Chimney words, explained
Plain English for the words you hear on a chimney visit.
B
Backdraft
When smoke enters the home rather than exiting through the chimney.
C
Chimney Cap
A cover on top of the chimney that keeps out rain, debris, and animals.
Chimney Crown
The top part of a masonry chimney that sheds water.
Combustion Chamber
The space where the fire burns, located inside the fireplace.
Creosote
A tar-like substance that builds up inside chimneys and can cause fires.
D
Damper
A movable plate that controls airflow in and out of the chimney.
Draft
The movement of air up the chimney, essential for proper fireplace function.
F
Flashing
Material used to seal the gap where the chimney meets the roof.
Flue
The duct or opening in a chimney for smoke and gases to exit.
L
Lintel
A horizontal support beam above the fireplace opening.
M
Masonry
The brickwork or stonework that makes up the chimney structure.
P
Pyrolysis
Chemical changes in wood exposed to heat, leading to creosote formation.
R
Repointing
The process of renewing the external part of mortar joints.
S
Smoke Shelf
A shelf-like area inside the chimney that deflects downdrafts.
Spark Arrestor
A device that prevents embers from escaping the chimney.
W
Waterproofing
Applying a sealant to prevent water from penetrating the chimney masonry.
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