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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Lake Magdalene
Duct sealing in Lake Magdalene typically runs $400 – $900 for a whole-house system, and most jobs finish in a single visit. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our crews work Lake Magdalene regularly – from the ranch homes off Lake Magdalene Boulevard to the custom builds near the lake itself. Our Duct Sealing in Lake Magdalene service is built on The Garrison Standard: written price before we start, background-checked uniformed technicians, and a 365-Day Done Right Promise backed in writing. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Lake Magdalene’s Preferred Duct Sealing Company
We’ve been in business since 2004, and our reputation in Lake Magdalene comes from showing up inside the quoted window and pricing the job in writing before we touch anything. Homeowners here know the bait-and-switch routine – a low quote that doubles once the van is in the driveway. We don’t operate that way. The price we write down is the price you pay.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. And our 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 for someone to call you back.
We dispatch and schedule from our Miami office, but crews serve Lake Magdalene locally. That means we understand the specific headaches this area throws at ductwork: the pollen load from the oak canopy, the humidity spikes from afternoon thunderstorms, and the aging galvanized systems in the 1970s and 1980s ranch homes that make up so much of the local housing stock.
HVAC Duct Sealing in Lake Magdalene
HVAC Duct Sealing in Lake Magdalene means finding every leak, gap, and disconnected joint in your supply and return ductwork, then sealing them with mastic and specialized tape rated for Florida’s heat and humidity. Most Lake Magdalene homes need this work because the constant AC cycling – nine to ten months a year – pressurizes small leaks into major energy losses. A typical whole-house HVAC duct sealing job here runs $400 – $900, depending on system size and accessibility.
Our Duct Sealing team uses professional-grade equipment from Rotobrush and Nikro. We start with a pressure test to measure total leakage, then seal from the inside out with mastic where we can reach, and from the outside at joints and plenums. After sealing, we test again so you see the before-and-after numbers in writing.
When Sealing Beats Replacement
Not every leaky duct needs tearing out. In Lake Magdalene’s 1990s and 2000s custom homes with flex-duct systems, we often find that proper sealing and re-supporting of sagging runs restores airflow without the cost of full replacement. The key is honest assessment – we show you the camera footage and the pressure-test numbers, then price both options in writing.
Attic Ducts and Humidity Control
Lake Magdalene’s afternoon thunderstorms spike humidity fast, and unconditioned attics trap that moisture against ductwork. Sealing alone won’t fix condensation problems, but sealed ducts don’t pull as much humid attic air into the system. When we seal attic runs, we also check insulation levels and flag any flex duct that’s kinked or laying in low spots where water pools.
Duct Repair in Lake Magdalene
Duct Repair in Lake Magdalene covers the physical fixes that sealing alone can’t handle: crushed flex duct, rusted-out galvanized sections, disconnected collars at the air handler, and rodent damage in crawlspaces. Repair costs typically run $200 – $600 per section, with whole-system replacement reaching $1,500 – $3,500 for larger homes. We always price repairs separately from sealing so you know exactly what you’re paying for.
The housing stock here tells the story. Seventies and eighties ranch homes often have original galvanized ductwork that’s reached the end of its service life – rusted seams, undersized returns pulling crawlspace air, and decades of pollen buildup. Newer custom homes suffer from flex duct that wasn’t properly supported in attics, creating kinks and low spots where debris collects and moisture condenses.
Galvanized System Rehab
We don’t automatically condemn old galvanized ductwork. Where the metal is sound but seams have opened, we can seal and reinforce. Where sections have rusted through, we cut out the damaged portion and splice in new duct with proper transitions. Roy Castellanos, who leads Hollis Air Duct Cleaning, trains our crews to evaluate each system honestly – replace what’s dead, repair what can be saved.
Flex Duct Replacement and Support
Flex duct is cheap to install and expensive to fix wrong. In Lake Magdalene, we see too many attics where flex runs sag between joists, kink at turns, or lay directly on insulation where they trap heat and moisture. Our repairs include proper strapping and support to maintain manufacturer-specified bend radius – so the fix lasts.
Trusted Brands We Service in Lake Magdalene
We stock parts and filtration products from Honeywell, Aprilaire, and Guardsman for Lake Magdalene customers, which means faster turnaround on repairs and replacements. Our equipment roster also includes Rotobrush rotary brush systems and Nikro negative-air machines – the same tools commercial crews use, not hardware-store gear. When we seal or repair your ductwork, we can also upgrade your filtration if the system needs it, with products sized for your home’s airflow and the local pollen load.
Common Duct Sealing Problems We See in Lake Magdalene Homes
- Spring pollen overload on returns. Lake Magdalene’s oak-and-pine canopy drops yellow-green pollen in March and April that clogs return grilles within weeks. Sealed ductwork reduces the infiltration that pulls this pollen into wall cavities and attic spaces, but only if the return plenum and trunk joints are sealed with mastic, not just tape.
- Moisture-trapping flex duct in shaded attics. The same tree canopy that keeps attic ducts cooler in summer also traps moisture. We regularly find black mold blooms on flex duct collars near the air handler – sealing the connection properly and adding a supported replacement run fixes the source, not just the symptom.
- Undersized returns in 1970s ranch homes. Original systems were designed for less airflow than modern AC units demand. Leaky, undersized returns pull crawlspace and attic air into the system, pressurizing the house and driving up humidity. Sealing without addressing return sizing leaves the root problem intact.
- Outbuilding and detached garage pressure imbalances. Homes with workshops or guest cottages on the property often have longer supply runs that were never properly sealed. These create pressure imbalances that strain the blower motor and pull unconditioned – and unfiltered – air through the main house.
Pricing for Duct Sealing in Lake Magdalene, FL
A typical whole-house duct sealing in Lake Magdalene runs $400 – $900. Single-section repairs or partial sealing starts around $200. What moves the price: system size (more ducts, more labor), attic accessibility (tight crawlspaces take longer), and whether we find damage that needs repair before sealing makes sense.
We don’t do per-vent pricing or teaser coupons. We give one flat price per system, agreed in writing before work starts. That price includes the pressure test, the sealing work, and the post-test verification. If we find something unexpected – a disconnected trunk line, a rusted section that needs replacement – we stop, show you, and price it separately. No invoice surprises at the door.
Call (361) 326-5060 for a free estimate. We’ll ask about your home’s age, system type, and any symptoms you’ve noticed, then schedule a technician to test and price the job in person.
We Also Serve Cities Near Lake Magdalene
Our crews travel throughout the region for scheduled duct sealing and repair work. We regularly serve Lake Magdalene and surrounding communities including Jacksonville, Miami, Tampa, and Orlando. Dispatch and scheduling are coordinated from our Miami office, with local technicians assigned to each market.
Serving Lake Magdalene, FL - Our Local Coverage Area
We’re based in the Lake Magdalene 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 Lake Magdalene
Most Lake Magdalene homes need duct inspection every two to three years, with sealing, cleaning, or Lake Magdalene Dryer Vent Cleaning as needed. The combination of year-round AC, heavy spring pollen, and summer humidity means biological load builds faster here than in climates with a true winter shutdown. Homes on unpaved roads or with outbuildings may need annual checks. Call (361) 326-5060 and we’ll schedule a free assessment.
Sealing alone won’t kill existing mold, but proper sealing plus replacement of contaminated flex runs stops the moisture infiltration that feeds regrowth. In Lake Magdalene, we typically find mold on flex duct collars where attic humidity condenses on cool surfaces – sealing the connection and adding proper support eliminates the cold spot and the air leak. We include before-and-after photos of your own ducts so you see the difference.
Sometimes. If the galvanized metal is structurally sound and leaks are at seams and joints, mastic sealing can restore performance for years. If the metal is rusted through or the returns are undersized to the point of pulling crawlspace air, replacement is the honest recommendation. We show you the camera footage and price both paths in writing.
Yes, if they’re tied to the main HVAC system. Longer supply runs to outbuildings are often the leakiest part of the system, and they’re frequently ignored during main-house service. Unsealed outbuilding ducts create pressure imbalances that strain your blower and pull unfiltered air through the main house. We inspect and price these runs separately so nothing gets skipped.
The EPA ranks indoor air quality among the top five environmental health risks, noting that duct leakage can pull pollutants from attics, crawlspaces, and garages into living spaces. In Lake Magdalene’s climate, where AC runs constantly and outdoor pollen loads are extreme, leaky ducts don’t just waste energy – they concentrate allergens and mold spores inside the home. Sealing is the single most effective step after source removal.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Lake Magdalene since 2004.