In roofing, what is the purpose of a flashing?

Flashing serves a crucial role in preventing water intrusion in roofing systems. It is specifically designed to redirect water away from vulnerable areas, such as joints, seams, or transitions between different roofing materials or structures, such as chimneys, vents, and valleys. By effectively channeling water, flashing helps to avoid leaks and water damage, which can lead to significant structural issues and mold development over time.

Understanding the function of flashing underscores its importance in maintaining the integrity of a roofing system. While securing roofing materials and decorative aspects may be relevant in some contexts, those do not address the critical concern of water management. Similarly, installing solar panels is not a function of flashing but rather relates to renewable energy solutions.