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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After
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Before
AfterFast, Reliable Duct Sealing Across East Lake
We dispatch to East Lake from our Miami office, and crews are typically on-site within a day or two of your call. If you’re smelling musty air when the AC kicks on, especially after summer away, that’s often a sign your ductwork is pulling humid attic air through gaps and cracks. In East Lake, where Gulf humidity sits heavy and lakefront homes see seasonal vacancy, duct sealing isn’t just about comfort. It’s about stopping moisture and microbial growth before it spreads through your system. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is East Lake’s Preferred Duct Sealing Company
We’ve worked in East Lake long enough to know the pattern. A homeowner in East Lake Woodlands calls in October after three months away. The AC starts, and the whole house smells like a damp closet. We’ve seen it dozens of times. Our Duct Sealing team knows the local housing stock: 1980s and 90s builds with duct board in the attic, flex runs that sag in the heat, and the specific way Florida humidity finds every gap.
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. Every job gets a written price before we touch anything, and our 365-Day Done Right Promise means if the seal fails or the smell comes back, we return at no charge. Technicians are background-checked and uniformed. Phones are answered by a live person, 24 hours a day. No voicemail loops, no waiting until Monday for a callback.
Air Duct Sealing in East Lake
Air Duct Sealing in East Lake means finding every gap, joint, and transition in your ductwork and closing it with mastic and mesh so conditioned air stays inside and humid attic air stays out. In this market, a typical whole-house seal runs $850 – $1,800 depending on system size, attic accessibility, and how much of the original duct board needs attention. Homes built in the 1980s and 90s with attic flex duct often run higher because we need to address crushed or disconnected runs before sealing makes sense.
You’ll know you need it when rooms stay humid even when the AC runs constantly, or when your energy bill climbs without explanation. In East Lake’s subtropical climate, unsealed ducts pull in pollen from oak and pine trees, plus enough humidity to keep microbial growth alive year-round.
What We Seal and Why
We focus on the joints where flex duct meets the air handler, the transitions between duct board and metal plenums, and any penetration where wiring or refrigerant lines pass through. These are the failure points in East Lake’s older housing stock. We don’t just caulk the obvious gaps. We pressurize the system and use a camera to find the ones you can’t see from the attic hatch.
The Camera Inspection First
Before we seal anything, we run a camera. In East Lake, we’ve found disconnected flex duct buried in insulation, gaps behind the blower motor pulling attic air straight into the return, and duct board so saturated with moisture that sealing it would trap the problem inside. The camera shows us what we’re dealing with so we price it honestly and fix it completely.
Duct Sealing Services in East Lake
Duct Sealing Services in East Lake cover the full scope: inspection, source removal of any contaminated material, mechanical agitation under negative pressure, then sealing with mastic and reinforced mesh. For a typical 2,000-square-foot home in neighborhoods like East Lake Woodlands or the gated communities along East Lake Road, expect $850 – $1,400 for sealing alone. If we need to replace degraded duct board or reconnect crushed flex runs first, that can push the total toward $1,800.
We don’t quote per-vent pricing. That’s a bait-and-switch setup. We quote one flat price per system, agreed in writing before work starts. What we quote is what you pay.
Negative-Air Containment During Work
While we seal, we run a Nikro negative-air machine to keep any disturbed debris from entering your living space. This matters in East Lake, where pollen loads are high and attic dust can carry mold spores. The machine pulls air out of the work zone through HEPA filtration, so what we disturb in the attic doesn’t settle in your bedrooms.
Mastic and Mesh, Not Tape Alone
We seal with mastic compound and fiberglass mesh, not foil tape. Tape fails in Florida attic heat. Mastic stays flexible, fills irregular gaps, and bonds to duct board, metal, and flex duct. We apply it with a brush at every joint, then overlay mesh at stress points. In East Lake’s humidity, this is the only method that holds up long-term.
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 East Lake
We stock parts and filtration products from Aprilaire, Abatement Technologies, and Guardsman so East Lake customers don’t wait on shipping. Our rotary brush systems from Rotobrush handle the mechanical agitation phase, and our Nikro negative-air machines contain debris during the job. If your system needs upgraded filtration after sealing, we can install Aprilaire media filters or Guardsman UV components on the same visit. Parts are on the truck, so most jobs finish in one day without a return trip.
Common Duct Sealing Problems We See in East Lake Homes
- Moldy duct board sealed over without source removal. Some companies spray a fogging “sanitiser” and call it clean. The mold stays in the porous duct board, the smell returns within weeks, and the new sealant traps moisture against the surface. We remove contaminated sections before we seal anything.
- Crushed or disconnected flex duct ignored. Florida heat cycling degrades flex runs over years. We’ve found ducts flattened under insulation, completely detached from plenums, or pulling 120-degree attic air straight into the supply. Sealing the joints while missing these failures wastes your money.
- No pressure test after sealing. Without a post-job pressure test and camera pass, hidden gaps near the air handler or blower motor keep leaking. We verify our work so you know the seal held before we pack up.
- Snowbird vacancy pattern hiding slow mold growth. In East Lake’s lakefront communities, homes sit empty through summer. Mold colonizes ductwork in the stagnant, humid air. The first sign is that musty blast when the AC restarts in fall. We address the moisture source and the duct leaks together, or the problem repeats next season.
Pricing for Duct Sealing in East Lake, FL
A typical duct sealing job in East Lake runs $850 – $1,800 for a complete residential system. Smaller homes with straightforward attic access and intact flex duct start near the bottom. Larger homes, degraded duct board, or multiple disconnected runs push toward the higher end. We don’t do per-vent pricing, and we don’t bait you with a low coupon that doubles once we’re inside. The price is written down before any work starts, and it does not move at the door.
What affects your price: system size (number of air handlers and total duct length), attic accessibility, condition of existing duct board and flex, and whether we need to remove contaminated material before sealing. Every estimate is free. Call (361) 326-5060 and we’ll schedule a look.
We Also Serve Cities Near East Lake
Our crews work throughout the region, and we regularly handle Duct Sealing in East Lake along with jobs in Jacksonville, Miami, Tampa, and Orlando. Scheduling is coordinated from our Miami office, with local technicians dispatched to your area.
Serving East Lake, FL - Our Local Coverage Area
We’re based in the East Lake 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 East Lake
The musty smell is almost always mold in your ductwork, and in East Lake it’s tied to the snowbird vacancy pattern. When a home sits empty through summer, humidity stays high and air stagnates in the ducts. Mold colonizes the duct board and flex runs. When you return and restart the AC, the first cooling cycle pushes that stagnant, microbial-laden air through every vent. We find the contaminated section with a camera, remove the source under negative pressure, then seal the system so humid attic air can’t reintroduce moisture. Call (361) 326-5060 for a free inspection.
It helps, but only if the mold source is removed first. Sealing alone won’t kill existing mold. What sealing does is stop the continuous infiltration of humid attic air that keeps mold alive and growing. In East Lake’s climate, unsealed ducts pull in Gulf moisture all summer. Seal the gaps, and you cut off the humidity supply. We always inspect for active contamination before we seal, because sealing over mold traps the problem. Call (361) 326-5060 and we’ll tell you honestly whether sealing alone will solve your issue.
Duct sealing closes physical gaps with mastic and mesh so conditioned air stays in and unconditioned air stays out. Fogging sprays a chemical mist into the ducts and does nothing to fix leaks. In East Lake’s humidity, fogging over moldy duct board is worse than useless: the chemical evaporates, the mold remains in the porous material, and the untouched gaps keep pulling in humid air. We don’t sell fogging as a substitute for sealing. If your ducts are contaminated, we remove the source mechanically. Then we seal. Call (361) 326-5060 for an honest assessment of what your system actually needs.
Yes, if the duct board is structurally intact and not heavily contaminated. 1990s East Lake builds used duct board that degrades in Florida attic heat but can often be sealed effectively if caught before advanced moisture damage. We camera-inspect first. If the board is crumbling or has visible mold penetration, we’ll tell you straight that replacement makes more sense than sealing. If it’s sound but leaky at joints and transitions, mastic sealing extends its life significantly and improves efficiency immediately. Call (361) 326-5060 for a camera inspection and honest recommendation.
We pressure-test the system and run a final camera pass before we leave. The pressure test measures how much air your ducts leak to the attic; after sealing, that number should drop substantially. The camera confirms no visible gaps remain at joints, transitions, or penetrations. We show you the before and after images. If the pressure test doesn’t pass, we find the remaining leak and fix it before we invoice. Our 365-Day Done Right Promise covers the seal for a full year; if it fails, we return at no charge. Call (361) 326-5060 to schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving East Lake and the greater Tampa Bay area.