What is the primary purpose of an overhang in roofing design?

The primary purpose of an overhang in roofing design is to protect the wall and foundation from water. Overhangs extend the roof beyond the exterior walls, which prevents rainwater from directly hitting the walls and directs it away from the foundation. This is essential for minimizing water intrusion that could lead to water damage, mold growth, and structural issues over time. Moreover, by keeping the walls drier, overhangs contribute to extending the lifespan of the building envelope and its components.

While aesthetic appeal plays a role, enhancing the building's appearance is a secondary function compared to the critical protective role of the overhang. Although structural strength is important in roofing, overhangs primarily serve the purpose of controlling water drainage rather than contributing directly to the structural integrity. Lastly, while overhangs might provide some support for solar panels, this is not their primary design intent; their main function centers on water protection.