👉 Substories are a type of building material that is used to create a flat, smooth surface. They are typically made from a variety of materials such as concrete, steel, or stone. Substitutes may be used in various applications, including construction, landscaping, and outdoor use. In the context of architecture, substories can refer to the lower level of a building that is not occupied by occupants but serves as an access point for pedestrians and vehicles. They are often used as part of the