Chimney words, explained
Plain English for the words you hear on a chimney visit.
B
Backdraft
When smoke or gases are drawn back into the home instead of exiting through the chimney.
C
Chimney Cap
A cover on top of the chimney that prevents rain, debris, and animals from entering.
Chimney Crown
The top element of a masonry chimney, designed to protect the structure from weather.
Creosote
A tar-like substance that forms inside chimneys from burning wood, which can catch fire.
D
Damper
A movable plate in a chimney used to control the draft and airflow.
Draft
The upward movement of smoke and gases through the chimney to the outdoors.
F
Firebox
The part of the fireplace where the fire actually burns.
Flue
The duct or opening for venting gases from the fireplace or heating appliance.
I
Inspection
A thorough examination of the chimney to ensure it is in safe working condition.
L
Linings
Materials inside a chimney that protect the walls from heat and corrosion.
M
Masonry Repointing
The process of renewing the external part of mortar joints in stone or brick walls.
S
Smoke Chamber
The area above the firebox where smoke gathers before entering the flue.
Soot
Black powdery or flaky substance that accumulates from combustion.
Spalling
When brick or stone breaks or flakes off the chimney due to moisture damage.
V
Vent
An opening that allows smoke or heat to escape the chimney system.
W
Waterproofing
A protective treatment applied to masonry to prevent moisture penetration.
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