Duct Sealing in Kendall - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Kendall

Duct sealing in Kendall typically runs $450 – $1,200 per air handler depending on system accessibility and whether the original flex duct needs partial replacement, and most multi-system homes here need two or three separate scopes quoted and documented individually. We’re the Duct Sealing crew for Hollis Air Duct Cleaning, dispatching from our Miami office to serve Kendall homes with the same written pricing and 365-Day Done Right Promise we’ve operated under since 2004. Call (361) 326-5060 for a free estimate, or read on to understand why Kendall’s 1990s-era flex duct and 140°F attics make this work different here than in drier climates.

Call (361) 326-5060

Kendall sprawls west from Dadeland through The Hammocks and down toward Zoo Miami, and we’ve sealed ducts in just about every subdivision built between the late 1970s and the 2000s housing boom. The homes are large. The attics are brutal. The AC runs nine or ten months straight. That combination means duct sealing here isn’t a quick mastic-and-tape job, it’s diagnostic work that often reveals torn vapor barriers, sagging flex runs, and return-side leaks pulling 140°F attic air straight into the system. We price it per air handler so you know exactly what each system costs before we start, and we document everything with before/after photos because you can’t climb into the attic to check our work.

Why Hollis Air Duct Cleaning Is Kendall’s Preferred Duct Sealing Company

We’ve been part of the Garrison Partners family since 2004, and our Miami office dispatches crews to Kendall daily. That matters because a technician who knows the difference between a 1980s Pinecrest home with metal duct and a 1998 Hammocks build with R-4 flex isn’t guessing at what they’ll find in the attic. They’re bringing the right materials, the right expectations, and the right documentation.

Our technicians are background-checked and uniformed, and they work under The Garrison Standard: arrive inside the quoted window, price in writing before touching anything, complete the job by the book, and leave the site clean. The 365-Day Done Right Promise covers every duct sealing job in writing. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.

Phones are answered by a live person 24 hours a day, seven days a week. When you call (361) 326-5060, you talk to a human who can schedule your Kendall appointment, not a callback queue that dumps you into voicemail.

Duct Sealing Services in Kendall

Duct Sealing Services in Kendall address the specific failure modes of South Florida’s original flex duct systems: torn outer jackets, separated plenum connections, and register boots that have pulled away from drywall due to decades of thermal expansion in 140°F attics. A proper sealing job here starts with a camera inspection of the full duct run, then source removal of any biological growth, followed by mechanical sealing of accessible joints using mastic and reinforced foil tape, and finally static pressure testing to verify the system is pulling conditioned air from the right places, not sucking 140°F attic air through return-side gaps.

Most Kendall homes built between 1990 and 2005 have two or three air handlers, often with independent attic flex runs that don’t interconnect. We quote and document each system separately so you understand what each handler costs and what was done to it. Typical per-system sealing in Kendall runs $450 – $850 for accessible single-story runs, $700 – $1,200 for multi-story or obstructed attics where partial replacement of failed flex sections is required.

Camera Inspection and Static Pressure Testing

We run a borescope through the full duct run before quoting any sealing work. You see what we see: torn vapor barriers, disconnected boots, gaps at the plenum. After sealing, we take static pressure readings on each system and compare them to manufacturer specs. The numbers don’t lie, and you get a copy.

Mastic Sealing and Reinforced Tape Application

We use duct sealing mastic, a water-based compound that remains flexible after curing, applied over reinforced foil tape at all joints and seams. On Kendall’s original flex duct with degraded R-4 or R-6 insulation, mastic alone isn’t enough if the outer jacket is torn, we flag those sections for replacement rather than covering them up.

Duct Insulation in Kendall

Duct Insulation in Kendall is often the missing half of a sealing job. South Florida code now requires R-6 minimum on new ductwork, but much of Kendall’s 1980s – 2000s housing stock was built with R-4 flex that has compressed, torn, or grown mold-like staining in the attic humidity. Re-insulating after sealing prevents the new seal from sweating condensation onto attic insulation, which is the root cause of “wet duct syndrome” we see repeatedly in homes off SW 137th Avenue and throughout The Hammocks.

Insulation replacement on Kendall flex duct runs typically adds $200 – $400 per system to the sealing scope, depending on linear footage and whether the attic access allows for full replacement or requires sectional repair. We use professional-grade insulation products from Abatement Technologies and Guardsman, specified to the R-value and vapor barrier rating appropriate for South Florida’s 70 – 90% relative humidity.

Vapor Barrier Replacement

The outer jacket on original Kendall flex duct often tears first, exposing the fiberglass insulation to attic moisture. We replace failed sections with new flex that includes an intact vapor barrier, then seal all connections with mastic. Without this step, condensation drips onto attic insulation and the homeowner calls back six months later with the same damp spots.

Attic Insulation Assessment

When duct condensation has saturated the attic insulation beneath the trunk line, we document it with photos and recommend remediation. Sealing the duct without addressing wet insulation just moves the moisture problem to another surface. We show you what we found and let you decide on next steps.

Trusted Brands We Service in Kendall

Our crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same negative-air machines and rotary brush systems used in commercial HVAC remediation. For filtration and insulation products, we stock Honeywell, Aprilaire, and Guardsman materials appropriate to South Florida’s humidity load. Because we dispatch from our Miami office, parts turnaround for Kendall jobs is same-day or next-day on standard items, no waiting on freight from out of state. When we quote a sealing job that includes partial flex replacement, we specify the brand and R-value of the replacement duct in writing, so you know exactly what goes into your attic.

Common Duct Sealing Problems We See in Kendall Homes

• “Wet duct syndrome” from torn vapor barriers. In Kendall’s 140°F attics, the AC runs constantly and the temperature differential between conditioned air and attic air creates condensation on any duct with a compromised outer jacket. We regularly find flex runs in 1990s-era homes near Kendall Drive where the insulation is soaked and the attic drywall below is stained.
• Multi-system homes quoted as single-scope jobs. A home with three air handlers needs three separate inspections, three separate documentation packages, and three separate static pressure tests. Quoting it as one lump sum almost always leads to uncovered scope, surprise charges, or systems that get skipped entirely.
• Supply-side-only sealing with ignored return leaks. The return side pulls unconditioned attic air into the system, raising humidity and energy use. In Kendall’s year-round cooling climate, an unsealed return boot in a 140°F attic is like leaving a window open all summer.
• Mastic applied over mold-like growth without source removal. Sealing traps moisture and biological material inside the duct. We remove the source first, then seal, then verify with post-cleaning inspection. Anything less fails within one humid season.

Pricing for Duct Sealing in Kendall, FL

We Also Serve Cities Near Kendall

Our Miami office dispatches crews throughout South Florida and across the state. We provide Duct Sealing in Kendall and also serve Jacksonville, Miami, Tampa, and Orlando with the same written pricing, background-checked technicians, and 365-Day Done Right Promise. Each market has its own local conditions, its own housing stock, and its own pricing, we don’t paste the same scope onto every city.

FAQs About Duct Sealing in Kendall