The components of a one-coat system always include a weather resistive membrane, metal reinforcement and the fiber reinforced or one-coat stucco.  The product may be installed over a wide variety of substrates including foam plastic insulation board, exterior gypsum sheathing, oriented strand board (OSB), exterior plywood, asphalt impersonated sheathing and almost any other code approved exterior sheathing.  A substrate is always required; it is not designed for installation over open framing.  It may also be applied to concrete and concrete masonry units with or without metal reinforcement.