Every chimney should be finished with a concrete or metal cap, to protect it from the elements. If properly installed, a concrete cap should have an overhanging edge to provide protective covering for the masonry work beneath it. The top of the cap should have a built-in pitch to allow water to drip down. A lack of such protection will significantly speed up the deterioration of masonry work on your chimney.

Form placement before custom concrete cap pouring		Rebuilt chimney with new metal rain cap