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 Pinecrest
Duct sealing in Pinecrest typically costs between $850 and $2,400 depending on how much of the system needs attention, what condition the existing ductwork is in, and how many AC zones your home runs. That’s the honest range, in writing, before anyone climbs into your attic. For a large custom home with multiple zones and long duct runs, expect to be on the higher end. We’re the air duct team Pinecrest homeowners call when rooms won’t cool evenly, utility bills climb in August, or a musty smell keeps coming back after a cleaning. Call (850) 660-3272 and a live person answers, day or night.
Pinecrest is not a tract-home market. The houses here are big, custom-built, and often hide duct problems in attics nobody thinks about until something fails. That’s exactly where we work. The team at Duct Sealing in Pinecrest knows these homes because we’re in them every week, tracing runs over 100 feet and finding leaks the original builder never intended.
Why Hollis Air Duct Miami Is Pinecrest’s Preferred Duct Sealing Company
We’re part of the Garrison Partners family, and that name carries a specific standard. Hollis Air Duct Miami has been doing this work since 2004, longer than most crews you’ll find in South Florida. Every technician is background-checked and uniformed. You’ll know the person walking into your Pinecrest home before they arrive, and the price will already be in writing.
Our Duct Sealing crews work under The Garrison Standard: arrive inside the quoted window, price the job before touching anything, do the work by the book, and leave the site clean. No moving targets at the door. The 365-Day Done Right Promise backs every job in writing. If a sealed joint fails within a year, we return at no charge, including a free second visit. That’s not a sales line. It’s the way Roy Castellanos runs this operation.
Pinecrest homeowners call us because attics here are punishing. Hot, humid, and full of long duct runs that degrade faster than they do in most of Miami-Dade. We know what that environment does to mastic, tape, and flex connections, and we seal accordingly.
Styles & brands we work with
Duct Sealing Services in Pinecrest
Duct Sealing Services in Pinecrest address the leaks, gaps, and disconnected joints that quietly bleed conditioned air into unconditioned spaces. For a Pinecrest homeowner, the trigger is usually obvious: one bedroom never gets cool, a hallway stays warm, or the electric bill spikes during summer while the AC runs nonstop. The work involves locating each leak, cleaning the surrounding duct surface, and sealing with commercial-grade mastic and UL 181-rated tape, not the silver stuff from a hardware store.
Attic Duct Sealing
Most Pinecrest ductwork lives in the attic, where summer temperatures routinely exceed 130 degrees. Mastic dries out. Tape loses its grip. Joints separate. We seal every accessible connection at the plenum, at wyes, and at register collars, then wrap the repair so it holds through years of heat cycling.
Plenum and Return Repairs
Returns are easy to overlook, but a leaky return pulls attic air, dust, and humidity directly into your AC stream. We check the return plenum and every return chase for gaps, then seal them to keep Pinecrest’s hot, damp attic air where it belongs – outside your living space.
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 Pinecrest
Duct Insulation in Pinecrest is a different job than sealing, though the two often go together. Sealing stops air leaks. Insulation stops thermal loss and condensation. In a Pinecrest attic, uninsulated or under-insulated ductwork sweats. That condensation soaks into insulation, breeds mildew, and eventually rots the duct lining. We replace damaged insulation, bring existing runs up to code, and wrap any exposed metal so it stops sweating and starts delivering the air temperature your AC actually produces.
Attic Duct Wrap
For fiberglass and metal ductwork, we re-wrap runs with proper R-value insulation and secure every seam. This is the difference between air leaving your air handler at 55 degrees and arriving at a bedroom register at 68 degrees because the attic heat stole the cold along the way.
Flex Duct Replacement
When flex ducts collapse or tear, insulation alone won’t fix them. We remove the damaged section and install new, properly supported flex, then seal and insulate the connections. Pinecrest homes with original flex from the 1980s and 90s often need this done in sections.
Trusted Brands We Service in Pinecrest
We work with professional-grade equipment, not hardware-store gear. Our Air Duct Cleaning and Duct Sealing crews use Rotobrush rotary brush systems and Nikro negative-air machines on Pinecrest jobs every week. For filtration and air quality work, we stock products from Honeywell, Aprilaire, and Guardsman. If your system already has these brands installed, we service them and keep common parts on the truck, which means faster turnaround when you need a repair or seal done in a single visit. No ordering and waiting. We bring what the job needs to Pinecrest the first time.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Pinecrest Homes
- Collapsed flex ducts in long attic runs. Pinecrest homes frequently have duct runs over 100 feet, especially in homes with multiple AC zones. Flex duct sags over time in the heat, kinks, and eventually collapses, strangling airflow to entire wings of the house.
- Disconnected joints at wyes and plenums. On a 6,200-square-foot Pinecrest estate off Southwest 128th Street, our techs found a 14-inch supply run that had pulled apart at a wye fitting, dumping 40% of cooled air into the attic. After a Rotobrush cleaning and camera inspection confirmed the separation, we sealed and reconnected the joint with mastic and UL 181 tape, then reinsulated and rebalanced the zone, restoring even airflow to the master suite and upstairs bedrooms.
- Failed 1970s-era metal duct connectors. Original canvas connectors and sealing tape on metal ducts degrade after decades of Pinecrest humidity. The leaks they leave are invisible from the living space, but they show up as rooms that never cool and bills that never drop.
- Condensation-driven mastic failure. Long duct runs in unconditioned attics develop condensation during Pinecrest’s humid summers. That moisture breaks down mastic over time, opening joints that quietly leak conditioned air while pulling in dust and humidity.
Pricing for Duct Sealing in Pinecrest, FL
Most whole-system duct sealing jobs in Pinecrest run between $1,200 and $2,400 when they involve long runs, multiple zones, and attic access with serious heat. Sealing a single disconnected joint or a short section of exposed ductwork is usually $350 to $600. If you’re pairing sealing with a full air duct cleaning, the combined work typically lands between $1,500 and $2,800 depending on system size. We write the price before any work begins, and it does not move at the door. Call (850) 660-3272 and Roy Castellanos or our scheduling team will give you a straight number.
The reason our pricing lands where it does is simple: we seal every accessible joint with commercial mastic and UL 181 tape, and we fix the insulation around every repair. We do not do per-vent pricing. We do not give a low teaser figure and then “discover” problems once the van is parked. One flat price per system, in writing, before work starts.
We Also Serve Cities Near Pinecrest
Our crews are on the road throughout South Florida, so if you’re in Miami, Miami Beach, Miami Gardens, or Doral, we can schedule your duct sealing with the same written pricing and 365-Day Done Right Promise we give every Pinecrest customer. Call (850) 660-3272 and a live person answers, 24/7.
Serving Pinecrest, FL - Our Local Coverage Area
We’re based in the Pinecrest 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 Pinecrest
If your AC runs constantly, certain rooms never reach the thermostat setting, or your utility bills climb every summer while you raise the temperature, you likely have duct leaks, not a dirty system. In Pinecrest attics, the giveaway is often visible: silver tape peeling at a joint, a sagging flex run, or dark streaks where condensation has been forming. Call (850) 660-3272 and we’ll send a camera into the ductwork and show you exactly what we find.
Yes. Duct sealing in attic spaces must use materials rated for the environment, specifically mastic or UL 181-rated tape, not standard cloth duct tape. That’s what we use on every Pinecrest job, both because code requires it and because it’s the only approach that survives the heat and humidity of a South Florida attic for years.
For many 1980s-era Pinecrest homes, sealing the existing metal or flex ductwork is enough if the ducts are still structurally sound. The failure points are usually the joints, the canvas connectors, and the sealing materials, not the duct bodies themselves. If a section of flex has collapsed or the insulation has rotted from condensation, we’ll tell you that section needs replacing, and we’ll show you why before quoting anything.
Often yes. Leaky return ducts pull attic air, dust, and humidity directly into your AC system. That’s a common source of the musty smell Pinecrest homeowners notice when the system first kicks on. Sealing the returns and plenum cuts off that attic air, and when paired with a full air duct cleaning using our Rotobrush and Nikro equipment, it usually eliminates the smell at the source. Call (850) 660-3272 for a straight answer about your system.
For a large Pinecrest home with two or more zones and attic duct runs over 100 feet, expect the full sealing job to take one full day, sometimes a day and a half if we’re also reinsulating or replacing flex sections. We quote a timeframe in writing before we start, and we arrive inside that window. The work gets done by the book, and the site gets left clean.
Call (850) 660-3272 for a free estimate on duct sealing in Pinecrest. We’ll give you a written price before any work begins, and we stand behind every job with the 365-Day Done Right Promise. If it’s not right within a year, we come back at no charge.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Pinecrest with duct sealing, duct insulation, and air duct cleaning backed by The Garrison Standard since 2004.