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 Doral
Duct sealing in Doral typically runs $450 – $1,200 for a standard single-family home, depending on duct count, accessibility, and whether insulation is needed at the same time. Most jobs wrap in a single visit, though larger homes with extensive attic runs can take two. If air is leaking from your ducts, you’re paying to cool your attic, not your living room. Call us at (850) 660-3272 and we’ll give you a written price before anything gets touched.
We know Doral. We know the gated communities off NW 87th Avenue, the condo corridors along NW 107th Avenue, and the master-planned neighborhoods where construction crews are still finishing houses three streets over. That matters because new construction dust and builder-grade duct tape are two of the biggest reasons Doral homeowners call us in the first place. When you schedule with us, you get a crew that has already worked your neighborhood, knows what’s in those ducts, and brings the right equipment to fix it the first time.
Why Hollis Air Duct Miami Is Doral’s Preferred Duct Sealing Company
Doral homeowners keep our number for one reason: we write the price down before the work starts, and that price does not move. No door-knock upsells, no “while we’re in there” additions. Roy Castellanos runs our crews on The Garrison Standard: arrive inside the quoted window, do the job by the book, and leave the site cleaner than we found it. Every technician is background-checked and uniformed, so you know exactly who’s walking into your home.
Our Duct Sealing team works Doral weekly. We stock mastic, tape, insulation, and replacement registers on the truck, which means we’re not running back to a supply house halfway through your job. Phones are answered by a live person 24/7, so when you call about a musty smell coming from your vents at 9 p.m., you talk to a human, not a voicemail loop. And every job is backed by the 365-Day Done Right Promise: if the seal fails within a year, we come back at no charge. That’s written on your invoice, not just promised over the phone.
We coordinate dispatch and scheduling from our Miami office, but the crews serving Doral are local. They know which communities have attic-access ducts versus slab-floor runs. They know humidity here is the silent killer of foil tape. And they know that a 2018-built home can have dirtier ducts than a 1995 home, because builders rarely clean before handover.
Styles & brands we work with
Duct Insulation in Doral
Duct Insulation in Doral matters more here than in drier parts of Florida. When cold air moves through uninsulated or under-insulated ducts in a humid attic, condensation forms on the outside of the duct. That moisture soaks into insulation, drips onto drywall, and creates exactly the conditions mold needs. We see it most often in homes where the original insulation was compressed during construction or pulled back by other trades and never re-secured.
For a typical Doral single-family home, adding or replacing duct insulation on the main trunk and branch lines runs $800 – $1,800. Condo units with short duct runs in utility closets cost less, usually $400 – $800. The variables are duct length, attic access, and whether the old insulation needs removal first. We use closed-cell and fiberglass wraps rated for South Florida’s humidity, not the cheap reflective bubble wrap some crews slap on and call it done.
When Builders Skip It
We’ve opened attics in Doral where the builder insulated the supply trunk but left the return lines bare. That’s a guaranteed condensation problem within two summers. We inspect every accessible run with a camera before we quote, so you know exactly what’s there and what it needs.
Post-Construction Insulation Repair
If drywall crews crushed your duct insulation during a remodel or you had pest activity in the attic, the insulation may be compromised in sections rather than uniformly. We can replace damaged segments without re-insulating the entire system, which keeps cost down while stopping the condensation at its source.
HVAC Duct Sealing in Doral
HVAC Duct Sealing in Doral is not optional if your ducts run through a hot, humid attic. The Department of Energy estimates that typical duct systems lose 20 – 30% of conditioned air through leaks, and in Doral’s climate that percentage skews higher because the temperature differential between attic and living space is so extreme. A leaky duct pulls hot, dusty attic air into your home and pushes cooled air out. Sealing with mastic and UL-listed tape closes those gaps and keeps the air where it belongs.
Whole-system duct sealing for a Doral home runs $450 – $1,100, depending on duct count and accessibility. That includes camera inspection, sealing all accessible joints with mastic, and a post-seal airflow check. If your system has been sealed before with foil tape that’s now peeling, we remove the old tape first. Foil tape dries out and fails in Doral’s humidity, usually within two years. Mastic doesn’t.
Builder-Grade Tape Failure
We regularly see homes built in the last five years where the builder’s foil tape has peeled at the plenum connections. The gap might be half an inch, but that’s enough to lose a significant amount of airflow. We remove the failed tape, clean the joint, and apply mastic that remains flexible and sealed for the life of the duct.
Sealing After Post-Construction Cleaning
If your ducts were cleaned after construction but never sealed, the access cuts and joints remain open. Dust returns within months. We seal those openings after cleaning, which is the only way to make the clean actually stick, and we also offer Doral Dryer Vent Cleaning to remove lint buildup that restricts airflow.
Trusted Brands We Service in Doral
We work on all major duct and filtration systems, and our trucks carry Rotobrush rotary brush systems, Nikro negative-air machines, and Guardsman filtration products. If your Doral home has Honeywell or Aprilaire filtration integrated with the ductwork, we service that too. Because we stock common parts and sealants on the truck, most Doral jobs don’t require a second visit for parts. If we need something specific, our Miami office can have it in Doral same day. We don’t have to special-order basics like mastic, UL-listed tape, or insulation wrap, and that keeps your project moving.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Doral Homes
- Builder-grade foil tape peeling at attic joints. Doral’s humidity combined with attic temperatures above 130°F breaks down the adhesive within two years. The tape curls, the gap opens, and conditioned air leaks into the attic. We replace it with mastic and UL-listed tape that stays put.
- Construction dust clogging supply registers in newer homes. Homes built near active developments off NW 87th Avenue and NW 107th Avenue take in fine dust through the construction cycle. If ducts weren’t sealed after final clean, that dust keeps circulating through the blower and back into living spaces.
- Condensation-driven mold in ducts that weren’t sealed after cleaning. When post-construction cleaning leaves duct access panels unsealed, humid attic air enters the ducts at night. That moisture supports mold growth on dust and insulation fibers. Sealing the access points stops the moisture source.
- Return-side air leaks pulling attic air into the home. Negative pressure on the return side means even small gaps pull hot, dusty attic air in. Homeowners notice more dust on furniture and higher summer electric bills. Sealing the return plenum and branch lines is often the highest-impact fix we make in Doral attics.
Pricing for Duct Sealing in Doral, FL
Here’s what you can expect to pay in Doral for duct sealing work. A standard single-family home with 8 – 12 ducts runs $450 – $1,100 for whole-system sealing. Larger homes with 14 – 20 ducts run $1,000 – $1,800. Duct insulation replacement typically adds $800 – $1,800 depending on how much of the system needs re-wrapping. Condo units with shorter runs fall on the lower end, typically $300 – $700 for sealing. What affects cost is duct count, attic access, and whether we’re removing failed tape or old insulation first. We give you one written price per job before any work starts. Call (850) 660-3272 and we’ll walk the system with you and confirm the number in writing. No per-vent pricing, no bait numbers that grow once we’re on site.
We Also Serve Cities Near Doral
Our crews cover Doral and the surrounding South Florida cities. We run calls to Duct Sealing in Doral daily, but we’re also in Miami, Miami Beach, Miami Gardens, and Aventura regularly. If you’re in one of those cities and need a written quote on duct sealing or insulation, the same crew, the same equipment, and the same 365-Day Done Right Promise apply. One call to (850) 660-3272 and we’ll schedule it.
Serving Doral, FL - Our Local Coverage Area
We’re based in the Doral 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 Doral
Because the builders almost never seal them properly. New construction ducts in Doral are typically assembled with foil tape that fails within two years due to attic heat and humidity, and construction debris is rarely cleaned out before handover. Sealing a new home’s ducts to NADCA standards closes the gaps that builder tape leaves open and stops the construction dust from circulating.
The biggest source is fine construction dust from surrounding development. In Doral, where NW 87th Avenue carries relentless construction traffic and new phases of master-planned communities go up continuously, that dust gets pulled into unsealed return ducts and coats everything from registers to the blower motor. Sealing the supply and return ducts is the only way to prevent re-contamination after cleaning.
Sealing closes the gaps where humid attic air enters the ducts at night. When Doral’s subtropical humidity meets the cool surfaces inside your ducts, condensation forms. That moisture, combined with dust or drywall particles, supports mold. Sealed ducts keep that humid attic air out, which removes the moisture source mold needs.
Yes. Condo duct runs are shorter than single-family homes, but they often pass through unconditioned utility closets or soffits, which means leaks still bleed cooled air into spaces you don’t live in. Sealing those runs typically cuts 10 – 20% off the portion of your electric bill tied to AC, and in Doral where the AC runs nearly year-round, that adds up. Call (850) 660-3272 and we’ll inspect your specific unit before quoting anything.
Rarely. Most production builders in Doral wrap construction without a final duct inspection beyond a basic airflow test. The tape may look fine at walkthrough, but it’s already degrading. We opened a 2018 home off NW 87th Avenue recently where the builder’s foil tape had peeled at every plenum connection and drywall dust coated the blower motor. The homeowner had lived there two years before noticing the upstairs wasn’t cooling. If you’ve just closed on a Doral home, call us for a camera inspection. It’s the only way to know what’s actually in your ducts.
If your Doral home’s ducts are leaking, dusty, or carrying construction debris, call Hollis Air Duct Miami at (850) 660-3272. Roy Castellanos and our crews will inspect, seal, and stand behind the work in writing for a full year.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Doral and surrounding South Florida communities.