What is the function of drip edge flashing?

Drip edge flashing serves a crucial role in protecting the sheathing and underlying materials around the roof's perimeter. It is designed to direct water away from the edges of the roof, preventing it from splashing onto the roofing materials and the sheathing below. This diversion helps to minimize water infiltration that could lead to damage such as wood rot, mold growth, or deterioration of the roofing structure. By properly channeling water off the roof and into the gutters, drip edge flashing contributes significantly to the longevity and integrity of the roof. The correct choice emphasizes the protective aspect of drip edge flashing, which is vital for maintaining the health of the roofing system.