Chimney anatomy

01 · Chimney cap

The chimney cap sits atop the chimney and prevents rain, debris, and animals from entering.

• Rusting or corrosion
• Becoming dislodged or blown away
• Clogging with debris

02 · Crown

The crown is a slab of concrete that sits on top of the chimney to protect brickwork and mortar from weather damage.

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

03 · Flashing

Flashing is the metal material used to seal the joint between the chimney and roof, preventing water leaks.

• Leaks due to improper installation
• Rusting or bending of metal
• Sealant deterioration

04 · Brick and mortar

Masonry includes the bricks and mortar that make up the chimney structure, providing support and insulation.

• Cracking or crumbling mortar
• Brick spalling or flaking
• Structural instability

05 · Flue liner

The flue liner lines the inside of the chimney flue, protecting chimney walls from heat and corrosion.

• Cracking or splitting
• Build-up of creosote
• Improper installation

06 · Smoke chamber

The smoke chamber directs smoke from the firebox into the flue, easing the transition of smoke upward.

• Creosote accumulation
• Cracks or deterioration
• Poor construction causing smoke backup

07 · Damper

The damper regulates airflow and prevents heat loss when the fireplace is not in use.

• Difficulty opening or closing
• Warping or rusting
• Sealing improperly

08 · Firebox

The firebox is where the fire burns, constructed of heat-resistant materials to contain the fire safely.

• Cracking of bricks
• Mortar joint deterioration
• Heat damage