 This sense of screed has been extended to asphalt paving where a free floating screed is part of a machine that spreads the paving material.A "weep screed" or "sill screed" is a screed rail which has drainage holes to allow moisture which penetrated an exterior plaster or stucco coating to drain through the screed.Flowing screeds are made from inert fillers such as sand, with a binder system based on cement or often calcium sulphate.