How Do Chimney Caps Work? What Atlanta Homeowners Should Know
Chimneys are built to vent smoke out of a home, but that same opening exposes the flue to rain, debris, sparks, and wildlife looking for shelter. A chimney cap addresses these risks with a single fixture. Understanding how it works and what can go wrong when it is missing or damaged shows why this small component plays such a significant role in a chimney's overall performance. What a Chimney Cap Actually Is A chimney cap is a cover installed at the top of a chimney flue, typically made of metal and fitted with a mesh screen around the sides. It sits above the crown, the flat surface at the top of the chimney structure, and is sized to match the flue's dimensions so it seals tightly without restricting airflow. While it looks like a simple accessory, it performs several distinct functions at once. The Basic Mechanics Experts from Chimney Caps Atlanta explain that a chimney cap covers the flue opening while leaving gaps around the sides for smoke and combustion gases to exit. T...