What is the purpose of a scupper on a roof?

A scupper serves a critical function in the design of a roof by facilitating drainage. It is an opening in a wall or parapet that allows water to flow off the roof, directing rainwater away from the roof surface and preventing water accumulation. This drainage feature is essential for maintaining the integrity of the roofing system, as standing water can lead to leaks, structural damage, and other complications over time.

There are various other roofing elements that might serve different purposes. For instance, insulation is an important aspect of roofing systems but is handled by different materials and designs, not by scuppers. Aesthetics can certainly be a consideration in roofing design, but scuppers typically prioritize functionality first. Additionally, while solar panels provide energy solutions, their installation is unrelated to the drainage functions performed by scuppers. Thus, the primary and most relevant role of a scupper is to facilitate effective drainage, making it an essential component in roofing systems.