Whole-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.
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AfterFast, Reliable Duct Sealing Across Miami Gardens
Duct sealing in Miami Gardens typically runs $450 – $1,200 for a whole-home job, depending on how much of the system needs attention and whether we’re repairing crushed flex runs or sealing original plenum seams. Most Miami Gardens homes we see are 1960s – 1980s CBS construction with ductwork that has never been properly sealed since the day it was installed. We’re the Duct Sealing team at Hollis Air Duct Cleaning, and we dispatch to Miami Gardens from our South Florida office. Call (361) 326-5060 for a free estimate.
We know the neighborhoods here. Bunche Park, Lake Lucerne, Norland, the ranch homes along NW 183rd Street. These aren’t cookie-cutter developments. They’re modest, solid houses built when Miami Gardens was growing fast, and their duct systems show every year of that age. Our technicians carry mastic sealant, metal-backed tape rated for Florida humidity, and replacement flex duct for the crushed runs we find in low attics. We don’t quote over the phone and then change the price at the door. The price is written before we start.
Why Hollis Air Duct Cleaning Is Miami Gardens’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Miami Gardens customers come back because we show up inside the window, price in writing, and leave the site clean. That’s The Garrison Standard, and it’s how every Hollis location operates, including ours serving Miami Gardens.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues. When you schedule duct sealing or Miami Gardens Dryer Vent Cleaning, you get a background-checked, uniformed technician who arrives in a marked van. We use Rotobrush rotary systems and Nikro negative-air equipment, and we stock filtration products from Aprilaire and Guardsman for Miami Gardens homes that need MERV upgrades after sealing.
The 365-Day Done Right Promise covers every job in writing. If the seal fails, if a crushed run we replaced collapses again, if the musty smell returns, we come back at no charge. That includes a free second visit. Most competitors won’t put a year-long guarantee on duct sealing. We do, because we price the job to do it once.
Duct Repair in Miami Gardens
Duct Repair in Miami Gardens means fixing the physical damage that makes sealing impossible: crushed flex runs in 120-degree attics, disconnected return plenums in garage closets, rodent-chewed insulation, and seams that have pulled apart after forty years of expansion and contraction. A typical duct repair in Miami Gardens runs $280 – $650 for isolated fixes, or $650 – $1,200 when combined with whole-system sealing. We always inspect with a camera first, so you see the damage before we quote.
Crushed Flex Runs and Disconnected Plenums
In Miami Gardens, the flex duct to back bedrooms often runs through unventilated attic space where summer heat exceeds 140 degrees. The plastic liner brittle-cracks, the wire coil collapses, and suddenly that bedroom is 10 degrees warmer with no airflow. We cut out the damaged section and replace it with properly supported flex duct, then seal the connection points with mastic.
Rodent Damage and Insulation Replacement
Roof rats are common in older Miami Gardens neighborhoods with mature fruit trees. They nest in attic insulation and chew flex duct for nesting material. We remove contaminated duct and insulation, seal entry points where we can access them, and reinstall with rodent-resistant materials where the situation calls for it.
Air Duct Sealing in Miami Gardens
Air Duct Sealing in Miami Gardens is the process of closing leaks in your supply and return ductwork so cooled air reaches the rooms it’s supposed to reach, instead of being lost into your attic, garage, or crawlspace. A typical whole-home air duct sealing job in Miami Gardens costs $450 – $1,200. We use mastic sealant and metal-backed tape, not the cheap cloth tape that peels in humidity. Every seam is accessible, every connection is verified with a static pressure test before we leave.
Mastic Sealing vs. Tape-Only Repairs
Mastic is a thick, flexible sealant that brushes onto seams and dries to a rubbery, vibration-resistant finish. In Miami Gardens’s humid climate, mastic outlasts tape by years. We use it on plenum seams, register boots, and wherever metal duct meets flex. Tape is for reinforcement, not primary sealing.
Static Pressure Verification
After sealing, we measure static pressure at the air handler to confirm the system isn’t working harder than it should. Many Miami Gardens homeowners see immediate drops in their electric bill because the AC isn’t fighting itself to push air through gaps.
Trusted Brands We Service in Miami Gardens
We carry professional-grade equipment and parts from Rotobrush, Nikro, Aprilaire, Abatement Technologies, and Guardsman. For Miami Gardens homeowners, that means no waiting on special orders for standard repairs. We stock replacement flex duct, mastic, register boots, and MERV-rated filtration upgrades on every van. If your system needs an Aprilaire media filter after we seal the ductwork, we can install it the same day. The tools are the same ones commercial crews use on schools and medical facilities. We just bring them to your house in Bunche Park or Lake Lucerne.
Common Duct Sealing Problems We See in Miami Gardens Homes
- Coral-rock dust coating original ductwork. Miami Gardens’ older CBS homes were built with concrete block made from local coral rock, and that fine dust settled into ducts during construction. It was never fully cleared. When we seal over that layer, we’re trapping mold food. Source removal comes first.
- Crushed flex runs in low, unventilated attics. The original flex duct to back bedrooms sits in attics that hit 140 degrees for months. The wire coil fatigues, the duct collapses, and sealing the seams does nothing because no air can flow through a flattened tube.
- Return plenum leaks in garage and closet air handlers. Many Miami Gardens homes have the air handler in a garage closet with a short return plenum assembled from duct board. Every seam leaks. The garage air, with car exhaust and lawn equipment fumes, gets pulled into the system.
- Year-round humidity degrading sealant prematurely. Miami Gardens has no heating season. AC runs 300+ days, and indoor humidity stays high. Cheap tape peels. Mastic holds, but only if the duct surface was properly prepared and the humidity was controlled during application.
Pricing for Duct Sealing in Miami Gardens, FL
Whole-home duct sealing in Miami Gardens typically costs $450 – $1,200. Isolated repairs, like a single crushed flex run or a leaking plenum, run $280 – $650. What moves the price: how much of the system we can access, whether we need to remove construction debris before sealing, and if the job includes replacing damaged duct sections or upgrading filtration.
We don’t do per-vent pricing. That’s the bait-and-switch model. We price per system, agreed in writing before we touch anything. The estimate is free. We inspect with a camera, show you the leaks, and write the price down. It doesn’t move at the door. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Miami Gardens
Our crews work throughout South Florida, including Duct Sealing in Miami Gardens and surrounding cities: Hialeah, North Miami Beach, Pembroke Pines, and Hollywood. Each job carries the same written price guarantee and 365-Day Done Right Promise, no matter which city we’re in.
Serving Miami Gardens, FL - Our Local Coverage Area
We’re based in the Miami Gardens 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 Miami Gardens
Your Miami Gardens home likely runs AC 300-plus days a year with no heating season, and the original coral-rock construction dust in older CBS homes creates a mold-friendly layer that breaks down sealant from the inside. Most northern cities get a winter break from cooling; Miami Gardens doesn’t. Call (361) 326-5060 for a free inspection and exact quote.
No, sealing alone won’t restore airflow through a flattened duct. We replace the crushed flex run first, then seal the connections. We were called to a 1970s CBS ranch near Bunche Park where the homeowner complained of musty air and high electric bills; camera inspection showed the return plenum in the garage closet was leaking at every seam and a flex run to the back bedroom had been crushed by years of attic heat and a rodent nest. After negative pressure setup and source removal with agitation tools, we sealed the plenum and replaced the crushed run, then verified with a MERV rating upgrade that the supply and return ducts held static pressure. The homeowner said the musty smell was gone within a day. Call (361) 326-5060 if you suspect a crushed run.
The dust creates a porous, contaminated surface that sealant can’t bond to properly, and it feeds mold growth that continues blowing spores through registers even after sealing. We remove the dust with rotary brush agitation and negative-air extraction before applying mastic. Sealing over it is a temporary patch at best. Call (361) 326-5060 to schedule source removal and proper sealing.
Every 3 to 5 years for inspection, and sealing whenever pressure tests show leakage above 15 percent. Homes with original construction dust, rodent history, or prior water intrusion may need more frequent attention. We don’t sell annual packages you don’t need. Call (361) 326-5060 and we’ll test your system honestly.
Sealing alone doesn’t kill mold, but it stops the humid outside air from entering the duct system and feeding new growth. In Miami Gardens’s climate, we typically combine sealing with source removal and sometimes evaporator coil cleaning to address the root cause. The 365-Day Done Right Promise covers our work if mold returns due to seal failure. Call (361) 326-5060 for a full assessment.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Miami Gardens since 2004.