What is the purpose of secondary drains or scuppers in roof systems?

The purpose of secondary drains or scuppers in roof systems is primarily for emergency overflow of roof drains. When the primary drainage system becomes blocked or is overwhelmed due to heavy rainfall, secondary drains and scuppers serve as a backup to prevent water from pooling on the roof. This is crucial for maintaining the integrity of the roof system and avoiding structural damage, leaks, or even potential collapse. The design of these components ensures that water can be safely directed away from the building, protecting both the roof and the building's structure as a whole.

Essentials like proper roof drainage are vital in building design and maintenance, as they prevent water accumulation, which can lead to various issues, including mold growth and deterioration of roofing materials over time. By having secondary drainage measures in place, it ensures that the building remains safer during extreme weather conditions.