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 Tamiami
Most Tamiami homeowners call us after their energy bill jumps 20% or more and the back bedrooms never cool down. Duct sealing in Tamiami typically runs $850 – $1,800 for a whole-house seal on a standard 1,500 – 2,500 square foot home, and we price it in writing before any work starts. Our crews dispatch from our Miami South FL office and serve Tamiami directly, so we’re familiar with the slab-on-grade construction, original 1980s flex duct, and flat-lot drainage that define homes here. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Tamiami’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Duct Sealing in Tamiami work follows The Garrison Standard: arrive inside the window, price in writing, complete the job by the book, leave the site clean. Tamiami homeowners know the difference between a crew that understands local conditions and one that’s reading from a generic checklist. Our technicians are background-checked and uniformed; you know who’s walking into your home before they arrive. Phones are answered by a live person 24 hours a day, 7 days a week, no voicemail loops. 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.
Duct Sealing Services in Tamiami
Duct Sealing Services in Tamiami start with understanding that this is often a moisture-control job before it’s an efficiency job. Slab-on-grade homes here sit on a high water table, so after heavy summer rains our techs routinely find water pooled in attic duct pans or around the air handler. Unsealed joints pull that damp attic air straight into your supply and return ducts. We seal plenum seams, collar connections, and flex-duct junctions with mastic and mesh, not tape alone. A typical whole-house duct sealing in Tamiami runs $850 – $1,400 for accessible attic systems, while homes with extensive crawlspace work or multiple air handlers can reach $1,600 – $1,800. We always check moisture conditions first; sealing leaks without addressing standing water just traps the problem inside.
Leak Detection and Static Testing
We pressurize your duct system and measure airflow loss at the air handler and each register. In Tamiami’s older ranch homes off SW 8th Street and surrounding areas, we regularly find 25 – 35% air loss through degraded collar seals and torn vapor barriers on original flex duct. The test gives us a baseline and shows you exactly where your conditioned air is escaping.
Mastic Sealing with Reinforced Mesh
Tamiami’s year-round humidity and attic heat cycles peel pressure-sensitive tape off within a single rainy season. We apply duct sealing mastic, a thick water-based compound, reinforced with fiberglass mesh at all joints and seams. This creates a flexible, permanent seal that moves with the ductwork as temperatures swing between 95°F attic afternoons and 72°F conditioned air inside.
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 Tamiami
Duct Insulation in Tamiami addresses what happens after sealing: cold supply air running through unconditioned attic spaces hits 90°F+ ambient temperatures and sweats on the outside of the duct. That condensation drips onto ceiling drywall, breeds mold, and undoes the efficiency gains you just paid for. We wrap sealed ducts in new insulation with intact vapor barriers, typically R-6 or R-8 rated for our climate. Duct insulation as a standalone service in Tamiami runs $600 – $1,200 depending on linear footage and attic accessibility; combined with sealing, most homeowners see $1,400 – $2,400 for the full package. This is especially critical in Tamiami’s Mediterranean-revival and 1970s – 1990s ranch homes where ductwork runs through unconditioned attics under tile or flat roofs.
Vapor Barrier Replacement
Original flex duct in Tamiami homes often has a torn or brittle outer vapor barrier from years of heat and humidity exposure. We assess whether the inner insulation is salvageable or if section replacement makes more sense than wrapping over damage. Our crews carry the materials to do either on the same visit.
Attic Moisture Barriers
In homes where the air handler pan repeatedly holds water after storms, we may recommend a secondary drain pan with float switch or improved condensate line routing. This isn’t duct sealing strictly speaking, but in Tamiami it’s often the difference between a lasting repair and a callback.
Trusted Brands We Service in Tamiami
Our Duct Sealing crews work with professional-grade equipment from Nikro negative-air machines, Honeywell filtration components, and Aprilaire humidity control products. We stock mastic, mesh, and insulation materials sized for the flex-duct systems common in Tamiami’s 1970s – 1990s housing stock, so most jobs don’t wait on parts. When a section of duct needs replacement rather than sealing, we source compatible fittings for the original system rather than forcing mismatched components. Fast turnaround matters here because once you’ve had standing water in your attic ductwork, every day of delay is another day of microbial growth.
Common Duct Sealing Problems We See in Tamiami Homes
- Waterlogged flex duct sealed without drying first. Sealing joints on flex duct that’s already saturated from a pan overflow traps moisture inside the system. The seal holds, but mold keeps feeding on condensation in the unconditioned attic, and the musty odor returns within weeks.
- Tape-only patches on collars and plenum seams. Tamiami’s humidity and heat cycling peels pressure-sensitive tape off fast. We remove old tape residue and apply mastic with mesh for a permanent repair that survives our climate.
- Supply and return imbalance after sealing. Tightening a leaky system in a slab-on-grade Tamiami home can starve the blower motor of return air, raising static pressure and cutting airflow to far registers. We test and balance after every seal.
- Skipped moisture checks after storm events. Sealing an air handler pan that’s still holding water from flat-lot drainage backup traps humidity inside newly tightened ductwork. We verify pans are dry and drains are clear before we seal.
Pricing for Duct Sealing in Tamiami, FL
Whole-house duct sealing in Tamiami runs $850 – $1,400 for standard attic systems with single air handlers. Homes with multiple zones, extensive crawlspace ductwork, or hard-to-access flat-roof attics typically fall in the $1,600 – $1,800 range. Duct insulation adds $600 – $1,200 depending on linear footage. What moves the price: accessibility (crawlspace vs. walk-up attic), linear footage of ductwork, number of air handlers and plenums, and whether sections need replacement rather than sealing. We give you one flat price per system, agreed in writing before work starts. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for a free estimate; we’ll inspect your system and email a written quote you can review without pressure.
We Also Serve Cities Near Tamiami
Hollis Air Duct Cleaning dispatches crews throughout South Florida and beyond. We also provide duct sealing in Jacksonville, Miami, Tampa, and Orlando with the same written pricing and 365-Day Done Right Promise on every job.
Serving Tamiami, FL - Our Local Coverage Area
We’re based in the Tamiami 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 Tamiami
In Tamiami, we recommend inspecting and resealing every 2 – 3 years, versus 5 – 7 years in drier climates. The combination of high humidity, frequent storms, and attic heat cycling degrades seals faster here. Call (361) 326-5060 to schedule an inspection and we’ll show you what’s actually happening in your system.
The odor returns because cleaning removes mold but doesn’t stop the moisture source. After heavy rain, water pools in attic duct pans or around air handlers on Tamiami’s flat lots with high water tables; unsealed joints pull that damp air straight into your ducts. Sealing without a moisture check traps the problem inside. We dry the pan, clear the drain, then seal with mastic and mesh so the smell stays gone.
It helps only when paired with moisture control. Sealing prevents damp attic air from entering the system, but if your air handler pan is holding water or your flex duct vapor barrier is torn, sealing alone won’t stop condensation that breeds mold. We check both conditions first and address them as part of the job.
We inspect the outer vapor barrier for tears, test static pressure to find leaks, dry any standing water in pans or lines, then seal plenum seams and collar connections with mastic and reinforced mesh. If the flex duct itself is degraded, we replace sections rather than seal over damage. The goal is a tight system that doesn’t pull humid attic air into your living space.
It can if the sealing is done without testing supply and return balance. Tightening a leaky system raises static pressure; if your return air is already restricted, the blower works harder and airflow to distant rooms drops further. We measure before and after, and we’ll tell you if your ductwork is undersized or if a return air modification is needed before sealing.
Ready to stop losing conditioned air and paying for it on your FPL bill? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate on duct sealing in Tamiami. We’ll inspect your system, show you exactly where the leaks are, and give you a written price before any work starts. Every job is backed by our 365-Day Done Right Promise: if it’s not right, we make it right, including a free return visit.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Tamiami since 2004 as part of the Garrison Partners family.