Chimney anatomy

01 · Chimney cap

A chimney cap sits on top of the chimney and prevents rain, debris, and animals from entering.

• Can become damaged due to weather exposure
• May be clogged with debris
• Rust or corrosion can develop

02 · Crown

The crown is a slab that covers the top of the chimney, protecting it from weather damage.

• Cracking can occur due to age or weather
• Water can seep through damaged areas
• Improper construction can lead to further damage

03 · Flashing

Flashing is metal sheeting that seals the space between the chimney and the roof to prevent leaks.

• Can become loose or corroded
• May leak if improperly installed
• Weather can cause it to deteriorate

04 · Brick and mortar

The bricks and mortar form the main structure of the chimney, providing stability and insulation.

• Weathering can cause cracks
• Mortar joints may erode over time
• Bricks can spall due to moisture

05 · Flue liner

The flue liner is a protective lining that ensures safe passage of smoke and gases.

• Can crack due to heat or settling
• Creosote buildup can occur
• Improper installation leads to inefficiency

06 · Smoke chamber

The smoke chamber is a space where hot air and smoke mix before exiting the chimney.

• Can accumulate soot and creosote
• Cracks may develop over time
• Poor construction can lead to inefficiency

07 · Damper

The damper is a movable plate that regulates airflow and helps retain heat when the fireplace is not in use.

• Can become stuck open or closed
• May rust over time
• Improper sealing can lead to energy loss

08 · Firebox

The firebox is the area where the fire burns, built to handle high temperatures.

• Heat can cause cracks
• Mortar can degrade over time
• Bricks may need replacement