Every chimney needs a cap for the same reason every house needs a roof. A chimney cap can prevent rain from entering the chimney causing the damper and metal firebox to rust as well as causing damage to the flue liner.cleansweepaa-chimneycaps In addition to prevent water entering a chimney cap prevents raccoons, chimney swifts, bats, squirrels, and other animals from entering the chimney. Squirrels, raccoons and birds are drawn to chimneys because they provide a safe place for their young. These animals not only can bring mites, ticks, fleas, and other parasites, but can cause a blockage in your chimney which would not allow the products of combustion to vent to the outside like they should.

A stainless steel chimney cap with wire mesh that is small enough to keep animals out but large enough to allow the products of combustion to escape. Having a chimney cap installed on your chimney is by far the most economical way to prevent water and animals from entering your chimney.