Chimney crown vs. chimney cap: what each one does

What is a Chimney Crown?

A chimney crown is a slab, usually made from concrete, that covers the top of your chimney structure. Its primary role is to protect the chimney flue from the elements by channeling water away from the flue opening to prevent erosion and damage.

The crown is designed to extend slightly over the edge of the chimney to act as a watershedding feature, keeping the brickwork below from absorbing moisture. Over time, exposure to the elements can cause the crown to crack, which calls for repairs to maintain its effectiveness.

What is a Chimney Cap?

A chimney cap is placed on top of the chimney crown and serves as an additional layer of protection. It typically includes a mesh screen that prevents debris, rain, and animals from entering the chimney while still allowing smoke to pass through.

Chimney caps are crucial for keeping pests like birds and squirrels out of the flue, which can cause blockages or nests that may create a fire hazard. They also help prevent sparks from escaping, which can be a hazard to the roof or surrounding area.

Why Both are Important

Both the chimney crown and cap play important roles in maintaining the integrity and function of your chimney. A well-maintained crown protects the structure, while a cap ensures safe and efficient operation. Together, they help extend the life of your chimney system.

Routine inspections help ensure that both the crown and cap are in good condition. This is important not only to prevent minor issues from becoming costly repairs but also to ensure that your chimney performs effectively and safely throughout the year.