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, acting as a cover to prevent rain, debris, and animals from entering the flue.
- It can become damaged or dislodged due to weather.
- Rusting or deterioration might occur over time.
- Blockages from debris can impede its function.
PART 02
Crown
The chimney crown is a protective concrete or stone top surface of the chimney, designed to shed water away from the flue and masonry.
- Cracks can form, allowing water to seep in.
- Deterioration from weather exposure.
- Poor construction can lead to ineffective drainage.
PART 03
Flashing
Flashing is the metal or waterproof material that seals the joint between the chimney and the roof to prevent water leaks.
- Corrosion or rust leading to leaks.
- Improper installation can cause sealing issues.
- Shifting or settling can create gaps.
PART 04
Brick and mortar
These are the bricks and mortar that make up the structure of the chimney, giving it stability and aesthetic appeal.
- Mortar joints can degrade over time.
- Bricks may crack from freeze-thaw cycles.
- Spalling bricks due to moisture penetration.
PART 05
Flue liner
The flue liner is a layer inside the chimney that protects the masonry from heat and corrosion, while improving efficiency and directing smoke out of the home.
- Cracks or deterioration can occur.
- Blockages from creosote buildup.
- Improper sizing for the appliance.
PART 06
Smoke chamber
The smoke chamber funnels smoke from the firebox into the flue, helping it smoothly exit the chimney.
- Creosote can accumulate, reducing efficiency.
- Cracks can form, allowing gases to escape into the home.
- Poor construction may lead to uneven airflow.
PART 07
Damper
The damper is a movable plate or valve in the chimney that regulates airflow and helps seal the chimney when not in use.
- Rust or warping can prevent proper sealing.
- Debris can obstruct its movement.
- The seal might wear out, reducing energy efficiency.
PART 08
Firebox
The firebox is the area within the fireplace where the fire is contained and burns.
- Mortar joints can crack under heat stress.
- Bricks can spall due to heat exposure.
- Buildup of soot and debris can occur.
01 · Chimney cap
The chimney cap sits at the top of the chimney, acting as a cover to prevent rain, debris, and animals from entering the flue.
- It can become damaged or dislodged due to weather.
- Rusting or deterioration might occur over time.
- Blockages from debris can impede its function.
02 · Crown
The chimney crown is a protective concrete or stone top surface of the chimney, designed to shed water away from the flue and masonry.
- Cracks can form, allowing water to seep in.
- Deterioration from weather exposure.
- Poor construction can lead to ineffective drainage.
03 · Flashing
Flashing is the metal or waterproof material that seals the joint between the chimney and the roof to prevent water leaks.
- Corrosion or rust leading to leaks.
- Improper installation can cause sealing issues.
- Shifting or settling can create gaps.
04 · Brick and mortar
These are the bricks and mortar that make up the structure of the chimney, giving it stability and aesthetic appeal.
- Mortar joints can degrade over time.
- Bricks may crack from freeze-thaw cycles.
- Spalling bricks due to moisture penetration.
05 · Flue liner
The flue liner is a layer inside the chimney that protects the masonry from heat and corrosion, while improving efficiency and directing smoke out of the home.
- Cracks or deterioration can occur.
- Blockages from creosote buildup.
- Improper sizing for the appliance.
06 · Smoke chamber
The smoke chamber funnels smoke from the firebox into the flue, helping it smoothly exit the chimney.
- Creosote can accumulate, reducing efficiency.
- Cracks can form, allowing gases to escape into the home.
- Poor construction may lead to uneven airflow.
07 · Damper
The damper is a movable plate or valve in the chimney that regulates airflow and helps seal the chimney when not in use.
- Rust or warping can prevent proper sealing.
- Debris can obstruct its movement.
- The seal might wear out, reducing energy efficiency.
08 · Firebox
The firebox is the area within the fireplace where the fire is contained and burns.
- Mortar joints can crack under heat stress.
- Bricks can spall due to heat exposure.
- Buildup of soot and debris can occur.