What is the main function of roof flashing?

The main function of roof flashing is to direct water away from critical areas to prevent leaks. Flashing is typically installed around roof features such as chimneys, vents, skylights, and along seams where different surfaces meet. Its primary role is to redirect water, ensuring that it flows off the roof without seeping into joints or vulnerable areas, which could lead to water infiltration and damage over time.

By effectively channeling water away from these critical points, flashing helps maintain the integrity of the roofing system and protects the underlying structures from moisture-related issues. This is vital for extending the lifespan of the roof and for preserving the building as a whole.