Chimney anatomy

01 · Chimney cap

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

• Cap gets damaged or blown away
• Rust and corrosion
• Clogs with debris

02 · Crown

The crown is a slab that covers the top of the chimney, slightly sloped to shed water.

• Cracks develop in the crown
• Water leakage
• Erosion over time

03 · Flashing

Flashing is a waterproof seal between the chimney and roof to prevent water leaks.

• Leaks due to poor installation
• Corroded metal
• Separation from the roof

04 · Brick and mortar

The masonry is the brick and mortar structure that forms the main body of the chimney.

• Cracked or crumbling bricks
• Missing mortar
• Efflorescence (white stains)

05 · Flue liner

The flue liner is a protective layer that lines the inside of the chimney to improve safety and efficiency.

• Cracked or deteriorated liner
• Liner blockage
• Improper sizing

06 · Smoke chamber

The smoke chamber funnels smoke from the firebox into the flue and is located just above the damper.

• Parging issues leading to inefficient smoke flow
• Build-up of creosote
• Cracks in chamber walls

07 · Damper

The damper controls the flow of air and smoke through the chimney, located just above the firebox.

• Fails to open or close properly
• Rust and corrosion
• Warping

08 · Firebox

The firebox is the area where the fire burns, constructed with fire-resistant materials.

• Cracked firebricks
• Deteriorated mortar joints
• Smokey backdraft issues