Patent ID: 7797884

Claim:
A flexible flashing for use in a portal installation in a curved opening of a wall, the flashing comprising: a base member defining opposite first and second surfaces extending from a first edge to a second edge, the first surface of the base member defining a plurality of channels configured to direct water in a direction from the first edge of the base member to the second edge of the base member; and a face plate extending from the base member in a plane generally perpendicular to the base member, the face plate defining a first edge proximate the base member and extending therefrom to a second distal edge, such that the face plate is structured to be disposed against an outer surface of the wall with the base member disposed against the curved opening of the wall and the channels configured to direct water on the base member outwardly from the wall, wherein the face plate includes a plurality of slots or corrugations extending in a direction from the second distal edge of the face plate toward the first edge of the face plate such that the base member can be flexed to the curved configuration of the opening, and wherein each channel is defined by opposing side walls that diverge from each other in the direction toward the second edge of the base member such that each channel defines an increased width at the second edge, wherein the flashing defines opposite ends, and wherein at least a plurality of said channels adjacent at least one of said ends includes two side walls, with at least the side wall closest to the adjacent end being undercut so as to be able to capture water in the associated channel when the portion of the flashing containing the channels with the undercut side wall being disposed substantially in a vertical direction.