Chimney anatomy
Every part of a chimney, what it does and what goes wrong with it.
PART 01
Chimney cap
The chimney cap is a protective covering placed on top of the chimney to keep out rain, debris, and animals.
- Rust or corrosion can cause the cap to deteriorate.
- Improper installation might result in water leakage.
- Caps can become clogged with debris over time.
PART 02
Crown
The chimney crown is a slab, typically made of concrete, covering the top of the chimney to protect it from weather damage.
- Cracks can form due to weather exposure.
- Improper slope can lead to water pooling.
- Poor construction can cause premature deterioration.
PART 03
Flashing
Flashing is a sheet of metal installed at the joint between the chimney and roof to keep water from entering the home.
- Leaks can occur if the flashing becomes loose.
- Metal flashing can corrode or rust over time.
- Improperly installed flashing may not seal properly.
PART 04
Brick and mortar
Brick and mortar make up the main structure of the chimney, providing stability and support.
- Bricks can crack or spall due to freeze-thaw cycles.
- Mortar joints may erode over time.
- Moisture penetration can weaken the masonry.
PART 05
Flue liner
The flue liner runs inside the chimney and directs smoke and gases out of the home safely.
- Cracks can develop from excessive heat.
- Improper sizing can affect efficiency and safety.
- Creosote buildup can restrict airflow.
PART 06
Smoke chamber
The smoke chamber is located just above the firebox and guides smoke into the flue.
- Creosote can accumulate, increasing fire risk.
- Unsmoothed surfaces can cause turbulence, reducing efficiency.
- Cracks can allow smoke to escape into the home.
PART 07
Damper
The damper is a movable plate that controls air flow through the chimney, helping to retain heat when the fireplace is not in use.
- Dampers can rust and become difficult to operate.
- Improper sealing can result in drafts.
- Creosote buildup can prevent proper closure.
PART 08
Firebox
The firebox is the chamber where the fire burns, typically made of fire-resistant brick or metal.
- Bricks can crack from repeated heating and cooling.
- Mortar joints may deteriorate over time.
- Metal components can warp or rust.
01 · Chimney cap
The chimney cap is a protective covering placed on top of the chimney to keep out rain, debris, and animals.
- Rust or corrosion can cause the cap to deteriorate.
- Improper installation might result in water leakage.
- Caps can become clogged with debris over time.
02 · Crown
The chimney crown is a slab, typically made of concrete, covering the top of the chimney to protect it from weather damage.
- Cracks can form due to weather exposure.
- Improper slope can lead to water pooling.
- Poor construction can cause premature deterioration.
03 · Flashing
Flashing is a sheet of metal installed at the joint between the chimney and roof to keep water from entering the home.
- Leaks can occur if the flashing becomes loose.
- Metal flashing can corrode or rust over time.
- Improperly installed flashing may not seal properly.
04 · Brick and mortar
Brick and mortar make up the main structure of the chimney, providing stability and support.
- Bricks can crack or spall due to freeze-thaw cycles.
- Mortar joints may erode over time.
- Moisture penetration can weaken the masonry.
05 · Flue liner
The flue liner runs inside the chimney and directs smoke and gases out of the home safely.
- Cracks can develop from excessive heat.
- Improper sizing can affect efficiency and safety.
- Creosote buildup can restrict airflow.
06 · Smoke chamber
The smoke chamber is located just above the firebox and guides smoke into the flue.
- Creosote can accumulate, increasing fire risk.
- Unsmoothed surfaces can cause turbulence, reducing efficiency.
- Cracks can allow smoke to escape into the home.
07 · Damper
The damper is a movable plate that controls air flow through the chimney, helping to retain heat when the fireplace is not in use.
- Dampers can rust and become difficult to operate.
- Improper sealing can result in drafts.
- Creosote buildup can prevent proper closure.
08 · Firebox
The firebox is the chamber where the fire burns, typically made of fire-resistant brick or metal.
- Bricks can crack from repeated heating and cooling.
- Mortar joints may deteriorate over time.
- Metal components can warp or rust.