Clean, seal or replace: a duct decision by age
Ductwork in Palm Coast has a birthday too, and it tells you more about what to do than any brochure. Here's the ladder we use before we recommend anything.
The duct age ladder
A duct system doesn’t fail on a schedule, but it does age in recognizable steps, and Palm Coast’s housing makes those steps unusually easy to read.
Under 10 years. Builder flex duct in Sawmill Creek, newer Seminole Woods and Town Center. Problems are installation problems: a run crushed under attic storage, a boot never sealed, a kink at a truss. Fix the defect; leave the rest alone.
10 to 15 years. Late boom and post-boom homes. The flex duct’s outer jacket is still intact, the insulation is still fluffy, but the tape at every joint has let go in the attic heat and the system is leaking a measurable share of its air. Seal it.
15 to 25 years. The 2004-2007 wave across Lehigh Woods, Quail Hollow, Indian Trails and Belle Terre, which is most of the city. Flex duct inner liners tear, insulation slumps, supports fail, and the duct and the equipment reach the end at the same time. Clean it if the growth is the complaint; replace it if the airflow is.
25 to 50 years. ITT-era Palm Harbor and Woodlands homes with sheet-metal trunks and either original metal branches or a later flex retrofit. The metal is often fine; the seams leak and the branches are undersized for a modern system. Clean, seal and often upsize the returns.
Clean, seal or replace
Walk the tree with us.
- What’s the complaint? - Dust, smell, allergies: go to 2. - Hot and cold rooms, weak airflow, high bills: go to 3. - Both: go to 3 first; a leaking duct makes everything else worse.
- What does the camera show? - Debris, construction dust, pet hair, surface growth on a sound duct: clean, then seal the joints so it doesn’t return. - Growth inside flex duct liner, or liner that’s torn: replace that run. You can’t clean a torn liner.
- Where is the air going? - Duct leakage tested high but duct intact: seal, with mastic, not tape. - Runs crushed, undersized or disconnected: replace those runs, and resize the returns while the attic is open. - Duct failing and the system is 18-plus years old: replace both together. One attic day, one permit, one disruption.
Flex, board and metal: what’s in Palm Coast attics
| Material | Where we find it | What goes wrong | Usual answer |
|---|---|---|---|
| Sheet metal trunk | 1970s-80s Palm Harbor, Woodlands | Seam leaks, dust floor, undersized branches | Clean and seal; upsize returns |
| Duct board plenums | 1980s-90s Pine Lakes, Cypress Knoll | Edges fray, surface shedding, moisture staining | Replace plenum; seal or clean the rest |
| Flex duct, builder grade | 2000s boom sections | Liner tears, sagging, crushed runs, failed tape | Seal if young; replace if old |
| Flex duct, newer | Sawmill Creek, Town Center, new Seminole Woods | Installation defects only | Spot repairs and sealing |
We work on all of it, attached to any brand of equipment. Lennox is what we install; the duct doesn’t care.
What’s warrantied
Duct work isn’t a boxed product with a manufacturer’s card, so the warranty question deserves a plain answer.
- Cleaning is a service; the result is what you see on the camera before and after, and we photograph both.
- Sealing with mastic is workmanship, and Cook’s stands behind it. [[CONFIRM WITH JERRY: the workmanship warranty period on duct sealing]]
- Replacement duct carries the material maker’s warranty on the product and our workmanship guarantee on the install. When duct is replaced with a new system, both are covered under the same job.
- What we don’t warranty: airflow to a room when a homeowner later piles holiday bins on the run. We’ll show you where not to stack.
Paying for duct work
Cleaning and sealing are priced per job after the camera inspection, and quoted before any tool comes out. Full duct replacement is a bigger number, and it’s one of the places financing with low monthly payments makes sense, especially when the duct goes in alongside a new high-efficiency system. FPL offers a duct rebate through its home energy programs, separate from the HVAC rebate, and we’ll explain how its paperwork is handled. [[CONFIRM WITH JERRY: current FPL duct-rebate terms and who files]] No lender names or rates live on this page; the office has the current options.
Why Palm Coast duct ages the way it does
Attics here hit 130 degrees from May to October. The air inside the duct is 55; the air outside it is saturated and hot. Every joint sweats, every tape adhesive bakes, and every hurricane season moves the roof enough to shift the runs. Add nineteen thousand houses built in a four-year rush with the cheapest flex available, and you get a city where the duct is the problem behind the problem more often than anywhere we work. A camera look costs very little and settles the question.
Duct questions from Palm Coast attics
The bonus room over the garage is always ten degrees off. Duct problem?
Nine times out of ten. Long runs, too few supplies, a flex duct crushed under storage or kinked around a truss. We measure airflow at the register and compare it to what the room needs; the fix is usually a rerouted or upsized run, not a second system.
When the pine flatwoods burn, can anything keep the smoke out of the house?
Sealed ducts and a tight return keep the system from pulling smoky attic air; a media filter cabinet catches a good share of the particles. For the fine smoke that gets through, a true HEPA bypass unit helps, but the duct sealing comes first or the filter is fighting a leak.
Will cleaning the ducts bring the dog-hair dust down?
If the dust is coming from the ducts, yes. If it’s coming through a leaky return or past a one-inch filter, cleaning buys a few weeks. We look with a camera before quoting a cleaning, because selling one that won’t help is how this trade earned its reputation.
Our Town Center townhome is tight and new. Does the duct still need attention?
Less than a 2005 house, but builder flex duct is builder flex duct. A quick inspection for crushed runs and loose boots, and sealing anything we find, is cheap insurance before the warranty on the house runs out.
Other services in Palm Coast
- A/C ServicesDiagnosis, tune-ups, repairs and replacements from one local crew. Start here if you're not sure which you need.
- A/C RepairAny brand, any hour, parts on the truck. Twelve minutes from most of the city.
- A/C MaintenanceTwo visits a year, timed to the start and end of cooling season, for a system that runs nine months straight.
- A/C InstallationLoad-calculated, permitted, rebate-ready installs from a Lennox dealer that knows which era your house is from.
- ThermostatsSmart, programmable and zoning thermostats installed and wired right, with the schedule set before we leave.
- GeothermalEarth-coupled heat pumps for Palm Coast properties with room for a loop field. Quieter, steadier, and built for the long run.
- Heating ServicesHeat pumps, strip heat, gas and propane furnaces. Repair, maintenance and replacement for the few weeks a year that need it.
- Heat PumpOne machine for nine months of cooling and thirty nights of heat. Repair, maintenance and installation for all of them.
- Heat Pump RepairResidential and light-commercial heat pump repair, diagnosed in both modes, priced before the work.
- Heat Pump MaintenanceSpring and fall visits that test both modes, flush the drain, clean the coils and leave you a written report.
- Heat Pump InstallationLoad-calculated heat pump replacements, permitted and rebate-checked, for the boom-era systems aging out across the city.
- Furnace RepairGas, propane and electric furnace repair with safety checks first, flat-rate pricing and no night surcharge.
- Furnace MaintenanceFall safety and performance checks for gas, propane and electric furnaces that spend most of the year switched off.
- Furnace InstallationNew furnaces and dual-fuel systems sized for a 49-degree winter and installed with the combustion checks a Florida garage needs.
- Air QualityWhole-home dehumidifiers, media filtration, UV and ventilation, chosen for a town with mid-70s dew points.
- Indoor Air QualityRoom-by-room measurement, honest findings and right-sized fixes: filtration, UV, dehumidification and fresh air.
- CommercialRepair, maintenance and installation of commercial HVAC for Palm Coast's strip centers, restaurants, offices and medical suites.
Rooms that never match the thermostat?
Call the Palm Coast shop for a camera look at the duct. We'll tell you clean, seal or replace, with the numbers.