Chimney words, explained
Plain English for the words you hear on a chimney visit.
C
Chimney Cap
A protective covering installed on the top of a chimney to keep out debris, rain, and animals.
Chimney Crown
The top element of the chimney, which sheds water and protects the masonry.
Chimney Relining
The process of installing a new liner inside the chimney to ensure safety and efficiency.
Creosote
A flammable byproduct of burning wood that can accumulate in the chimney and lead to chimney fires.
D
Damper
A movable plate in the flue that controls airflow and can seal the chimney when not in use.
Draft
The flow of air upwards through the chimney, important for proper chimney operation.
E
Efflorescence
A white, powdery substance that appears on the surface of the chimney due to moisture moving through the masonry.
F
Firebox
The inner part of the fireplace where the fire burns.
Flashing
Material used to seal the joint between the chimney and the roof to prevent leaks.
L
Liner
A clay, ceramic, or metal conduit in the chimney that improves safety and performance.
M
Masonry
The brick, stone, or concrete block construction that forms the outer structure of the chimney.
R
Repointing
The process of renewing the external part of mortar joints in masonry construction.
S
Smoke Chamber
The area above the firebox that directs smoke into the flue.
Spalling
When brick or masonry flakes or peels away, often due to moisture-related issues.
Spark Arrestor
A metal screen installed on the chimney cap to prevent sparks from escaping the chimney.
W
Waterproofing
Applying a sealant to the chimney to prevent water penetration.
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