Interior walls are vertical structures that divide the space within a building. They provide privacy, support, and can help with sound insulation. Common materials used for interior walls include drywall, plaster, and wood. These walls can be painted or decorated to enhance the aesthetics of a room. In addition to their functional roles, interior walls can also be used to create different areas within a space, such as bedrooms, living rooms, and kitchens. They can be designed as load-bearing or non-load-bearing, depending on their purpose in the overall structure of the building.