Chimney anatomy

01 · Chimney cap

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

• Can rust or corrode over time
• May become loose or blown off in strong winds
• Clogs from debris may occur

02 · Crown

The chimney crown is the concrete slab that covers and seals the top of the chimney.

• Cracks can allow water to seep in
• Erosion due to weather exposure
• Improper slope causing water pooling

03 · Flashing

Flashing is a thin material installed to prevent water from entering the area where the chimney meets the roof.

• Leaks due to improper installation
• Wear and tear over time causing gaps
• Corrosion of metal flashing

04 · Brick and mortar

Brick and mortar make up the main structure of the chimney, providing stability and heat resistance.

• Cracking due to settling or temperature changes
• Deterioration from moisture”,

05 · Flue liner

The flue liner protects the chimney walls from heat and corrosion while guiding smoke up and out.

• Cracking or splitting over time
• Build-up of creosote reducing efficiency
• Improper sizing leading to inefficiencies

06 · Smoke chamber

The smoke chamber is directly above the firebox, helping to funnel smoke from a wide to a narrow path.

• Soot and creosote accumulation
• Cracks or deterioration of masonry
• Improper parging leading to inefficiencies

07 · Damper

The damper is a valve used to control airflow and helps seal the chimney when not in use.

• Rust or corrosion making it hard to operate
• Seals wearing out reducing efficiency
• Improper fit leading to drafts

08 · Firebox

The firebox is where the fire is built and contained, usually made of firebricks to withstand high temperatures.

• Brick damage from intense heat
• Mortar joints deteriorating
• Soot build-up reducing efficiency