Our Process
Top damper installation in Casselberry, in detail
How a top sealing damper works
A top sealing damper is a lid that sits on the top of the flue, lined with a gasket and held open by a spring or lever. A stainless cable runs down the inside of the flue to the firebox. Pulling the cable closes the lid against the flue, and releasing it lets the damper open again.
Rockford Chimney Supply's listing for the Lyemance damper describes this layout, with a silicone gasket on the flap and a locking bracket inside the fireplace for the chain handle. On your Casselberry chimney our team explains which model we propose and how its lid, spring and cable work before it is installed.
Sizing the damper to the flue
Top dampers are made for specific flue sizes. The Lyemance range listed by Rockford Chimney Supply runs from 8 by 8 inch to 17 by 17 inch flues, with rectangular and round versions including a 12 inch round, and each frame is meant to sit on a flue of its own size.
The flue opening on your Casselberry chimney is measured before ordering, including how far the tile stands above the crown. A damper chosen by guesswork can overhang the tile or leave gaps that the adhesive has to bridge, so the size goes on the estimate only after it has been measured.
A mounting ring for later service
Some makers offer a ring that sits in the adhesive and takes the damper's screws. In the Lock-Top instructions this option is the Sweep's Ring, sold on its own, and it lets the damper frame fasten to the ring rather than being glued straight to the tile.
Whether your Casselberry chimney needs one depends on the flue top and how the chimney will be serviced in future. Our team explains the choice and lists the ring on the estimate only if we recommend it.
Roof work done with care
Fitting a top damper means working at the top of the chimney, on the roof. Our crew uses proper ladders and roof access, protects the roofing around the chimney and works only when the roof and the weather allow it.
You never need to go on the roof yourself. Our team describes what we found at the top of your Casselberry chimney, and everything is written into the estimate before the work and into the record after it.
