What is the main purpose of installing copings on parapet walls?

The main purpose of installing copings on parapet walls is to prevent water infiltration. Copings are typically made from materials such as metal, stone, or concrete and are designed to cap the top of parapet walls. Their sloped design directs rainwater away from the wall structure, helping to safeguard the underlying building materials and prevent water from seeping into the parapet or the building itself. This is crucial in maintaining the integrity of the roof systems and preventing damage that can arise from moisture accumulation, such as mold growth or deterioration of structural elements.

While enhancing fire resistance and improving aesthetics can be additional benefits of copings, they are secondary to their primary function of water management. Similarly, copings do not serve as a means of ventilation, which is another distinct function typically addressed through other architectural features. Therefore, the primary focus of copings is the prevention of water infiltration, which helps ensure the longevity and durability of the roofing system and the building it protects.