A damper with no working seal pours your air conditioning out the top of the house. We free seized throat dampers, replace failed plates, and install top-sealing dampers that close tight.
The damper is the hinged plate that opens your fireplace to the flue for a fire and seals it shut through the remaining months — and in South Florida, the remaining months are most of them. Traditional throat dampers are made of cast iron, parked in damp, salty air above the firebox through long idle stretches, and they corrode: hinges seize, plates pit and warp, handles snap or spin uselessly. A damper stuck open is a permanent hole in your building envelope, and one stuck shut makes the fireplace unusable.
For Pinecrest homeowners, the real cost of a failed damper shows up on the electric bill: air conditioning runs practically year-round here, and an unsealed flue quietly exhausts cooled air while pulling hot, humid air back down. A stuck-open damper also invites debris from the oak and banyan canopy straight into the flue. We free and rebuild throat dampers when the hardware is worth saving, and when it isn't, we install top-sealing dampers — spring-loaded lids crowning the flue, with a silicone gasket that closes far tighter than any throat plate ever did.
Seized plates are freed, hinges and pivots cleaned and lubricated, and bent hardware straightened or replaced.
Rusted-through plates and broken handles are replaced with parts matched to the damper frame.
A gasketed damper mounted where the flue terminates, operated by a cable reachable from the firebox, sealing far tighter than a throat plate.
Every repair ends with a full open-close cycle and a check that the damper seats and seals.
We check the plate, frame, hinges, and seal to see whether the hardware in place can be restored.
Salvageable dampers are freed and rebuilt; corroded-out units are replaced, often with a top-sealing model.
We cycle the damper, confirm it seats fully, and make sure it's easy to operate from the firebox.
Free written estimates · Upfront pricing · Same-day service available
If the plate and frame are sound and just seized, a repair makes sense. If the metal is pitted through or the frame is warped, a top-sealing damper is usually the better investment — it seals with a gasket rather than metal-on-metal, and it also blocks rain and debris from ever entering the flue.
Only slightly. You open and close it with a cable handle mounted inside the firebox instead of the old lever. Open it before lighting, close it once the ashes are fully out, exactly as before.
A flue with no working seal moves air constantly — cooled indoor air rises out while hot, humid outdoor air works its way in. Sealing it closes one of the largest uncontrolled openings in the house, and homeowners usually notice the difference in comfort near the fireplace right away.
Part of our Fireplace Repair work in Pinecrest and across south Miami-Dade County.