Chimney anatomy
Every part of a chimney, what it does and what goes wrong with it.
PART 01
Chimney cap
The chimney cap sits on top of the chimney and prevents rain, debris, and animals from entering the chimney.
- Rust or damage from weather exposure
- Debris accumulation blocking proper ventilation
- Animal nests or entry through damaged cap
PART 02
Crown
The crown is the top surface of the chimney that seals the top of the chimney structure and directs water away.
- Cracks or deterioration allowing water penetration
- Improper sloping leading to water pooling
- Erosion from harsh weather conditions
PART 03
Flashing
Flashing is the metal barrier that seals the space between the chimney and roof to prevent water leaks.
- Rust or corrosion over time
- Improper installation leading to gaps
- Separation from roof due to shifting
PART 04
Brick and mortar
The brick and mortar make up the main structure of the chimney, providing stability and insulation.
- Cracking or spalling of bricks
- Deterioration of mortar joints
- Water damage causing structural issues
PART 05
Flue liner
The flue liner protects the chimney walls from corrosive byproducts of combustion and improves efficiency.
- Cracks or gaps compromising safety
- Creosote buildup reducing air flow
- Deterioration from heat or chemicals
PART 06
Smoke chamber
The smoke chamber transitions the fireplace to the flue, helping to smoothly move smoke upwards.
- Soot and creosote buildup
- Uneven surfaces causing turbulence
- Cracks reducing efficiency
PART 07
Damper
The damper is a movable plate that controls airflow and prevents heat loss when the fireplace is not in use.
- Sticking or difficulty operating
- Warping from excessive heat
- Rust or corrosion
PART 08
Firebox
The firebox is the area where the fire burns, typically lined with firebricks for heat resistance.
- Cracked or damaged firebricks
- Mortar deterioration from heat
- Accumulation of ash and soot
01 · Chimney cap
The chimney cap sits on top of the chimney and prevents rain, debris, and animals from entering the chimney.
- Rust or damage from weather exposure
- Debris accumulation blocking proper ventilation
- Animal nests or entry through damaged cap
02 · Crown
The crown is the top surface of the chimney that seals the top of the chimney structure and directs water away.
- Cracks or deterioration allowing water penetration
- Improper sloping leading to water pooling
- Erosion from harsh weather conditions
03 · Flashing
Flashing is the metal barrier that seals the space between the chimney and roof to prevent water leaks.
- Rust or corrosion over time
- Improper installation leading to gaps
- Separation from roof due to shifting
04 · Brick and mortar
The brick and mortar make up the main structure of the chimney, providing stability and insulation.
- Cracking or spalling of bricks
- Deterioration of mortar joints
- Water damage causing structural issues
05 · Flue liner
The flue liner protects the chimney walls from corrosive byproducts of combustion and improves efficiency.
- Cracks or gaps compromising safety
- Creosote buildup reducing air flow
- Deterioration from heat or chemicals
06 · Smoke chamber
The smoke chamber transitions the fireplace to the flue, helping to smoothly move smoke upwards.
- Soot and creosote buildup
- Uneven surfaces causing turbulence
- Cracks reducing efficiency
07 · Damper
The damper is a movable plate that controls airflow and prevents heat loss when the fireplace is not in use.
- Sticking or difficulty operating
- Warping from excessive heat
- Rust or corrosion
08 · Firebox
The firebox is the area where the fire burns, typically lined with firebricks for heat resistance.
- Cracked or damaged firebricks
- Mortar deterioration from heat
- Accumulation of ash and soot