What is a chimney cap? A chimney cap is a protective cover that is installed on the top of a chimney to keep rain, snow, debris, and animals out of the chimney. It also helps to prevent downdrafts and improve the efficiency of the chimney. moduet2023-06-29T03:16:11+00:00June 29th, 2023|Chimney| Share This Story, Choose Your Platform! FacebookTwitterLinkedInPinterest