Patent ID: 8661741

Claim:
A flashing for a cavity wall, said cavity wall having an inner wythe and an outer wythe with a cavity therebetween, said cavity wall having an exterior surface on the side of said outer wythe opposite said cavity, said flashing comprising in combination: a sulcated polymeric membrane having an elongated body, two major surfaces and a longitudinal axis, said polymeric membrane selected from a group consisting of low density polyethylene, high density polyethylene, polyethylene teraphalate, polypropylene, styrene isoprene styrene, styrene ethylene butadiene styrene, styrene ethylene propylene, and admixtures thereof; a plurality of channels having continuous and uninterrupted channel walls in at least one of said major surfaces of said polymeric membrane, each of said plurality of channels transverse said longitudinal axis and extending edge to edge of said polymeric membrane providing a conduit for air and water vapor to flow into and out of said cavity and for fluids to flow out of said cavity; a protective member extending over at least a portion of each said plurality of channels precluding the blocking thereof by mortar droppings and construction debris, said protective member permitting water to flow into each of said plurality of channels; an adhesive layer disposed on one of said major surfaces of said membrane; and, a release sheet disposed on said adhesive layer, said release sheet being removable prior to mounting said masonry flashing in said cavity of said cavity wall.