What is kick-out flashing primarily designed to do?

Kick-out flashing is specifically designed to manage water flow on roofing systems where a roof meets a wall. Its primary purpose is to direct water runoff away from the walls of a structure, thereby preventing moisture accumulation that could lead to water damage or the growth of mold and mildew. By effectively channeling the water away from the building's side, it helps maintain the integrity of both the roof and the wall, ensuring a longer lifespan for these components of the structure.

In contrast, the other options do not accurately describe the function of kick-out flashing. While aesthetic appeal, structural support, and insulation are important aspects in roofing and construction, they fall outside the intended role of kick-out flashing, which is focused solely on the management of water runoff.