Chimney words, explained
Plain English for the words you hear on a chimney visit.
B
Backdraft
A situation where air flows down the chimney into the house, often due to pressure imbalances.
C
Chimney Cap
A cover placed on the top of the chimney to keep out rain, debris, and animals.
Chimney Liner
A lining inside the chimney that protects the masonry from corrosive byproducts of combustion.
Creosote
A flammable, tar-like substance that builds up inside chimneys when wood is burned.
Crown
A protective top layer of the chimney designed to shed water and protect the masonry beneath.
D
Damper
A device that can close the flue to prevent heat loss when the fireplace is not in use.
Draft
The movement of air into and out of the chimney, essential for proper smoke evacuation.
E
Efflorescence
A white, powdery residue on masonry surfaces caused by water-soluble salts.
F
Firebox
The chamber where the fire burns, typically made of firebrick.
Flashing
Material used to seal the joint where the chimney meets the roof to prevent water penetration.
Flue
The duct or vent within the chimney through which smoke and gases exit the home.
M
Masonry
The stone or brickwork that makes up the chimney structure.
R
Repointing
The process of renewing the external part of mortar joints in masonry.
S
Smoking
When smoke enters the home through the fireplace instead of being drawn out through the chimney.
Soot
A black powdery or flaky substance produced by the incomplete burning of organic matter.
W
Waterproofing
A sealant applied to the exterior of the chimney to prevent water absorption.
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