Weeps should create an opportunity for the liquid water that has drained down to the top surface of a flashing to exit the core or cavity of the masonry wall on the top surface of the flashing.

One of the first commonly employed weep details was the sash cord or ‘rope’ weep. In some cases, this detail was expanded with sections of the sash cord laid in the cavity and then extended through the wall, usually at a head joint.