What is the purpose of a drain on a roof?

The purpose of a drain on a roof is to collect and direct runoff water. Proper drainage is crucial for the longevity and integrity of the roofing system. When it rains, water accumulates on the roof surface, and if not adequately drained, it can lead to water pooling, which may cause leaks, structural damage, and deterioration of roofing materials over time. The drain serves the essential function of channeling this water away from the roof, ensuring that it flows efficiently to drainage systems or gutters and ultimately away from the building. This helps to maintain the roofing structure by minimizing the risk of water-related issues.

While aesthetic appeal, modifications to roof structure, and wind load concerns are important factors in roofing design and construction, they do not address the primary function of a drain. The focus on managing water runoff through proper drainage is fundamental to roofing practices.