A protective covering or housing for the top of the chimney intended to prevent the entry of rain, snow, animals, and birds and to help prevent downdrafts.
A flue lining in a masonry chimney is defined as “a clay, ceramic, or metal conduit installed inside of a chimney, intended to contain the combustion products, direct them to the outside atmosphere, and protect the chimney walls from heat and corrosion.”
The top cement-like material at the top of the chimney that marries the brickwork with the flue tile and assists in shedding water away from the chimney.
The plate or valve that closes the fireplace flue when the fireplace is not in use.
There are two basic types of factory-built chimneys: 1) metal factory-built chimneys and 2) modular/masonry factory-built chimneys. Metal factory-built chimneys are factory-made, field-installed components that when used together properly form a complete chimney system. Modular/masonry factory-built chimneys are composed of factory-made, field-assembled components of pre-cast masonry materials. Both metal and modular/masonry factory-built chimneys should be listed according to Underwriters Laboratory (UL) standards and installed according to manufacturers instructions.
A firebox is the place where your fire is built. It consists of 3 walls and a floor constructed of firebrick and refractory mortar. This is where the grate is placed.
Fireplace Doors/Spark Screen:
It is recommended that the height and width of the fireplace opening be covered with a screen and/or glass doors. Be mindful of the type of fireplace, though. Doors intended for a masonry fireplace CANNOT be installed on a prefab or factory-built fireplace. This will create a hot spot at the front of the chimney which can result in an unfriendly fire.
Woodstove inserts are often installed in fireplaces to increase the amount of heat emitted into the home. It is important to note that fireplace inserts require the special installation of a liner system, as most fireplace flues are not intended to withstand the heat output of a wood-stove insert. Consult a professional, CSIA Certified Chimney Sweep® before purchasing a fireplace insert to assure a proper fit and proper installation of both the insert and its accompanying liner.
A chimney flue is the vertical passageway up the inside of your chimney. The damper is often mistakenly called the flue, but the flue is the passageway.
Masonry chimneys are hand-built, field assembled chimneys which may be constructed of brick, concrete block, stone, or pre-cast material.
The smoke chamber is the roughly-triangular space above the throat of the fireplace leading up to the flue.
Spalling is a condition of the chimney where the masonry work (brick or stone) begins to flake or peel from the surface.
This is the area just above the firebox.
In a masonry chimney, the wythe is a brick wall that partitions one flue from another inside the same chimney.
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