What material is commonly used in the construction of interior walls?

The material commonly used in the construction of interior walls is drywall. This is primarily because drywall is specifically designed for interior applications, offering a smooth surface that can be easily finished with paint or wallpaper. It is composed of a core of gypsum sandwiched between two sheets of thick paper, which makes it lightweight, easy to install, and cost-effective.

Drywall also provides fire resistance, acoustic properties, and is easily repairable, making it a preferred choice for residential and commercial construction. Its versatility accommodates both standard wall framing and more complex layouts, contributing to its popularity in the industry.

Other materials, while used in various applications, do not serve as the primary choice for constructing interior walls. For instance, concrete is heavier and generally used for structural elements or external walls, wood paneling offers aesthetic qualities but is not typically used for the structural framework of walls, and plywood is better suited for floor sheathing or other specific applications rather than as an interior wall material.