Chimney Cap vs. Chimney Damper — What’s the Difference?
Most Maryland homeowners know they have a chimney. Far fewer know what’s actually up there protecting their home. Chimney caps and dampers are two different parts solving two different problems — and confusing one for the other is a surprisingly common and costly mistake. If you’ve ever called a chimney company and heard both terms in the same conversation, you’re not alone. Here’s exactly what each one does, how they differ, and why your home needs both. What Is a Chimney Cap? A chimney cap is a metal cover that sits at the very top of your chimney stack, directly over the flue opening. It has a solid roof on top and mesh sides, which means air and smoke can still pass through freely — but everything else gets blocked. Its job is simple: protect the inside of your chimney from the outside world. A chimney cap keeps out the following: • Rain and snow. Water is the single biggest threat to a chimney. When it gets into an uncapped flue, it sits in the firebox, soaks into the mortar, ...