A proper chimney crown should provide an overhang projecting beyond all sides of the chimney by a minimum of _____ inches?

A proper chimney crown is essential for protecting the chimney structure from water damage. It serves to channel water away from the top of the chimney and prevent it from infiltrating the masonry below. For a chimney crown to be effective, it should extend beyond all sides of the chimney.

The minimum projection of 2 inches beyond the chimney is important because it helps ensure that water drains away from the chimney walls, reducing the risk of leaks and deterioration of the masonry. A projection that is too small could lead to water pooling at the edges, which could lead to premature wear and damage.

By requiring this minimum overhang, building codes and best practices aim to enhance the durability and longevity of the chimney system while minimizing the potential for costly repairs due to water damage. This standard value is recognized in the industry as essential for adequate drainage.