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 The Hammocks
Duct sealing in The Hammocks typically runs $450 – $1,200 for a whole-home system, depending on how much of the original builder-grade flex duct needs repair before it can be sealed. Most jobs take four to six hours, and we write the price down before any work starts. If you’re in The Hammocks and your AC runs constantly but rooms stay uneven, the problem is usually not the unit. It’s air leaking into the attic through disconnected or dried-out duct joints. Call us at (361) 326-5060 for a free estimate.
We serve The Hammocks from our Miami office, and our crews know this subdivision’s housing stock inside out. Almost every home here was tract-built between the 1980s and 2000s, so entire blocks share the same failing builder-grade flex duct layouts, disconnected tees, and undersized returns – problems a crew learns in one house and finds again three doors down. That repetition means we diagnose faster and quote more accurately than an outfit that treats every job as a mystery.
Why Hollis Air Duct Cleaning Is The Hammocks’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004, and our Duct Sealing in The Hammocks work follows The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, leave the site clean. Our technicians are background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week – no voicemail loops.
The Hammocks homeowners call us back because we explain what we find. On a 1990s villa off SW 147th Avenue in the Hammocks, our tech ran a camera inspection through the supply and return ducts and found a crushed run pinched behind the air handler plus three fully disconnected flex tees dumping conditioned air into the attic. We reconnected the runs and sealed the joints with mastic, then verified with a manometer that static pressure at the blower motor dropped back into spec before we left. That’s the kind of accountability The Garrison Standard requires.
Every repair is backed by our 365-Day Done Right Promise. If the work fails within a year, we return and make it right at no charge, including a free second visit. The price is written down before we touch anything, and it does not move at the door.
Duct Repair in The Hammocks
Duct Repair in The Hammocks is almost always a prerequisite to effective sealing, because the original builder-grade flex duct installed in the 1980s and 1990s has reached the end of its service life. We find dried, cracked collars, crushed runs behind air handlers, and flex lines that have pulled completely free of the plenum. A typical duct repair in The Hammocks runs $350 – $800 for reconnecting and patching damaged sections, with full replacement of deteriorated flex runs adding $150 – $400 per line depending on attic access and length.
Crushed Runs and Disconnected Tees
The most common find in Hammocks attics is a flex duct run that has been pinched by storage boxes or pulled loose by decades of vibration. We reconnect the run, support it properly with strap hangers, and seal the joint with mastic – not foil tape, which dries and fails in South Florida heat. A manometer check confirms the repair restored design airflow before we leave.
Rotten Vapor Barriers
Year-round AC in The Hammocks humidity keeps the vapor barrier condensating, and that trapped moisture rots flex duct from the inside. The outer jacket looks intact, but the inner liner is powder. We cut out the damaged section and splice in new flex with a proper vapor barrier, then seal all joints. Sealing tape applied to rotten duct is a temporary fix that fails within months.
Air Duct Sealing in The Hammocks
Air Duct Sealing in The Hammocks addresses the conditioned air leaking into your attic through gaps at plenum connections, register boots, and seams in hard duct where the original mastic has dried and cracked. A typical whole-home sealing job in The Hammocks costs $450 – $1,200, with simpler partial-system repairs at the lower end and full attic resealing with multiple plenum repairs at the upper end. We use mastic and fiberglass mesh for permanent joints, and we verify our work with a duct blaster or manometer reading.
Mastic vs. Tape in Humid Attics
Foil tape fails in The Hammocks attics. The adhesive degrades in heat and humidity, and taped joints pop open within a season or two. We brush on water-based duct mastic, which remains flexible and bonds to metal, flex duct, and existing mastic. For large gaps we embed fiberglass mesh tape in the mastic for structural reinforcement. The result is a seal that lasts.
Post-Storm Moisture Protocol
After a hurricane or tropical storm, many homes in The Hammocks see water intrusion through roof vents and soffits that soaks attic insulation and ductwork. Sealing done before that wet insulation is corrected traps moisture and musty odor in the system. We inspect for saturated insulation, recommend its removal or replacement if needed, and only seal once the attic is dry. This step is skipped by crews in a hurry, and homeowners smell the difference for years.
Trusted Brands We Service in The Hammocks
Our Duct Sealing crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, and we stock filtration and sealing products from Honeywell, Aprilaire, and Guardsman for The Hammocks customers. That means no waiting on parts for a standard repair. If your system needs a specific register boot, plenum adapter, or inline filter housing, we likely have it on the van. For less common sizes in the older Hammocks homes, our Miami office maintains next-day parts access. The tools matter because the right brush system or negative-air machine lets us verify the seal after we apply it, not just hope it holds.
Common Duct Sealing Problems We See in The Hammocks Homes
- Original flex duct dried out at collars. The 1980s and 1990s builder-grade flex duct in The Hammocks has dried out and torn at the collar connections, so sealed joints pop back open. The duct has to be repaired, not just re-taped, or the seal fails again within a year.
- Undersized returns choking the blower. Tract builders in The Hammocks often installed return ducts barely adequate for the original system. Add-ons and upgrades have overloaded these returns, creating negative pressure that pulls attic air through every gap. We resize or add returns where possible, then seal.
- Condensation rotting duct from inside. South Florida’s year-round heat and humidity means AC systems run almost constantly, and the vapor barrier on old flex duct condensates where insulation has compressed. The tape has nothing solid to bond to. We replace compromised sections before sealing.
- Hurricane water intrusion soaking attic insulation. After a storm, water intrudes through roof vents and soffits and soaks the attic insulation around the ducts. Sealing over wet insulation traps moisture. We coordinate with insulation removal when needed, then seal dry ducts.
Pricing for Duct Sealing in The Hammocks, FL
A typical duct sealing job in The Hammocks runs $450 – $1,200 for a whole-home system. Partial repairs targeting specific problem areas start around $350. What moves the price: how many flex runs need replacement before they can be sealed, whether the plenum itself has separated from the air handler, attic accessibility, and whether we need to coordinate insulation removal after storm damage. We do not quote per-vent pricing, and we do not bait with a low number that jumps once we’re inside. The price is written down before any work starts, and it does not move at the door. Call (361) 326-5060 for a free estimate – we’ll inspect the system, explain what we find, and give you a flat price for the repair and seal.
We Also Serve Cities Near The Hammocks
Our crews travel throughout South Florida and beyond, and we regularly handle duct sealing in Jacksonville, Miami, Tampa, and Orlando. Each job follows The Garrison Standard: written price, written guarantee, background-checked uniformed technicians, and the 365-Day Done Right Promise. Wherever you are in our service area, the standard doesn’t change.
Serving The Hammocks, FL - Our Local Coverage Area
We’re based in the The Hammocks 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 The Hammocks
Cleaning removes dust and debris from inside the ducts, but it does not fix the gaps and disconnected joints that leak conditioned air into your attic. In The Hammocks, we find that most 1980s – 2000s homes have dried-out flex duct collars and disconnected tees that waste 20 – 30% of cooling energy before the air ever reaches the rooms. Sealing closes those gaps. Call (361) 326-5060 and we’ll inspect to tell you which problem you actually have.
We run a camera inspection through the supply and return ducts and take static pressure readings at the air handler. Disconnected runs show up as zero airflow at the register and pressure drops that don’t match the duct design. In The Hammocks, we know the typical builder layouts, so we know where to look first. Call (361) 326-5060 to schedule an inspection.
It can be, but it’s usually a moisture issue first. After a hurricane or tropical storm, water intrudes through roof vents and soffits and soaks attic insulation and ductwork. Sealing over wet ducts traps that moisture and odor in the system. We inspect for saturation, coordinate insulation removal if needed, dry the attic, then seal. Call (361) 326-5060 and we’ll determine the right sequence.
Yes. Our sealing methods, material specifications, and verification testing meet or exceed NADCA guidelines for residential duct sealing. We document static pressure before and after, use mastic rated for the application, and do not seal over wet or deteriorated duct material. The 365-Day Done Right Promise backs the work in writing. Call (361) 326-5060 for details on any specific job.
It will help significantly if your ducts are leaking, which they almost certainly are in a 1990s Hammocks tract home with original flex duct. We typically see 20 – 30% airflow recovery after proper sealing, which reduces runtime and lowers bills. But sealing won’t fix an undersized or failing AC unit, which is a separate evaluation. Call (361) 326-5060 and we’ll tell you honestly whether sealing is your best first step.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving The Hammocks since 2004 as part of the Garrison Partners family.