Chimney crown vs. chimney cap: what each one does

What is a Chimney Crown?

A chimney crown is a slab, typically made of concrete, that covers the top of the chimney. Its main purpose is to protect the chimney structure below from weather damage, preventing water from seeping into bricks and mortar.

A well-constructed chimney crown will have a slight slope to direct water away from the flue opening. Cracks or damage to the crown can lead to significant water damage, affecting the chimney's durability over time.

What is a Chimney Cap?

A chimney cap is a metal cover that sits on top of the chimney crown. It includes mesh or screens to keep out animals, leaves, rain, and other debris while allowing smoke and gases to escape.

Chimney caps are crucial for preventing downdrafts and can also help keep rain from directly entering the flue, which helps prevent odors and moisture-related issues inside your home. They are an affordable investment to protect your chimney.

Why Both are Important

Both the chimney crown and cap play vital roles in safeguarding your chimney system. While the crown keeps the overall structure intact and prevents water damage, the cap adds an extra layer of protection against debris and animals.

Proper installation and maintenance of both components can prolong the life of the chimney, enhance its performance, and reduce the need for costly repairs. They work together to ensure your chimney functions efficiently and safely.