Chimney anatomy

01 · Chimney cap

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

• Rust or damage causing leaks
• Animals nesting under the cap
• Clogged with debris blocking ventilation

02 · Crown

The crown is the top surface of the chimney, providing a barrier to protect the chimney structure from water and weather damage.

• Cracks that allow water penetration
• Deterioration due to weather exposure
• Improper slope leading to water pooling

03 · Flashing

Flashing is the metal seal where the chimney meets the roof, preventing water from entering the home.

• Leaks due to poor installation
• Corroded metal leading to water ingress
• Shifting or gaps from settling or wear

04 · Brick and mortar

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

• Cracking due to settling or weather
• Spalling from moisture exposure
• Loose or missing mortar joints

05 · Flue liner

The flue liner is a channel that safely carries smoke and gases out of the home, protecting the chimney walls.

• Cracks that allow heat transfer
• Corrosion from smoke or chemicals
• Improper size causing draft issues

06 · Smoke chamber

The smoke chamber is located above the firebox and funnels smoke from the fire up to the flue.

• Unparged walls causing turbulence
• Soot buildup affecting airflow
• Cracks leading to dangerous smoke leaks

07 · Damper

The damper opens and closes the flue, controlling airflow and preventing drafts when the fireplace is not in use.

• Sticking or difficulty opening
• Warping from heat exposure
• Seals failing, causing drafts

08 · Firebox

The firebox is where the fire is built, designed to withstand high temperatures and contain the fire safely.

• Cracked bricks from heat stress
• Mortar joints deterioration
• Soot or creosote buildup