Construction Supervisor License Practice Exam

What is the standard thickness of drywall typically used for interior walls?

1. 1/4 inch

2. 1/2 inch

3. 5/8 inch

4. 3/4 inch

The correct answer is: 1/2 inch

The standard thickness of drywall typically used for interior walls is 1/2 inch. This thickness strikes a balance between providing sufficient strength and soundproofing while being easy to handle and install. It is the most common choice for residential construction, as it meets building codes for most applications where insulation or extensive fire resistance is not a primary concern. Other thicknesses are available for specific applications: 1/4 inch is often used for curved surfaces or as a veneer over existing walls, while 5/8 inch drywall is generally used in areas requiring additional fire resistance, such as garages or commercial spaces. 3/4 inch drywall is less common for standard interior walls, as it can be harder to handle, more expensive, and may not provide any additional benefit over the standard 1/2 inch for most residential needs. Understanding these thicknesses helps in selecting the appropriate drywall based on the specific requirements of a construction project.