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 Miami Gardens
Duct sealing in Miami Gardens typically runs $450 – $900 for a whole-home system, and in most of the ranch homes we work on, the job can be finished in a single day. The pricing depends on how many leaks our camera inspection finds, how much collapsed liner needs removal, and whether your air handler is accessible. We serve every part of Miami Gardens, from the grid streets off NW 27th Avenue to the newer townhome developments east of the Turnpike. Call (850) 660-3272 and you’ll reach a live person who can schedule a written quote.
If you’re living in a mid-century concrete-block home with the original flex ducts, you already know the signs: dust settling on furniture a day after you clean, bedrooms that never cool evenly, and a power bill that climbs every July. The problem is rarely the AC unit itself. It’s the duct system behind the walls and above the ceiling. Duct Sealing fixes exactly that.
Why Hollis Air Duct Miami Is Miami Gardens’s Preferred Duct Sealing Company
Miami Gardens homeowners call us because our crews understand what 50 years of subtropical humidity does to a duct system. We know the older sections west of NW 27th Avenue, where collapsed 1970s fiberglass liner sends particles into living spaces. We know the newer townhome complexes off Miami Gardens Drive, where shared risers require a different sealing protocol than a detached ranch. That local knowledge means we don’t guess. We inspect, we measure static pressure, and we seal what’s actually leaking.
Roy Castellanos leads our Miami Gardens crews. Every technician who walks through your door is background-checked, uniformed, and trained on Miami Gardens housing stock specifically. The price is written down before any work starts. If the seal fails within a year, our 365-Day Done Right Promise brings us back at no charge. That’s not a sales line. It’s in writing.
We started in 2004 as part of the Garrison Partners family. Since then, the standard has stayed the same: arrive inside the window, price in writing, do the work by the book, leave the site clean. Phones answered by a live person around the clock. No voicemail loops, no callback queues.
Styles & brands we work with
Duct Sealing Services in Miami Gardens
Duct Sealing Services in Miami Gardens mean one thing above all: stopping conditioned air from leaking into attics, wall cavities, and crawl spaces before it ever reaches your living room. In a typical mid-century ranch here, 20 – 30% of the air your AC produces escapes through gaps at duct joints, register boots, and the air handler connection. Our crews use camera inspection to map every breach, then apply a brush-on mastic sealant rated for the humidity load this climate puts on ductwork. The mastic cures to a durable, flexible seal that won’t crack the way hardware-store tape does.
Whole-Home Duct Sealing
We seal supply and return ducts from the air handler to the registers. That includes every joint, elbow, and boot. The job typically runs $450 – $700 in a ranch home, depending on how much accessibility your attic allows.
Leak Repair on Existing Sealed Ducts
If a previous sealing job has failed, the usual culprits in Miami Gardens are corrosion at the register boots and condensation-weakened tape. We clean the failed joint, re-apply mastic, and re-test. Targeted repair work usually falls between $150 – $400.
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 Miami Gardens
Duct Insulation in Miami Gardens matters because hot, humid attic air works constantly against the cool air moving through your ducts. Uninsulated or poorly insulated ducts lose cooling energy through the duct walls themselves, and in the summer that surface condensation soaks into the insulation and shortens its life. For a typical ranch home, wrapping exposed attic ducts in R-6 to R-8 insulation runs $500 – $1,100 depending on the linear footage and how much old insulation needs removal first.
Attic Duct Insulation
We remove degraded insulation, clean the duct exterior, and install new fiberglass or reflective wrap sized to the duct. The job includes insulating the plenum and boots, which are the most common condensation points in Miami Gardens homes.
Post-Sealing Insulation Replacement
After we seal a duct system, we often find old insulation that’s been saturated by years of humidity and needs to come out. Replacing it improves efficiency far beyond what sealing alone can do. Expect $300 – $700 for this add-on, quoted in writing before we start.
Trusted Brands We Service in Miami Gardens
Our crews work with professional-grade equipment from Rotobrush and Nikro, and we stock filtration and sealing products from Honeywell and Guardsman. What that means for a Miami Gardens homeowner is simple: the tools we use on your ducts are the same ones commercial building crews use, and the sealants we apply are rated for continuous high humidity. We keep parts and materials staged for Miami Gardens jobs, which means fewer delays when a job runs long or a register boot needs replacing. No hardware-store tape, no improvised fixes.
Common Duct Sealing Problems We See in Miami Gardens Homes
- Collapsed 1970s fiberglass liner shedding into living spaces. West of NW 27th Avenue especially, we regularly find the original liner inside flex ducts has broken down from decades of humidity. Once it collapses, it blocks airflow and blows particles through the registers. Sealing alone won’t fix it; the liner has to come out first, then the ducts get sealed and reinsulated.
- Register boots loosened by humidity-driven corrosion. Miami Gardens’ near-constant moisture attacks the metal collars where ducts connect to floor or ceiling registers. The joint corrodes, the boot works loose, and conditioned air leaks into the floor cavity. We clean the joint, re-seat the boot, and seal it with mastic.
- Condensation-degraded tape that separates within a few years. Homeowners who’ve had ducts “sealed” before sometimes find the tape has peeled away after two or three summers of afternoon thunderstorms. Tape can’t take the thermal cycling. We use brush-on mastic for that reason.
- Adhesive seal failures caused by residual liner dust. If a previous crew tried to seal over degraded fiberglass liner without removing the dust and debris, the sealant can’t bond. We clean the surface to bare material before applying anything. That extra step is the difference between a seal that lasts and one that fails inside a year.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Miami Gardens, FL
Most whole-home duct sealing in Miami Gardens lands between $450 and $900. Ranch homes on concrete slabs with attic-accessible ducts sit at the lower end. Two-story homes and townhomes with shared risers run higher because access is tighter. Duct insulation runs $500 – $1,100, and if collapsed liner removal is involved, add $200 – $400 for the remediation work before sealing begins. Every quote is written down before any work starts, and the number doesn’t move at the door. Call (850) 660-3272 for a free estimate.
We Also Serve Cities Near Miami Gardens
Hollis Air Duct Miami works throughout the surrounding area. Our crews serve Miami, Miami Beach, and Key Biscayne, and we know the housing stock in each. If you’re outside Miami Gardens proper, call (850) 660-3272 and we’ll confirm coverage for your neighborhood.
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
If your home still has its original flex ducts, have them inspected every 3 to 5 years. The combination of constant humidity and afternoon thunderstorms degrades seals and duct liner faster here than in drier climates. Any sign of dust returning quickly after cleaning, uneven room temperatures, or a jump in your electric bill is worth a camera inspection. Call (850) 660-3272 and we’ll schedule one at no charge.
Sealing helps indirectly. The primary mold driver in Miami Gardens ducts is humid air condensing inside leaky, uninsulated duct walls. Sealing stops the air exchange that feeds that condensation, and new insulation keeps duct surfaces warmer. But if mold is already established in the liner or on the duct interior, it must be removed or the liner replaced before sealing is meaningful. Our crews check for exactly that before we apply any sealant.
Yes. Townhome and apartment duct risers are harder to access, and the sealing protocol differs from a detached ranch home because you’re often working within a wall cavity shared with another unit. Our crews map the riser path, seal accessible joints from the unit side, and coordinate with building management when the riser itself needs work. The price runs higher than a ranch home because access takes longer, typically $600 – $1,200 depending on the building.
It will, but only if the degraded liner is removed first. The homes west of NW 27th Avenue often have 1970s flex ducts with fiberglass liner that’s collapsed and shedding into the airstream. Sealing the duct joints won’t stop the liner from breaking apart. Our crews use camera inspection to identify collapsed sections, remove the loose liner, then seal and reinsulate. After that, the dust from the liner stops. Call (850) 660-3272 for a camera inspection.
Most Miami Gardens homeowners see 15 – 30% lower cooling bills after a proper seal and reinsulation job, especially in ranch homes where 20 – 30% of conditioned air was leaking into the attic. The biggest savings show up in July, August, and September, when the attic heat load is highest. But the number depends on how much was leaking before and how well the seal holds. Our 365-Day Done Right Promise covers that second part in writing.
Last month we sealed the supply and return ducts in a mid-century ranch off NW 31st Avenue, where collapsed 1970s fiberglass liner was blowing debris through the registers. Our techs used a camera inspection to map the breaches, removed the loose liner, and applied duct sealant plus new insulation. Afterward static pressure at the air handler returned to normal and the blower motor stopped overworking. That’s the difference between guessing and doing the job by the book.
Get a Free Written Quote for Duct Sealing in Miami Gardens
If your Miami Gardens home still has original flex ducts, or if you’re seeing dust you can’t explain, call us. We’ll send a background-checked, uniformed technician to inspect the system, show you the breaches on camera, and hand you a written price before any work begins. No pressure, no moving targets, no tape over rusted metal. If the seal fails within a year, we return at no charge under the 365-Day Done Right Promise. Call (850) 660-3272 today and speak to a live person.
Written by Roy Castellanos, Owner at Hollis Air Duct Miami, serving Miami Gardens and surrounding South Florida communities.