What role does Base Flashing play at roof-to-wall junctions?

Base flashing serves a crucial function at the roof-to-wall junctions by providing a waterproof barrier that protects the integrity of the roofing system. It effectively covers the edges of the field membrane, ensuring that water does not penetrate behind the membrane or into the walls where it could cause damage. By sealing the junction between the wall and the roof, base flashing helps direct water away from these vulnerable areas, reducing the risk of leaks and subsequent structural issues.

While insulation, aesthetics, and structural support are important aspects of roofing, they are not the primary role of base flashing. Insulation focuses on temperature control, aesthetics involves the visual characteristics of the roofing system, and structural support pertains to the stability and strength of the building. None of these functions directly relate to the protective and sealing purpose of base flashing at roof-to-wall junctions.