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 Treasure Island
We dispatch our crews to Treasure Island from our South Florida coordination office, and we’ve learned that every job here starts with the same question: how much salt damage are we dealing with? In a beach cottage off Gulf Boulevard or a low-lying home near Sunset Beach, duct sealing isn’t just about stopping air leaks. It’s about finding where the Gulf’s salt-laden humidity has already compromised the mastic, corroded the metal, or turned flex duct brittle in an unconditioned attic.
Our Duct Sealing team serves Treasure Island homeowners with the same standard we apply everywhere: arrive inside the quoted window, price the job in writing before touching anything, and leave the site clean. If you’re noticing uneven cooling, musty air from your vents, or utility bills that climb through the summer, call us at (361) 326-5060. We’ll send a uniformed, background-checked technician who understands Treasure Island’s specific conditions, not a generalist reading from a generic checklist.
Why Hollis Air Duct Cleaning Is Treasure Island’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our reputation in Treasure Island has been built one written guarantee at a time. Homeowners here know that duct work on a 1960s concrete-block cottage requires different judgment than sealing ducts in a modern suburban tract home, and our technicians are trained to make that distinction on every call.
Roy Castellanos leads this operation, and The Garrison Code he enforces is straightforward: show up squared away, explain what you’re finding in plain English, and never surprise a homeowner with a price they didn’t agree to in writing. Our 365-Day Done Right Promise covers every duct sealing job we complete in Treasure Island. If the seal fails, the leak returns, or the repair doesn’t hold, we come back and make it right at no charge. That includes a free second visit, not a negotiation.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule. When you’re dealing with salt-corroded ductwork and July humidity, that responsiveness matters.
Air Duct Sealing in Treasure Island
Air Duct Sealing in Treasure Island means addressing the unique damage pattern created by decades of Gulf Coast salt air meeting mid-century building materials. Most homes on the island were built between the 1940s and 1970s, when ductwork standards were minimal and attics were never designed to stay dry. We seal supply and return ducts using professional-grade mastic and reinforced tape rated for high-humidity environments, focusing on the joints, plenum connections, and duct boots where salt corrosion typically begins. A typical duct sealing job in Treasure Island runs $450 – $950 for a single-system home, depending on accessibility and the extent of corrosion we find.
What We Check First
Our technician starts with a full inspection of your duct runs, paying special attention to galvanized metal connections and early flex duct that have been exposed to salt air. We document every leak with before photos, then seal with mastic that flexes with temperature swings rather than cracking.
When Sealing Becomes Replacement
Sometimes the salt damage has progressed too far for sealing to be practical. If we find ductwork that’s rusted through or flex duct that’s disintegrated, we’ll show you exactly what we found and price replacement separately. No hidden costs, no pressure to proceed.
Duct Sealing Services in Treasure Island
Duct Sealing Services in Treasure Island cover everything from spot repairs on a single leaking joint to full-system sealing for homes where the original mastic has dried out and failed. We work on concrete-block cottages near John’s Pass, wood-frame homes on the southern end of the island, and everything in between. Our crews use Nikro negative-air equipment and professional sealing compounds from Abatement Technologies to ensure the repair holds up to the local climate. Most Treasure Island homeowners need duct sealing every 8 – 12 years, though homes closer to the beach or with unconditioned crawlspaces may need attention sooner.
Attic and Crawlspace Specialists
Most Treasure Island ductwork runs through spaces that hit 120°F in August and trap moisture year-round. We seal with materials rated for those conditions, and we check insulation condition while we’re there. Compromised duct insulation is often the real culprit behind high bills.
Post-Storm Inspections
After tropical weather, saltwater intrusion accelerates corrosion in duct boots and plenum connections. We offer post-storm duct assessments that focus specifically on salt damage, not just debris cleanup. If you’ve had flooding or even sustained onshore spray, it’s worth having us look.
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 Treasure Island
We stock sealing compounds, mastic, and reinforcement materials from Nikro, Honeywell, and Abatement Technologies, the same brands commercial crews rely on in high-humidity coastal environments. For Treasure Island homeowners, that means no waiting on special orders when we find corrosion during your appointment. Our trucks carry Aprilaire filtration products too, so if your duct sealing reveals that your air handler is pulling unfiltered Gulf air through gaps, we can address filtration at the same time. Every product we install is backed by manufacturer warranties plus our own 365-Day Done Right Promise.
Common Duct Sealing Problems We See in Treasure Island Homes
- Galvanized duct rust at plenum connections. The original metal duct in 1950s and 1960s cottages wasn’t designed for decades of salt air exposure. We find rust-through at the plenum that sends conditioned air straight into the attic, and we seal or replace depending on severity.
- Failed flex duct at boots. Early flex duct becomes brittle in Treasure Island’s heat and humidity, especially in unconditioned crawlspaces. The connection to the floor boot loosens, creating a leak that pulls musty crawlspace air into your living space.
- Dried mastic on original joints. Mastic applied in the 1970s has a finite lifespan, and the thermal cycling in a hot attic causes it to crack and flake. We remove the old material entirely and reseal with modern compounds rated for coastal conditions.
- Undersized returns pulling attic air. Many Treasure Island homes were built with returns too small for modern AC loads, creating negative pressure that draws hot, humid attic air through every gap. Sealing alone won’t fix this, but we’ll identify it and explain your options.
Pricing for Duct Sealing in Treasure Island, FL
Honest pricing means no surprises. In Treasure Island, duct sealing typically runs $450 – $950 for a single HVAC system in a standard beach cottage or small home. Larger homes with multiple systems, extensive crawlspace work, or significant corrosion repair may range from $1,100 – $1,800. What moves the number: how many duct runs need attention, whether we can access the attic or must work in a tight crawlspace, and whether we’re sealing existing metal or replacing sections of compromised flex duct.
We give you one flat price per system, agreed in writing, before any work starts. No per-vent pricing, no add-ons once the technician is inside. Every job includes before-and-after photos of your actual ductwork, so you see what was sealed and why. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Treasure Island
Our crews work throughout the region, and we regularly schedule appointments in Air Duct Cleaning in Treasure Island as well as Dryer Vent Cleaning in Treasure Island. If you’re in Jacksonville, Miami, Tampa, or Orlando and need the same standard of written pricing and guaranteed work, we serve those markets too. Each location operates independently under The Garrison Standard, with the same equipment, training, and 365-Day Done Right Promise.
Serving Treasure Island, FL - Our Local Coverage Area
We’re based in the Treasure Island 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 Treasure Island
We typically schedule Treasure Island appointments within 3 – 5 business days, and our South Florida coordination office routes crews efficiently to the island. Call (361) 326-5060 for the next available opening, or to get on our list if you need post-storm priority scheduling.
Yes, we work from the northern end near John’s Pass down through Sunset Beach and the mid-island residential streets off Gulf Boulevard. Every Treasure Island home gets the same written pricing and 365-Day Done Right Promise, whether it’s a 1940s cottage or a renovated condo.
Treasure Island pricing runs roughly 10 – 15% higher than inland Pinellas County due to accessibility, salt-corrosion severity, and the age of typical ductwork. We factor those conditions into our upfront quote, not as surprise add-ons.
We provide dated before-and-after photos of your specific ductwork, showing every sealed joint and the condition of surrounding metal. You’ll also feel the difference in even cooling and reduced humidity within 24 – 48 hours of the repair.
Our 365-Day Done Right Promise covers any seal failure, leak recurrence, or workmanship issue for a full year. If the repair fails, we return and make it right at no charge, including a free second visit. That’s backed in writing on every Hollis job, not a verbal assurance.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Treasure Island as part of the Garrison Partners family since 2004.