Chimney anatomy
Every part of a chimney, what it does and what goes wrong with it.
PART 01
Chimney cap
The chimney cap sits at the top of the chimney, covering the opening to keep out rain, animals, and debris.
- Cap can become damaged or dislodged
- Debris can block the cap
- Rust or corrosion can occur
PART 02
Crown
The crown is the top surface of the chimney, typically made of concrete, that helps protect the masonry from weather damage.
- Cracking due to weather exposure
- Poor construction can lead to early deterioration
- Water seepage through cracks
PART 03
Flashing
Flashing is a metal layer that prevents water from entering the space between the chimney and roof.
- Flashing can become loose over time
- Corrosion or rust can develop
- Water leaks if improperly installed
PART 04
Brick and mortar
The masonry structure of the chimney provides the core stability, constructed from bricks and mortar.
- Mortar joints may crack or crumble
- Bricks can spall or deteriorate
- Moisture penetration weakens masonry
PART 05
Flue liner
The flue liner lines the inside of the chimney, directing smoke and gases out of the home.
- Liner can crack or corrode
- Blockages from creosote buildup
- Improper size can affect draft
PART 06
Smoke chamber
The smoke chamber is located just above the firebox, funneling smoke into the flue from the fire below.
- Creosote buildup can restrict airflow
- Cracks may develop in the walls
- Improper design affects performance
PART 07
Damper
The damper is a movable plate that regulates air flow and can seal the chimney when not in use.
- Damper can rust or corrode
- Mechanism may get stuck
- Improper seal can lead to drafts
PART 08
Firebox
The firebox is the area where the fire burns, typically made from firebrick.
- Cracks in firebrick can occur
- Mortar joints can deteriorate
- General wear and tear from heat over time
01 · Chimney cap
The chimney cap sits at the top of the chimney, covering the opening to keep out rain, animals, and debris.
- Cap can become damaged or dislodged
- Debris can block the cap
- Rust or corrosion can occur
02 · Crown
The crown is the top surface of the chimney, typically made of concrete, that helps protect the masonry from weather damage.
- Cracking due to weather exposure
- Poor construction can lead to early deterioration
- Water seepage through cracks
03 · Flashing
Flashing is a metal layer that prevents water from entering the space between the chimney and roof.
- Flashing can become loose over time
- Corrosion or rust can develop
- Water leaks if improperly installed
04 · Brick and mortar
The masonry structure of the chimney provides the core stability, constructed from bricks and mortar.
- Mortar joints may crack or crumble
- Bricks can spall or deteriorate
- Moisture penetration weakens masonry
05 · Flue liner
The flue liner lines the inside of the chimney, directing smoke and gases out of the home.
- Liner can crack or corrode
- Blockages from creosote buildup
- Improper size can affect draft
06 · Smoke chamber
The smoke chamber is located just above the firebox, funneling smoke into the flue from the fire below.
- Creosote buildup can restrict airflow
- Cracks may develop in the walls
- Improper design affects performance
07 · Damper
The damper is a movable plate that regulates air flow and can seal the chimney when not in use.
- Damper can rust or corrode
- Mechanism may get stuck
- Improper seal can lead to drafts
08 · Firebox
The firebox is the area where the fire burns, typically made from firebrick.
- Cracks in firebrick can occur
- Mortar joints can deteriorate
- General wear and tear from heat over time