What is the usual thickness of drywall used for interior walls?

The typical thickness of drywall used for interior walls is 1/2 inch. This thickness is standard because it provides an adequate balance between weight, strength, and affordability. It is suitable for most residential applications and allows for easy handling and installation.

1/4 inch drywall is generally too thin for interior walls; it is often used for low-impact applications like ceilings or in situations where weight is a concern. On the other hand, 5/8 inch drywall is commonly used in commercial settings or in areas where fire-resistance is required, such as in walls that separate living spaces from garages. Finally, 3/4 inch drywall is not a standard thickness for walls and is rarely used in residential construction.

Understanding these thicknesses helps builders choose the right material for specific applications, ensuring proper insulation, fire safety, and structural integrity in building projects.