How an eaves flashing directs rainwater into the gutter
The drip edge above the gutter is a flashing at the lower edge of the roof slope that helps direct water from the eaves into the gutter and protects the eaves zone. To assess its performance, trace the path of a droplet from higher up the slope to the outlet and check that each lap carries water onward rather than under the previous layer. Shape and position must suit the covering, membrane and ventilation. Simply sliding metal under the first sheet may not suffice, so the detail is matched to the roof layout.

