Chimney anatomy

01 · Chimney cap

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

• Rust or deterioration over time
• Becoming loose due to wind or storms
• Clogging with debris

02 · Crown

The chimney crown is a slab that covers the top of the chimney to keep water out.

• Cracking due to weather exposure
• Water pooling on the surface
• Deterioration of material over time

03 · Flashing

Flashing is a material that seals the joint between the chimney and roof to prevent leaks.

• Metal corrosion causing leaks
• Improper installation leading to gaps
• Damage from storms or debris

04 · Brick and mortar

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

• Cracking and spalling bricks
• Mortar joint deterioration
• Water infiltration causing damage

05 · Flue liner

A flue liner protects the chimney walls from heat and corrosive byproducts.

• Cracks or breaks in the liner
• Improperly sized liner for the appliance
• Corrosion or buildup of creosote

06 · Smoke chamber

The smoke chamber funnels smoke from the fireplace into the flue.

• Cracks or gaps in the chamber walls
• Improper shape affecting draft
• Buildup of creosote and soot

07 · Damper

A damper seals the chimney when not in use to prevent air escape and drafts.

• Rust causing it to stick
• Improper sealing letting warm air escape
• Mechanical failure not allowing it to open or close

08 · Firebox

The firebox is the inner chamber where the fire burns.

• Cracked firebricks from heat
• Mortar joints deteriorating
• Damage from moisture