Chimney words, explained
Plain English for the words you hear on a chimney visit.
B
Backdraft
The reverse flow of air and smoke into the home, often caused by poor draft.
C
Chimney Breast
The portion of the chimney that projects outward into a room.
Chimney Cap
A cover that sits on top of the chimney to keep out rain, debris, and animals.
Chimney Liner
A lining inside the flue intended to contain combustion products and direct them outside.
Creosote
A flammable, tar-like substance that accumulates in chimney flues from burning wood.
Crown
The top area of a chimney, designed to protect the underlying masonry from weather damage.
D
Damper
A device to regulate the airflow and control the amount of air entering the chimney.
Draft
The upward flow of air that helps pull smoke out of the fireplace and up the chimney.
F
Firebox
The part of a fireplace where the fire occurs, typically made of firebrick.
Flashing
Material used to seal the area where the chimney meets the roof to prevent leaks.
Flue
The passage inside the chimney that directs smoke and gases out of the home.
M
Masonry
The construction of structures from individual units of brick, stone, or block.
R
Repointing
The process of renewing the external part of mortar joints in masonry.
S
Smoke Chamber
The area just above the fireplace where smoke gathers before moving into the flue.
Soot
A black powdery substance produced by incomplete combustion, often accumulating in chimneys.
Spalling
The process of brick or stone chipping or falling away from the chimney structure.
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