Chimney Definitions

Chimney definitions are provided by The Fireplace Doctor.

Chimney Damper Chimney Crown
Fireplace Hearth Chimney Chase Cover
Cricket Flashing Shrouds
Ash Pit Clean Out Door Mantel
Face Wall Flue Smoke Chamber
Smoke Shelf Lintel Hearth Extension

Chimney: the passage through which smoke or fumes from a fire escape; flue; a structure containing a flue or flues and extending above the roof of a building.

Damper: an adjustable plate, as in the flue of a furnace or stove, for controlling the draft.

Chimney Crown: also called a Wash,a masonry roof that covers the roof your chimney, prevents water from seeping into the masonry below

Fireplace: a place for a fire, esp. an open place built in a wall, at the base of a chimney; a masonry structure or metal frame with a grill for outdoor cooking over an open fire

Hearth: the stone or brick floor of a fireplace, often extending out into the room

Chimney Chase Cover: a metal fabricated cap designed to fit over your chimney chase. It is important that this cover is installed properly so that the water is deterred off the chase cover so that no sitting water could puddle causing the cover to rust. This would result in a leaky chase cover.

Cricket: a ridge structure designed to divert water on a roof. Generally found on the high side of a chimney or the transition from one roof area to another, the cricket is normally the same pitch as the rest of the roof, but not always. Smaller crickets are covered with metal flashing, and larger ones can be covered with the same material as the rest of the roof.

Flashing: protective layer of metal that stops water leaks from seeping through where the chimney meets the roof. Chimney flashing is extremely important in roof construction and must be installed correctly in order to avoid expensive roof and ceiling repairs that are the result of water damage.

Shrouds: designed to fit over the top of a chase cover, or the top of a masonry chimney. These are designed for areas that have drafty winds such as a chimney located close to the gulf coast or ocean waters. The reason for having shrouds would be because of gusty winds causing a down draft and smoke problems inside the home. Shrouds can also be installed for aesthetic reasons.

Ash Pit: is a passageway that ashes may be emptied into.

Clean Out Door: is used to remove creosote and other foreign matter from the chimney. The clean-outs door should be tightly sealed to prevent cool air from entering the chimney as this reduces proper drafting efficiency.

Mantel: is a decorative shelf above the fireplace. The one shown is made of brick but others may be made of wood, plaster, stone, cast iron or other decorative materials.

Face Wall: is the decorative bricks above your firebox known as the facade.

Flue: is the passageway for smoke & fumes. Clay flue tiles, used in most newer masonry chimneys, provide a barrier that helps contain smoke, fumes and soot so they are not absorbed into the masonry chimney.

Smoke Chamber: is the area above the fireplace and below the flue, used to allow smoke to mix and rise into the flue. Because smoke tends to linger here, large deposits of creosote often accumulate here.

Smoke Shelf: helps collect small amounts of rain that may enter the chimney. Considerable creosote deposits may collect here. The hinged plate shown is the Damper which is used to close off the chimney when the fireplace is not in use. Helps to prevent loss of heated air up the chimney.

Lintel: is a piece of metal that supports the face wall.

Hearth Extension: is the extension of the hearth of the fireplace. This is otherwise known as the area in front of the firebox.

Give us a call if you have any questions on any of the terms. Our technicians will be glad to offer any assistance in answering your question(s). Let us know if we are missing any terms so we can update and help keep other informed.

If you’re looking for chimney services then give us a call today at 1-888-565-0124 or email us.