Do you have animals getting into your fireplace or furnace through your chimney? You need a chimney cap. Even if you have a fairly new home that is less than twenty years old, the original cap installed by the builder may fail because it has rusted. In many cases, there is no chimney cap at all. Bobby Installs Chimney Cap Here is a multi flu chimney that is completely open to animal penetration and is also vulnerable to natural deterioration by the weather because the crown is crumbling. Now, here is that chimney after we have installed new stainless steel chimney caps and rebuilt the crown. We also offer a rubberized crown coat. All of our repairs are guaranteed. Close up of our stainless steel chimney cap.