Chimney caps are used to prevent animals from nesting inside your chimney and rain and snow from deteriorating the inside of your chimney. Stainless steel mesh within the cap helps as a spark arrestor, and minimizes burning debris from rising out of the chimney. Chimney caps can be stainless steel, copper, Kydex colored steel and more. Ageless Chimney stocks all traditional caps on our trucks, and can also provide custom caps in any shape and size.