What is the minimum thickness requirement for gypsum board?

What is the minimum thickness requirement for gypsum board?

• A. 1/4 inch
• B. 3/8 inch
• C. 1/2 inch
• D. 5/8 inch

Answer: (C)

Gypsum board for standard residential walls and ceilings is typically finished with a thickness of one-half inch. This thickness provides enough rigidity, nail holding power, and overall durability for ordinary interior partitions without adding excess weight or cost. Thicker boards, such as five-eighths inch, are used when higher fire resistance is needed or to reduce sag on ceilings with long spans or heavy fixtures. Thinner options like one-quarter inch or three-eighths inch aren’t generally used for finished walls or ceilings in typical homes because they don’t meet the common strength and fire-performance needs. So, the minimum thickness you’d expect in standard practice is one-half inch.

Gypsum board for standard residential walls and ceilings is typically finished with a thickness of one-half inch. This thickness provides enough rigidity, nail holding power, and overall durability for ordinary interior partitions without adding excess weight or cost. Thicker boards, such as five-eighths inch, are used when higher fire resistance is needed or to reduce sag on ceilings with long spans or heavy fixtures. Thinner options like one-quarter inch or three-eighths inch aren’t generally used for finished walls or ceilings in typical homes because they don’t meet the common strength and fire-performance needs. So, the minimum thickness you’d expect in standard practice is one-half inch.