What is the primary function of a roof drainage system?

The primary function of a roof drainage system is to remove excess water from the roof surface. This is essential because standing water on a roof can lead to a range of issues, including increased weight on the structure, potential leaks, and deterioration of roofing materials. Proper drainage helps to ensure that rainwater and melting snow are efficiently directed away from the roof, preventing water accumulation that could compromise the integrity of the roofing system and overall building structure. Effective drainage systems typically include gutters, downspouts, scuppers, and drains, all designed to facilitate the smooth flow of water off the roof and away from the foundation of the building, thus protecting it from water damage.