Cut stone with even faces and squared edges, which are laid in horizontal courses “Random” ashlar uses stones of varying sizes which interlock but do not form continuous horizontal or vertical courses “Coursed” ashlar is cut to a regular size but the finish has a rough texture
In the United States especially, a thin facing of squared and dressed stone upon a wall of rubble or brick
Walls or facings of stonework laid in courses of evenly dressed stone with thin joints about 3mm thick, which should be raked out 20mm and pointed during cleaning down