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 South Bay
We dispatch crews to South Bay from our Miami office, and we’ve learned that homes here need a different approach than what works thirty minutes east on the coast. The lake humidity changes everything about how ductwork fails and how it gets fixed. If your ducts are leaking conditioned air into the attic or crawlspace, you’re not just losing money on your FPL bill. You’re pulling that heavy, mold-friendly air from around Lake Okeechobee straight into your living space. Call us at (361) 326-5060 for a free estimate. We’ll show up inside the window we quote, price the job in writing before we touch anything, and seal it by the book.
Why Hollis Air Duct Cleaning Is South Bay’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Duct Sealing team has handled enough South Bay homes to know the patterns. The concrete block construction on streets near South Bay Elementary, the wood-frame places off US-27 toward the lake, the retrofitted ductwork in mill-era homes near the old sugar processing district. Each setup leaks differently, and our technicians are trained to spot it fast.
Our phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no callback queues. When you schedule in South Bay, we commit to a window and we arrive inside it. Background-checked, uniformed technicians. Written price before any work starts. And every repair is covered by our 365-Day Done Right Promise. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. That’s The Garrison Standard, and it’s how we operate in South Bay and everywhere else we serve.
Air Duct Sealing in South Bay
Air Duct Sealing in South Bay means closing the gaps, cracks, and disconnected joints in your HVAC duct system so the air you paid to cool actually reaches your rooms instead of bleeding into your attic or crawlspace. In this market, we typically see whole-home duct sealing run between $1,200 and $2,800 depending on system size, accessibility, and how much of the original ductwork needs attention. Single-register repairs or spot-sealing in accessible areas start around $180-$340. We use professional-grade mastic sealant and metal-backed tape, not the hardware-store foil tape that peels off in South Bay’s humidity within a season.
When Sealing Beats Replacing
Many South Bay homes built during the sugar-mill expansion have ductwork that’s structurally sound but poorly sealed. If your ducts are metal or rigid fiberglass and intact, sealing restores efficiency without the cost of full replacement. Our technicians test airflow before and after so you see the difference.
The Lake Humidity Factor
South Bay’s position on Lake Okeechobee means ambient moisture stays high even when the temperature drops in January. Leaky return ducts pull that humid air directly into your system, overworking the coil and encouraging biological growth. Sealing the returns is often the most critical step in this climate.
Duct Sealing Services in South Bay
Duct Sealing Services in South Bay cover everything from pinpoint leak repair to full-system Aeroseal or manual mastic application across the entire network. Most South Bay homeowners call us after noticing hot rooms, musty odors that worsen after rain, or utility bills that climbed without explanation. A typical whole-home seal in this area runs $1,200-$2,800, with smaller spot repairs at $180-$340. We also handle Air Duct Cleaning in South Bay and Dryer Vent Cleaning in South Bay, and we often bundle cleaning with sealing since dirty ducts hide leaks and leaky ducts pull in new contamination.
Pressure Testing First
We start every job with a duct blaster or static pressure test to measure exactly how much air you’re losing. In South Bay’s older housing stock, we regularly find 25-35% leakage in systems that haven’t been touched since installation. The number goes on your invoice before we seal a thing.
Mastic vs. Tape in Humid Climates
Water-based duct mastic remains flexible after curing and bonds to metal and fiberglass in high humidity. We apply it with brushes and spatulas at every joint, collar, and penetration. Tape is used only as reinforcement on mastic, never as the primary seal. That’s the standard for lasting work in South Bay conditions.
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.
Trusted Brands We Service in South Bay
Our equipment roster includes Nikro negative-air machines for pre-seal cleaning, Honeywell filtration components we can integrate during the job, and Aprilaire whole-home dehumidifiers we often recommend for South Bay’s lake-adjacent climate. We stock sealants and reinforcement materials locally, so if your system needs something specific, we’re not waiting on a shipment from Miami while your house sits open. Abatement Technologies HEPA containment gear protects your home during the work. Every product is specified in your written quote, and every installation follows manufacturer guidelines under our 365-Day Done Right Promise.
Common Duct Sealing Problems We See in South Bay Homes
- Disconnected flex duct in crawlspaces. South Bay’s slab and pier foundations often leave flex duct exposed to ground moisture and rodent activity. The connections at the plenum and register boots work loose over time, dumping cooled air under the house instead of into it.
- Failed tape at metal joints. Original ductwork from the 1960s and 70s was sealed with cloth or foil tape that degrades fast in tropical humidity. We find powdery residue and wide gaps at every elbow and tee in older systems near the historic mill district.
- Leaky return pathways pulling attic air. Many South Bay homes have return chases framed into wall cavities that aren’t actually ducted. They suck hot, humid attic air straight into the air handler, overloading the system and spreading fiberglass particles.
- Condensation damage at uninsulated boots. When cold supply air hits the humid air leaking around a poorly sealed register boot, condensation forms inside the wall or ceiling. We see stained drywall and mold-friendly conditions in lake-facing homes off US-27 every rainy season.
Pricing for Duct Sealing in South Bay, FL
Whole-home duct sealing in South Bay typically runs $1,200-$2,800. Spot repairs and single-register sealing range from $180-$340. What moves you within those ranges: how many linear feet of duct we need to access, whether we can reach everything from the attic or need to cut into soffits or walls, and whether the system needs cleaning first to expose the leaks. Homes near the lake with crawlspace ductwork often cost more because access is tighter and moisture damage is more extensive. We give you one flat price per system, agreed in writing before we start. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for a free estimate. We’ll test your system, show you the leakage numbers, and quote the exact cost to fix it.
We Also Serve Cities Near South Bay
Our crews work throughout the western Palm Beach County agricultural communities. We regularly handle Duct Sealing in South Bay and surrounding areas including Belle Glade to the north, Pahokee along the lakeshore, Wellington to the east, and Royal Palm Beach. Each community has its own housing patterns and humidity challenges, and we adjust our approach accordingly.
Serving South Bay, FL - Our Local Coverage Area
We’re based in the South Bay 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 South Bay
We typically schedule South Bay appointments within 2-4 business days, and our Miami-based dispatch coordinates routes to keep arrival windows tight. Call (361) 326-5060 to check this week’s availability. Estimates are free.
Yes, we work throughout South Bay including the areas near South Bay Elementary, the US-27 corridor, and the residential streets toward the lakefront. The housing stock varies by block, and our technicians know the difference between mill-era construction and later builds.
We answer calls live 24 hours a day, and we prioritize situations where a disconnected or collapsed duct is making the home unlivable in summer heat. For standard sealing, we schedule within our normal 2-4 day window. Call (361) 326-5060 to discuss urgency.
South Bay pricing is comparable to Belle Glade and Pahokee, though lake-adjacent homes here sometimes need more extensive moisture remediation before sealing. Wellington and Royal Palm Beach tend to run higher due to larger average home sizes and more complex attic ductwork. Our written quote reflects your specific system, not your zip code.
Every duct sealing job is covered by our 365-Day Done Right Promise. If any sealed joint fails, any mastic cracks, or leakage returns above tested levels within one year, we come back and make it right at no charge, including a free second visit. The terms are written on every invoice, not implied. Call (361) 326-5060 with questions.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving South Bay since 2004.