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 Winter Park
Duct sealing in Winter Park typically runs $450 – $1,200 for a whole-home seal, with most historic homes falling in the $650 – $950 range depending on whether we’re working with original galvanized runs or retrofitted flex duct. We’re familiar with the specific challenges of Winter Park’s housing stock, from the 1880s Victorians along Park Avenue to the mid-century ranches in Orwin Manor, and we dispatch crews to Winter Park from our Miami coordination office with scheduling windows that respect your time. We also offer Winter Park Dryer Vent Cleaning for comprehensive home safety. If your upstairs rooms won’t hold temperature or your energy bills have climbed without explanation, crushed or separated ductwork is often the culprit. Call (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Winter Park’s Preferred Duct Sealing Company
We’ve been sealing ducts in Central Florida since 2004 as part of the Garrison Partners family, and our Duct Sealing in Winter Park crew understands the difference between a standard flex-duct seal and the preservation work these historic homes require. Winter Park customers tell us they chose Hollis because we show up uniformed, inside the window, and don’t rewrite the price at the door. Our 365-Day Done Right Promise covers every seal in writing, if a joint fails or a register starts whistling within a year, we come back at no charge, including a free second visit. Phones are answered by a live person 24 hours a day, 7 days a week, no voicemail loops when you’re trying to schedule around a closing or a seasonal rental turnover.
HVAC Duct Sealing in Winter Park
HVAC Duct Sealing in Winter Park means closing the gaps, separations, and crush points that let conditioned air escape before it reaches your rooms. In this market, we’re often applying mastic and mesh to original galvanized or clay runs in homes built before 1950, where decades of corrosion have opened joints behind plaster walls that can’t be disturbed. A typical whole-home seal in Winter Park runs $450 – $1,200, with simpler flex-duct jobs in newer construction at the lower end and historic-home preservation work at the higher end.
Sealing Behind Original Plaster
When we encounter a retrofit duct run buried in a load-bearing plaster wall, we can’t simply tear it open. We use camera inspection to locate the leak, then apply sealant through existing access points or carefully created minimal openings. The mastic we use is rated for the temperature swings these old metal runs experience, and we match the mesh to the substrate, fiberglass for flex, metal for galvanized.
Rebalancing After the Seal
A sealed duct system changes airflow dynamics. We measure static pressure at the air handler and adjust register dampers so each room gets its designed CFM. In Winter Park’s two-story Mediterranean Revivals, this step is what finally cools the upstairs bedrooms that have been stuffy since the original installation.
Duct Repair in Winter Park
Duct Repair in Winter Park addresses the physical damage that sealing alone won’t fix, crushed trunks, disconnected branches, corroded sections that have rusted through, and flex duct that has degraded in hot attics. Repair costs here typically range from $280 for a single flex-duct replacement to $1,800 for extensive galvanized trunk reconstruction in a historic home. We always inspect with a camera before quoting, so the price reflects what we actually found, not what we guessed.
Galvanized Trunk Reconstruction
When original metal duct has corroded through at the bottom of a low spot where condensation collected for decades, we fabricate a replacement section from matching gauge steel, seal it with mastic, and support it properly so the new work outlasts what it replaced. This is common in the 1920s homes near the Winter Park Country Club.
Flex Duct Replacement in Tight Spaces
In Orwin Manor’s mid-century ranches, flex duct was often crammed through attic spaces too small for proper support. It kinks, it crushes, it tears at the collar connections. We replace with properly sized and supported flex, or convert to hard pipe where space allows, and we never just tape over a collapsed run and call it sealed.
Trusted Brands We Service in Winter Park
Our Duct Sealing technicians carry professional-grade equipment from Nikro and Abatement Technologies, and we stock filtration and sealing products from Honeywell and Aprilaire for Winter Park customers who want matched-system performance. This means no waiting on parts shipped from out of state when your seasonal rental needs to be ready for arrival, and no mismatched components that fail at the joint. We specify the brand and model on every written quote, so you know exactly what goes into your walls.
Common Duct Sealing Problems We See in Winter Park Homes
- Corroded galvanized joints in historic districts. The original metal duct in Park Avenue estates has had 80 to 140 years to rust at the seams. We remove the scale and debris before applying mastic, or the seal fails within a season.
- Crushed flex duct in Orwin Manor attics. Mid-century builders ran flexible duct through spaces too tight for proper radius bends. The duct collapses, airflow drops, and homeowners blame the AC unit when the real problem is in the attic.
- Mold recontamination after hurricane-season moisture. Around Lake Killarney and the Country Club area, power outages during storms let humidity spike inside duct systems. Sealing over moldy duct just traps the problem, we source-remove contamination first.
- Disconnected retrofits behind plaster. In homes where duct was added around original walls, vibration and thermal expansion have shaken joints loose. The air leaks into wall cavities, cooling your framing instead of your rooms.
Pricing for Duct Sealing in Winter Park, FL
Whole-home duct sealing in Winter Park runs $450 – $1,200, with most historic homes landing at $650 – $950. Single repairs, one crushed flex run or a separated joint, typically cost $280 – $550. What moves the price: the material we’re sealing, galvanized and clay take longer than flex, accessibility behind plaster or in tight attics, the extent of pre-cleaning needed to get a bond, and whether we’re also rebalancing the system after the seal. We give you a written price before any work starts, and that number does not move. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Winter Park
Our crews work throughout the Orlando metro, including Winter Park and neighboring Maitland, Orlando, Altamonte Springs, and Casselberry. Scheduling is coordinated from our Miami office, with local technicians dispatched to your area.
Serving Winter Park, FL - Our Local Coverage Area
We’re based in the Winter Park 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 Winter Park
Yes, the humidity is functionally identical, but Winter Park’s older homes have more opportunities for moisture intrusion through deteriorated duct seams, and the plaster-wall construction traps that moisture against retrofitted metal runs. Sealing prevents the conditioned air from escaping, but more importantly for these homes, it prevents humid outside air from being drawn into the system through negative pressure. Call (361) 326-5060 and we’ll inspect whether your leaks are pushing air out or pulling humidity in.
Yes, we seal through existing access panels, register boots, and minimal surgical openings rather than demolition. At a 1925 Mediterranean Revival home off Park Avenue near Lake Osceola, our tech ran a camera inspection of the return and found a crushed galvanized trunk branch buried behind original plaster, leaking conditioned air into the wall cavity. We resealed the run with mastic and mesh and rebalanced the registers at the air handler, and the homeowner’s second-story rooms finally held temperature through the July rainy season. We patch access holes to match existing finish.
Crushed and kinked flex duct in undersized attics, especially in Orwin Manor. The original installers forced too large a duct through too small a chase, and decades of compression have collapsed the inner liner. Sealing a collapsed run traps the restriction, we replace the damaged section with properly supported flex or convert to hard pipe, then seal the new installation. Call (361) 326-5060 for a camera inspection if your airflow has gradually worsened.
Yes, we inspect for moisture contamination before sealing any system that has been without power during an outage. Around Lake Killarney and the older neighborhoods near the Winter Park Country Club, we’ve seen mold colonies established in ductwork within 48 hours of a hurricane-induced outage. Sealing over that contamination locks in the source. We test with a borescope and, if needed, clean before we seal. The 365-Day Done Right Promise covers our work, but it can’t cover a system recontaminated by an unresolved moisture source.
The sealing technique is the same, but the scheduling and scope often differ. Seasonal rentals on Lake Osceola frequently need pre-arrival duct inspection and sealing as part of a turnover package, especially if the home has been closed up during the humid summer. We coordinate with property managers for access, document with before-and-after photos, and provide written certification of the seal for guest-facing documentation. Call (361) 326-5060 to arrange off-season scheduling that doesn’t conflict with rental calendars.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Winter Park since 2004.