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 Pine Castle
Duct sealing in Pine Castle typically runs $450 – $1,200 for a whole-home system, with most 1950s – 1970s ranches falling in the $600 – $900 range because of the plenum and retrofit work these older homes need. We’re the Duct Sealing crew that serves Pine Castle from our South Florida dispatch office, and we know these post-WWII block ranches off Pershing Avenue and around Lake Conway better than most. The original galvanized trunk lines, the flex-duct add-ons from the 1980s, the low attics where you can’t stand upright – our technicians work in these spaces weekly. Call (361) 326-5060 for a free written estimate before any work starts.
Why Hollis Air Duct Cleaning Is Pine Castle’s Preferred Duct Sealing Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and the 365-Day Done Right Promise backs every job in writing. Pine Castle homeowners aren’t looking for the cheapest flyer in the mailbox; they’re looking for a crew that shows up uniformed, prices it before touching anything, and doesn’t disappear when the musty smell comes back in three months. That’s The Garrison Standard.
Our technicians are background-checked and uniformed, and we stock parts for the brands these older systems run: Honeywell, Aprilaire, and other common controls you’ll find in Pine Castle utility rooms. Phones are answered by a live person 24 hours a day, 7 days a week – no callback queues, no “leave a message and we’ll get back to you Monday.”
We don’t just seal what’s easy to reach. In Pine Castle’s low-clearance attics, we seal the plenum boxes, the trunk-to-branch connections, and the crushed flex runs behind added-on utility rooms – the stuff that actually stops re-contamination. Other crews vacuum the visible ducts and leave the real leaks untouched.
Duct Repair in Pine Castle
Duct Repair in Pine Castle usually means fixing what decades of humidity, heat, and retrofitted add-ons have damaged: crushed flex connectors, disconnected branch runs, corroded galvanized trunks, and plenum boxes that have separated from their collars. Most repairs run $350 – $800 depending on how many runs need attention and whether we need to access tight attic spaces or behind utility-room walls. We price it in writing before starting, and the 365-Day Done Right Promise covers the repair for a full year – if it fails, we return at no charge, including a free second visit.
Crushed and Disconnected Flex Runs
On Pine Castle’s 1950s – 70s homes, central air was often added years after construction, with flex duct squeezed through block walls or run across hot attic floors. These flex lines get crushed by storage boxes, chewed by rodents, or pulled loose from their collars. We replace damaged sections with properly supported flex and seal the connections with mastic and mesh, not tape that’ll fail in the first summer.
Corroded Galvanized Trunk Lines
The original galvanized steel trunks in Pine Castle ranches corrode from the inside out where condensation collects. We cut out damaged sections, fabricate replacements, and seal the joints properly. This isn’t a patch job; it’s a repair that has to hold against 12 months of AC cycling in Central Florida humidity.
Air Duct Sealing in Pine Castle
Air Duct Sealing in Pine Castle is often the missing piece after a cleaning – because vacuuming dust out of leaky ducts just means new dust gets pulled in through the same gaps. We seal supply and return plenums, trunk-to-branch connections, register boots, and any accessible joints using mastic and reinforced mesh. A typical whole-home sealing in Pine Castle runs $450 – $1,200, with most post-WWII ranches at $600 – $900 because of the plenum work these homes need. We write the price down before we start, and it doesn’t move at the door.
Plenum Box Sealing
Here’s what we find constantly in Pine Castle: the main plenum box in the attic sits unsealed, with gaps where it meets the air handler and where branch ducts connect. Orlando’s humidity pulls through these gaps, mixing attic dust with conditioned air and baking it into that condensation-dust cake our techs see on camera. Sealing the plenum – not just wiping it down – is what breaks the cycle.
Mastic vs. Tape on Original Ductwork
Original galvanized duct in Pine Castle expands and contracts with every AC cycle, 365 days a year. Duct tape dries and fails; foil tape lifts at the edges. We use water-based mastic with fiberglass mesh, which flexes with the metal and stays sealed. It’s slower to apply. It costs more in labor. It actually works.
Trusted Brands We Service in Pine Castle
We carry parts and filtration products from Honeywell, Aprilaire, and Abatement Technologies – brands you’ll find in the utility rooms and attic installations throughout Pine Castle’s older housing stock. Honeywell media filters and Aprilaire whole-home units are common retrofits in these 1960s ranches, and we stock the replacement media and seal kits so we’re not ordering parts while your system sits open. Our equipment roster includes Nikro negative-air machines and Rotobrush rotary systems for the cleaning work that often precedes sealing, plus HEPA filtration that keeps the jobsite contained. When we seal a system, we do it with materials rated for the temperature swings and humidity these Pine Castle attics throw at them.
Common Duct Sealing Problems We See in Pine Castle Homes
- Unsealed plenum boxes in low attics. Pine Castle’s post-WWII ranches often have the main plenum sitting open in a 110-degree attic, pulling humid air and fine grit through gaps that are invisible from the living room. Vacuuming the ducts doesn’t touch this; sealing the plenum with mastic does.
- Crushed flex runs behind utility-room add-ons. When central AC was retrofitted into these older homes, flex duct was sometimes run through block walls or across attic floors with no support. We find these lines flattened or pulled loose, which makes any upstream sealing pointless until the run is repaired.
- Failed tape seals on original galvanized trunks. The original ductwork in Pine Castle’s 1950s – 70s homes moves with every cycle of the air handler. Tape dries out in the attic heat and falls off; we remove the old residue and seal with mastic that flexes with the metal.
- Return-side dust intrusion from sandy soil and storm debris. Central Florida’s sandy ground and summer thunderstorms blow fine grit that enters through poorly sealed return plenums and filter gaps. We seal the return path so the filtration system can actually do its job.
Pricing for Duct Sealing in Pine Castle, FL
A typical duct sealing job in Pine Castle runs $450 – $1,200 for a whole-home system. Most of the post-WWII ranches and small bungalows we work – concrete block homes with original or retrofitted ductwork – fall in the $600 – $900 range. What pushes a job toward the higher end: multiple unsealed plenum boxes, crushed flex runs that need repair before sealing, or systems where we need to work in extremely low-clearance attics common off Hansel Avenue and around the Lake Conway area.
We don’t quote per-vent or bait you with a low coupon that triples once we’re inside. We inspect the system with a camera, show you what we found, and write down one flat price per system before any work begins. That price includes all accessible sealing, plenum work, and the materials. If we find damage that requires repair before sealing can be effective, we explain it and price that separately – also in writing, also before we start.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Pine Castle
Hollis Air Duct Cleaning dispatches crews throughout Central and South Florida from our Miami office. We provide Duct Sealing in Pine Castle and surrounding communities including Jacksonville, Miami, Tampa, and Orlando. Each location operates independently under The Garrison Standard, with the same written pricing and 365-Day Done Right Promise.
Serving Pine Castle, FL - Our Local Coverage Area
We’re based in the Pine Castle 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 Pine Castle
Because the leaks that let dust and humidity in were never sealed. In Pine Castle’s older homes, we constantly find unsealed plenum boxes in hot attics where Orlando’s humidity pulls through gaps, mixes with attic dust, and bakes it onto the duct interior. Vacuuming removes the buildup; sealing the plenum and joints stops it from returning. Call (361) 326-5060 and we’ll camera-inspect to show you exactly where your system is pulling from.
Yes, if the smell is coming from humid attic air entering through leaky ducts. On a 1958 block ranch off Hansel Avenue, our tech found an open plenum box caked with humid attic dust; after cleaning, sealing, and reconnecting crushed runs with mastic and mesh, the homeowner reported the musty smell was gone within a week. Sealing stops the humidity intrusion that feeds mold and odor; cleaning alone doesn’t. Call (361) 326-5060 for a free inspection.
Our technicians work in the tight, low-clearance attics common in Pine Castle’s post-WWII housing stock – spaces where you often can’t stand upright. We bring portable lighting, knee pads, and the mastic and mesh we need; we don’t need to cut drywall unless there’s damage behind walls that we’ve shown you first. The job typically takes 3 – 5 hours for a whole-home system, and we leave the site clean. Call (361) 326-5060 to schedule and we’ll confirm access requirements for your specific home.
Not always, but in Pine Castle it usually should. The condensation-dust cake we find in unsealed plenum boxes can’t be sealed over effectively; it needs source removal first, then HEPA filtration, then sealing. We price cleaning and sealing separately in writing so you know what each costs and why both are needed. Call (361) 326-5060 for an inspection and we’ll tell you if your system needs both or just sealing.
If the ductwork is physically damaged – crushed flex, corroded galvanized sections, disconnected collars – sealing won’t hold and repair comes first. We camera-inspect every system before quoting; if we find damage, we show you the footage and price the repair separately, also in writing. The 365-Day Done Right Promise covers both repair and sealing work for a full year. Call (361) 326-5060 for an inspection and we’ll tell you exactly what your system needs.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Pine Castle and Central Florida since 2004.