Most common chimney caps are made of sheet metal, and provides a barrier that prevents rain and snow from coming in through the chimney and collecting behind the fireplace walls. Some caps have an aerodynamic design that prevents the wind from creating a downdraft. These caps feature baffles as well as a solid top. As the fire sends creosote-laden particles out the chimney, these can accumulate on the cap, especially if it has baffles, and eventually block air flow.
BJ’s Chimney Service can repair all types of chimney caps to prevent further damage and leave the exterior of your house looking amazing.