What type of chimney should have a concrete, metal, or stone cap?

A chimney cap is an important component of a masonry chimney as it serves several critical functions. It helps to prevent water infiltration, which can cause significant damage to the masonry over time, leading to issues like spalling, cracking, or the deterioration of the chimney structure itself. Additionally, a properly designed cap aids in preventing the entry of debris, animals, and downdrafts, which can affect the efficiency and safety of the fireplace or stove connected to the chimney.

When referring to all masonry chimneys, it encompasses any chimney that is constructed from brick, stone, or concrete masonry. This requirement is applicable regardless of the age, height, or specific design of the chimney, ensuring that all masonry chimneys receive the necessary protection that a concrete, metal, or stone cap provides.

In contrast, options that limit the requirement to only specific types or conditions of chimneys miss the broader necessity of capping all masonry chimneys. A universal cap protects all masonry structures, reflecting best practices in chimney maintenance and safety, making it clear why this is the correct choice.