Chimney anatomy

01 · Chimney cap

The chimney cap sits at the top of the chimney, preventing debris, rain, and animals from entering.

• Can become damaged or blown off in high winds
• Rust or corrosion over time, leading to leaks
• Clogged with debris, reducing airflow

02 · Crown

The crown is the cement part that sits on top of your chimney, protecting it from weather damage.

• Cracks can form, allowing water to seep in
• Deterioration from freeze-thaw cycles
• Improper construction leads to water pooling

03 · Flashing

Flashing is metal that seals the space between the chimney and roof, preventing water leaks.

• Rust and corrosion over time
• Improper installation leading to leaks
• Damage from weather or animals

04 · Brick and mortar

This forms the structure of the chimney, supporting and enclosing the flue.

• Cracks in bricks or mortar joints
• Deterioration from weather
• Spalling, where bricks flake and break

05 · Flue liner

The flue liner is a conduit inside the chimney that safely carries smoke and gases out of the home.

• Cracks or damage from heat
• Improperly sized liners affecting draft
• Creosote build-up leading to blockages

06 · Smoke chamber

The smoke chamber is the area above the firebox where smoke is funneled into the flue.

• Soot build-up reducing efficiency
• Cracks forming from heat exposure
• Improper construction affecting draft

07 · Damper

The damper is a device inside the flue that opens and closes to control airflow.

• Rust or damage preventing proper closure
• Misalignment causing drafts
• Build-up of soot and creosote

08 · Firebox

The firebox is the part of the fireplace where the fire actually burns.

• Cracks in the firebrick from heat
• Mortar deterioration
• Soot and ash build-up