Parts of a Chimney You Need to Know

You would have always thought that chimney is all about a few bricks and a fireplace. In this article, we bring to you a list of the different parts of a chimney, so that you are familiar and get to know your chimney better, when you have to get your chimney repaired.

parts of a chimney

Exterior parts of a chimney


A chimney is essentially made up of bricks and it forms the foundation for the chimney. Hence, it must always be in a good condition for optimal performance and to ensure safety. In case of cracks or damages, moisture can get inside the chimney unit easily and the structure starts weakening eventually.

Chimney Cap

There is a cap on the top of a chimney that protects it from snow, rain and animals entering the chimney.

Chimney Crown

Similar to chimney caps, chimney crowns are on the top of the chimney. They are not prefabricated and are found in case of masonry chimney. It covers the opening of the chimney and from the cap, the smoke emerges out. It is the main barrier between the chimney and the outside atmosphere.

Chimney Flashing

The region where the chimney and the roof coincide has flashing – which is done to prevent moisture penetration. Typically, it can be made using steel, copper, vinyl etc.

Interior Parts of a Chimney

The interior parts of a chimney are highly crucial to ensure the safe and optimal performance of the chimney. Listed below are the interior parts of a chimney:

Smoke Chamber

Prior to the flue, smoke chamber is the first entry point of the smoke before it moves outdoors. There are sloped walls along a smoke chamber, so that the smoke moves out smoothly. There can be accumulation of soot in this part and hence, cleaning is essential.

Throat Damper

Close to the fireplace damper, there is a throat damper that closes and opens the fireplace to the chimney. The damper should be easy to open and if it hampers the smoke going out, you should replace it.

Chimney Liner

Chimney liners are along the wall of the chimney and are typically made using stainless, steel or clay. They are responsible for driving the smoke up and out of the chimney system. it can be very rigid or versatile to fit your chimney perfectly.


The fireplace typically comprises of firebox and hearth. In this region, the actual fire is lit and it can also involve a few other components such as mantel, glass doors or an insert for the fireplace. In case of fireplaces that are under the floor and run down to the basement, there can also be a cleanout door, ash pit and an ash dump, that are responsible for accumulating the ash so that it can be cleaned.

With so many parts involved in a chimney, the next time your chimney has a problem or is not performing as expected, you would have an idea of where to look at and what the potential problem could be.