While not necessarily required, weather caps and spark arrestors are recommended for chimney terminations. Weather caps help to keep water out of the chimney. Spark arrestors help to keep burning embers from setting fire to your house and the neighbors houses.
Weather caps also help to keep out non-paying renters, such as birds, squirrels and raccoons. I took this picture this week at a house in Raytown, and thought I’d share it. This is a view looking down a chimney from the roof. Thats a raccoon staring back, with an entire family down there as well.