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Chimney crown vs. chimney cap: what each one does

Learn about the roles of chimney crowns and caps and how they protect your chimney.

2 min read

What Is a Chimney Crown?

The chimney crown is a slab, usually made of concrete, that sits on top of your chimney. Its purpose is to protect the chimney structure from weather elements like rain, snow, and sleet. The crown prevents water from seeping into the masonry, which could cause damage over time.

A well-constructed crown is angled to direct water away from the chimney. Cracks or damage to the crown can lead to leaks and deteriorate the chimney structure, highlighting the importance of regular maintenance and inspection.

Role of a Chimney Cap

A chimney cap sits above the chimney crown and is typically made of metal. Its primary function is to prevent rainwater, debris, and animals from entering the chimney. It also helps to reduce downdrafts that can bring smoke back into the house.

Chimney caps often come with a mesh screen to keep out animals and debris. A missing or damaged chimney cap can lead to blockages from leaves or nests, which can hinder proper chimney ventilation and efficiency.

Why Both Are Important

Both the chimney crown and cap play crucial roles in maintaining the integrity and functionality of your chimney. While the crown protects the masonry, the cap protects the interior space. Together, they safeguard against water damage and blockages.

Regular inspections can help identify issues with either component before they cause significant problems. Fixing a cracked crown or replacing a damaged cap promptly ensures that your chimney system remains effective and reduces the risk of costly repairs.

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