Chimney words, explained
Plain English for the words you hear on a chimney visit.
B
Backdraft
When smoke or gases flow back into the home instead of up the chimney.
C
Chimney Breast
The part of the wall that projects out to encase the chimney.
Chimney Cap
A cover at the top of the chimney that prevents rain, debris, and animals from entering.
Chimney Crown
The top surface of a chimney that seals the top of the masonry.
Chimney Liner
A lining inside the flue that protects the chimney walls from heat and corrosion.
Chimney Stack
The visible part of the chimney that extends above the roof.
Creosote
A black, tar-like substance that forms in chimneys from burning wood. It is flammable and should be cleaned regularly.
D
Damper
A metal plate that opens and closes to allow smoke to exit or seal heat in.
Draft
The upward flow of air through a chimney that carries smoke and gases away from the fireplace.
E
Efflorescence
A white, powdery substance on masonry surfaces caused by moisture drawing salts out of the material.
F
Firebox
The part of the fireplace where the fire burns.
Flue
The inner part of the chimney that carries smoke and gases out of the home.
Flue Lining
Material inside the chimney that aids in protecting the walls and improving draft.
M
Masonry Repointing
The process of renewing the external part of mortar joints in a chimney or other structure.
S
Smoke Chamber
The area above the firebox where smoke gathers before rising into the flue.
Spalling
When bricks or stone break apart, usually due to water damage.
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