity. We inspect every run and replace the wrap wherever it has thinned or separated from the duct body.
Condensation and Mold Prevention
When cold ducts sit in warm humid air, condensation forms on the outer surface. That moisture soaks into the insulation, reducing its R-value and creating conditions where mold can take hold. Sealing leaks and re-insulating stops the sweating at the source rather than treating the stain it leaves behind.
Styles & brands we work with
HVAC Duct Sealing
HVAC Duct Sealing is the process of closing every gap, seam, and disconnected joint in your forced-air system so the air your AC produces actually reaches the rooms you paid to cool. The U.S. Department of Energy estimates that the average home loses 20 to 30 percent of conditioned air through duct leaks, and in Fort Lauderdale that number can run higher because high humidity accelerates tape failure and joint separation. A full HVAC duct sealing job from Hollis Air Duct Fort Lauderdale typically runs $450 to $900 and includes a blower-door leak test before and after so you can see the measured improvement.
Mastic and Mechanical Fastening
We seal with duct mastic, a thick paste that hardens into a permanent flexible barrier, plus mechanical fasteners where duct sections have pulled apart. Tape on its own fails in Florida heat. Mastic, applied correctly, lasts the life of the duct.
Blower Door Verification
Before we finish, we re-pressurize the system and measure air loss the same way it was measured at the start. You get the before and after numbers in writing. If the improvement falls short of what we estimated, the job is not done, and you don’t pay for a job that isn’t done right.
Duct Repair
Duct Repair covers the structural fixes that go beyond sealing: reconnecting sections that have separated, replacing crushed or collapsed flex duct, patching holes, and re-hanging runs that have sagged. In Fort Lauderdale, we see a lot of damage from roof leaks, pest intrusion, and older installs that were run incorrectly from the start. Repair work at Hollis Air Duct Fort Lauderdale is priced in writing before we touch anything, with most repairs landing between $200 and $600 depending on what we find.
Flex Duct Replacement
Flex duct has a working lifespan of roughly 15 to 20 years in Florida’s humidity before the inner liner starts to break down. When that happens, air leaks through the liner even when the outer shell looks intact. We replace failed flex runs with properly sized new duct, not patched sections that will fail again next season.
Sag and Support Correction
Sagging duct creates low points where condensation collects and water eventually drips through your ceiling. We re-hang runs with proper strapping so the slope drains toward the air handler the way it is supposed to. This is part of the Garrison Standard on every repair job we do.
Air Duct Sealing
Air Duct Sealing specifically means the work of locating and closing the points where air escapes or enters the ductwork outside the living space. That matters for two reasons in Fort Lauderdale: every cubic foot of cool air that leaks into your attic is money spent cooling a space nobody lives in, and every cubic foot of attic air that gets pulled in through return leaks is hot, humid, and usually dusty. A targeted Pompano Beach Duct Sealing job, where we find and fix the worst offenders rather than resealing every seam in the house, runs $300 to $700.
Aeroseal-Style Leak Reduction vs. Manual Sealing
You may have heard of aerosol-based sealing systems that inject mist into the ducts to coat leaks from the inside. That approach works on small pinhole leaks but does nothing for separated joints or disconnected runs. We seal manually with mastic and mechanical fasteners, which is the method that holds up on the bigger gaps common in older Fort Lauderdale homes.
When Partial Sealing Makes Sense
Not every home needs a full system seal. If your blower-door test shows the leaks are concentrated in one or two accessible runs, we’ll seal those and give you the numbers to prove the improvement. You pay for what was fixed, priced before the work starts, not a package you didn’t need.
Duct Sealing Services
Plantation Duct Sealing services at Hollis Air Duct Fort Lauderdale cover the full range of work needed to make your duct system airtight: testing, sealing, insulation repair, and documentation of the results. Every job begins with a visual inspection, followed by pressure-based leak testing to quantify the problem, then a written quote that covers the entire scope. A complete duct sealing service on a typical 2,000-square-foot Fort Lauderdale home runs $500 to $1,000.
Post-Work Airflow Balancing
After the ducts are sealed, the air moving through your system changes. Some rooms will get more airflow, which means other rooms need damper adjustments to keep the comfort level even. We balance the system as the final step so one bedroom doesn’t turn into an icebox while the den stays warm.
Documentation For Your Records
You get the pre-seal and post-seal leakage numbers in writing, along with a list of every location we addressed and what was done there. That record matters if you sell the home, and it matters if anything comes up during the 365-Day Done Right Promise window.
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.
Brands We Service
Ductwork is not brand-specific the way an air conditioner is, but the equipment we use to clean and inspect ducts is, and the filtration products we install come from manufacturers with reputations that matter. We run Rotobrush rotary brush systems for duct cleaning, Nikro negative-air machines for dust containment, and install filtration from Honeywell and Aprilaire. If your duct sealing job involves a filtration upgrade, we carry Guardsman products as well.
What that means for you is simple: the tools we use are the same professional-grade equipment commercial contractors run, not hardware-store gear rated for light duty. Whether you have metal ductwork, flex duct, or a mix of both, we have the equipment to test, seal, and verify the job. We service every brand of ductwork in every kind of home in Fort Lauderdale, Pompano Beach, and Plantation.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Some rooms never reach the thermostat temperature. When one bedroom stays five degrees warmer than the hallway no matter how low you set the AC, the most common cause is a duct leak or disconnect on that branch run. The air you paid to cool is dumping into the attic before it reaches the vent.
- Your electric bill is climbing while your usage habits haven’t changed. A leaky duct system can add 20 to 30 percent to your cooling cost because the AC has to run longer to hit the setpoint. If the bill goes up in summer but the house doesn’t feel any cooler, air is escaping somewhere.
- You can see dust streaks around ceiling registers. Those gray smudges around a vent are a telltale sign of return-side leakage. The system is pulling dirty attic air in around gaps, filtering it insufficiently, and blowing it into your living space.
- You hear a whistling noise when the fan kicks on. Air moving through a small gap under pressure makes a high-pitched sound. That gap is a leak, and it is only going to get bigger as the pressure keeps working on it.
- Your AC struggles on every hot afternoon. A system sized correctly that suddenly can’t hold 76 degrees on a hot day is often losing a third of its output through duct leaks. Sealing the ducts costs a fraction of replacing the condenser, and it fixes the actual problem.
Our Process, Step by Step
- 1
Inspect and test. We walk the accessible ductwork and then run a pressure test to measure total leakage across the system. That number gives us a baseline, and it tells you how much air you are losing before we touch anything. You see the number in writing, along with what it means for your energy bill.
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Quote the work in writing. Based on what the test reveals, we write a fixed price for the entire job. That price does not move when we are inside the work area. If the scope grows, the change order is written up and approved by you before anything is done.
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Seal and repair. We work through the system methodically, applying mastic at every accessible seam, joint, and connection, and mechanically reconnecting any separated sections. Where insulation is damaged, we replace it. This is the step where most of the time on the job is spent.
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Verify the results. We re-run the pressure test and compare the before and after numbers. The improvement is documented and handed to you. If the leakage reduction doesn’t meet the expectation we set in writing, we keep working before we call the job done.
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Balance and leave the site clean. Final step is damper adjustment so cooling is even across rooms, then a walkthrough with you to confirm the work. The site is left the way we found it, with all materials removed. That is what The Garrison Code requires, and what the 365-Day Done Right Promise backs in writing.
How Much Does Duct Sealing Cost in Fort Lauderdale?
Most Coconut Creek Duct Sealing jobs in Fort Lauderdale fall between $350 and $1,200, with the average single-family home landing around $600 to $800 for a full system seal. The spread depends on measurable factors we can explain before you commit: the square footage of the home, how much ductwork is accessible in the attic, the severity of the leaks we find, and how much insulation needs replacing as part of the work. A targeted partial seal on a smaller home can run as low as $300 when the leaks are concentrated in one or two accessible locations.
What moves the price most is accessibility. A one-story ranch with an open attic is faster to work in than a two-story home with vaulted ceilings over part of the duct run. Older homes in Fort Lauderdale’s established neighborhoods like Riverside Park and Victoria Park tend to have original metal ductwork that has outlived its tape and mastic, which often means more sealing points but less structural repair. Newer flex-duct installs can have fewer joints, but the flex itself sometimes needs replacing rather than sealing.
The cheapest bid is rarely cheap for long. A $99 “whole-house sealing special” either is not sealing the whole house, or it is using tape that will peel in Florida humidity within a year. Hollis Air Duct Fort Lauderdale gives you a written price based on a real pressure test, not a coupon. That price includes the sealing work, insulation repair where needed, and the documented before-and-after leakage numbers. Call (754) 354-3644 for a free estimate, and you’ll get a number in writing before any work is scheduled.
Our Service Area Near Fort Lauderdale
Hollis Air Duct Fort Lauderdale serves homeowners throughout Broward County, including home base in Fort Lauderdale and the surrounding communities of Sunrise, Margate, Coconut Creek, Dania Beach, Pembroke Park, Hallandale Beach, North Lauderdale, Ojus, and Lighthouse Point. If you are in Fort Lauderdale or nearby, we’ll schedule around your workday and arrive inside the window we give you. That’s part of the Garrison Standard.
Serving Fort Lauderdale, FL - Our Local Coverage Area
We’re based in the Fort Lauderdale area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Duct Sealing in Fort Lauderdale
Duct sealing is the process of closing every leak, gap, and disconnected joint in your HVAC ductwork using mastic sealant and mechanical fasteners. It stops conditioned air from escaping into unconditioned spaces like attics and wall cavities. The result is lower energy use and a house that reaches the thermostat temperature faster.
Most Fort Lauderdale homes take between four and eight hours to seal, depending on the size of the house and how much of the ductwork is accessible. We schedule the job as a single visit so you don’t have to take multiple days off work. We arrive inside the quoted window, per the Garrison Standard.
A typical duct sealing job runs $350 to $1,200, with most homes landing between $600 and $800. The price depends on home size, accessibility, leak severity, and how much insulation needs replacing. You’ll get the exact price in writing before we start, and that number does not move at the door.
Yes. When a duct sealing job includes filtration work, we install Honeywell and Aprilaire products, along with Guardsman filtration components. These are the same brands commercial contractors run. Our techs can explain what each upgrade does before you spend a dollar on it.
Most jobs can be scheduled within a few days of your call. We don’t push same-day sealing because a proper pressure test takes time to set up and run correctly. Call (754) 354-3644 and we’ll find the earliest slot that works for your schedule.
Every duct sealing job we do is covered in writing for a full year. If the seal fails anywhere we worked, we come back and make it right at no charge, including a free second visit. That guarantee is written into every quote and invoice, not promised verbally.
Clear a path to your attic access and move any stored items away from the access hatch. If you have pets, keep them in a closed room while we are in and out. We handle the rest: drop cloths, equipment setup, and a full clean-up before we leave. Nothing is left behind but the paperwork and the number to call us back.
Schedule Your Duct Sealing Service in Fort Lauderdale Today
If your AC is running and your house still isn’t cooling, the ducts are the first place to look. Call Hollis Air Duct Fort Lauderdale at (754) 354-3644 for a free estimate. You’ll get a written price before any work starts, and every job is covered by the 365-Day Done Right Promise. Roy Castellanos and his crew are ready when you are.
Written by Roy Castellanos, Owner at Hollis Air Duct Fort Lauderdale, serving Fort Lauderdale since 2004.