What does apron flashing do in roofing?

Apron flashing plays a crucial role in roofing by providing a protective barrier at the junction where a sloped roof meets a vertical wall. This area is particularly susceptible to water infiltration, as rainwater can collect and flow down the slope, potentially seeping behind the roofing materials and into the building structure. By directing water away from this vulnerable juncture and onto the roof surface, apron flashing helps prevent leaks and water damage.

The material typically comes in various metals and is expertly installed to ensure it overlaps with the roofing materials, thus enhancing its effectiveness. This strategic placement and design significantly reduce the risk of moisture intrusion, making apron flashing an essential component for maintaining the integrity of roofing systems.