When does ductwork need replacing rather than cleaning?
Replacement is warranted when the ductwork itself has failed: flex that is crushed, torn or disconnected, duct board that is saturated or collapsed, insulation that is wet or missing, or runs that were improperly sized from the start. Cleaning restores a dirty system that is otherwise sound. It cannot restore a duct that has lost its structural or thermal integrity, and cleaning one is money spent on a problem it cannot fix.
Attic ductwork and Florida condensation
Most Northeast Florida homes run ductwork through a vented attic where summer temperatures are extreme and humidity is high. When duct insulation gets wet, compressed or falls away, the duct surface drops below the dew point of the surrounding air and condensation forms on the outside of the duct. That shows up as ceiling stains, wet insulation and, eventually, growth.
The fix is not cleaning. It is restoring the thermal envelope around the duct.
Boots are the usual leak point
The boot is the connection between the duct and the ceiling or wall register, and it is where air leakage and condensation most often occur together. Sealing the boot to the drywall and insulating it properly addresses sweating registers, air loss and the gaps that let attic air into the conditioned space.
What we do
- Replace crushed, torn, disconnected or improperly sized flex and rigid duct
- Replace wet, deteriorated or missing duct insulation
- Strip and re-wrap rigid duct with new insulated wrap, sealing accessible joints first
- Seal and insulate supply and return boots
This work is performed under Florida contractor license CAC1824362.
At a glance
- License
- Florida Certified Air Conditioning Contractor CAC1824362
- Materials
- Flex duct, rigid duct, duct board, insulated wrap
- Common triggers
- Ceiling stains, sweating registers, hot rooms, wet attic insulation
- Often paired with
- Aeroseal duct sealing, duct board encapsulation
- Scope
- Partial runs through full system replacement
What the service covers
- Damaged flex and rigid duct replacement
- Duct insulation replacement
- Rigid duct re-wrapping
- Supply and return boot sealing
- Boot insulation
- Joint sealing prior to insulating
Common questions
My ceiling has a stain around a vent. What causes that?
Most often condensation at the boot, where the duct meets the ceiling. Warm humid attic air contacts a cold surface and water forms. Sealing and insulating the boot addresses the cause; painting over the stain does not.
Can you replace just part of the duct system?
Yes, and frequently that is the right scope. Damage is often limited to specific runs. We identify which runs have failed during the inspection and quote the work that is actually needed.
Should I seal or replace?
If the duct is structurally intact and the problem is leakage, sealing is usually the better value. If the duct material itself has failed, sealing a failed duct does not fix it. The inspection is what separates those two cases.
