What is the purpose of drips in a flashing? Can they be omitted when sealant is bonded to the underside of the flashing?
Edges of flashings are bent downward at an angle to form a drip so that any water reaching the drip is shed away from the face of the wall. If a drip is not provided, water that reaches the top surface of the flashing can cling to the underside of flashing, flow back to the face of the wall and under the flashing. When sealant is placed between the bottom surface of the flashing and the top of the masonry below, drip edges are not absolutely required for the flashing to perform. If the drip is eliminated, the sealant will stop the water from re-entering the wall. But adding a drip would force water to shed away from the sealant bond surfaces.