Chimney anatomy

01 · Chimney cap

The chimney cap covers the top of the chimney to prevent rain, debris, and animals from entering.

• Can become damaged or rusted over time, losing its effectiveness.
• May become clogged with debris, preventing proper airflow.
• Might blow off in strong winds if not securely fastened.

02 · Crown

The crown is the top, sloped surface of the chimney, designed to direct water away from the flue and bricks.

• Cracks can form due to weather exposure, leading to leaks.
• Improper construction can lead to pooling water.
• Damage can accelerate deterioration of the bricks and mortar beneath.

03 · Flashing

Flashing seals the joint between the chimney and the roof to prevent water from entering.

• Can become loose or rusted, causing leaks.
• Improper installation can lead to gaps and water damage.
• May deteriorate over time due to weather exposure.

04 · Brick and mortar

The brick and mortar form the main structure of the chimney, providing stability and protection.

• Mortar joints can crack and crumble over time.
• Spalling bricks due to freeze and thaw cycles.
• Water penetration can lead to structural damage.

05 · Flue liner

The flue liner is a protective layer that lines the inside of the chimney, helping to contain heat and direct smoke out.

• Cracks can develop, reducing its protective function.
• Creosote buildup can create a fire hazard.
• Improper installation can lead to inefficiencies in venting.

06 · Smoke chamber

The smoke chamber funnels smoke from the fireplace into the flue and out of the home.

• Creosote buildup can restrict airflow and pose a fire risk.
• Cracks can develop, potentially leaking smoke into the home.
• Improper design can lead to inefficient smoke movement.

07 · Damper

The damper is a moveable plate located above the firebox that controls airflow and heat retention.

• Rust or warping can prevent it from sealing properly.
• Debris can obstruct the damper, making it difficult to operate.
• A broken handle or mechanism can prevent it from being opened or closed.

08 · Firebox

The firebox is the part of the fireplace where the fire burns, typically lined with firebrick to withstand high temperatures.

• Cracks in the firebrick can reduce efficiency and pose a safety risk.
• Ash and soot buildup can lead to poor combustion.
• Improper construction can lead to smoke spillage into the home.