Chimney words, explained
Plain English for the words you hear on a chimney visit.
B
blockage
An obstruction in the flue or chimney that restricts airflow, such as debris or nests.
C
chimney cap
A cover on top of the chimney that prevents rain, debris, and animals from entering.
chimney crown
The top surface of a chimney that seals the chimney top and sheds water away from the flue.
chimney liner
A lining in the chimney flue that protects the walls from heat and corrosion.
creosote
A flammable substance that builds up inside the chimney flue as wood burns and can lead to chimney fires.
D
damper
A device that opens and closes to regulate airflow and smoke passage in the chimney.
down draft
An occurrence where wind pushes air back into the chimney instead of allowing it to flow out.
draft
The airflow that pulls smoke and gases up and out of the chimney.
E
efflorescence
A white powdery residue on bricks caused by moisture drawing salts to the surface.
F
firebox
The internal part of the fireplace where the fire burns.
flue
The passageway in a chimney that directs smoke and gases out of the home.
M
masonry repointing
The process of renewing the external part of mortar joints in masonry construction.
S
smoke chamber
The area just above the fireplace that funnels smoke into the flue.
smoke shelf
A ledge behind the damper that helps prevent downdrafts from pushing smoke back into the home.
spark arrestor
A device that prevents sparks from leaving the chimney flue and causing a fire hazard.
W
waterproofing
Applying a protective layer to the chimney to prevent water penetration and damage.
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