What is the required gypsum thickness for garage walls adjacent to non-habitable areas?

What is the required gypsum thickness for garage walls adjacent to non-habitable areas?

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

Answer: (A)

In residential building codes, the thickness of gypsum board (drywall) used for specific areas such as garage walls adjacent to non-habitable spaces is primarily determined by fire resistance and safety requirements. The correct requirement for this application is 1/2 inch thickness. This standard is generally prescribed because it provides adequate fire protection while being cost-effective and manageable for building contractors. Gypsum board of this thickness is typically suited for separating garage spaces from living areas or non-habitable areas, as it helps to prevent the spread of fire and smoke. In contrast, thicker options like 5/8 inch or higher would be more appropriate for walls that require superior fire resistance, such as those separating different occupancy types or in commercial settings. Thus, using 1/2 inch gypsum around garage walls is both compliant with the building codes and practical for the intended use.

In residential building codes, the thickness of gypsum board (drywall) used for specific areas such as garage walls adjacent to non-habitable spaces is primarily determined by fire resistance and safety requirements. The correct requirement for this application is 1/2 inch thickness. This standard is generally prescribed because it provides adequate fire protection while being cost-effective and manageable for building contractors.

Gypsum board of this thickness is typically suited for separating garage spaces from living areas or non-habitable areas, as it helps to prevent the spread of fire and smoke. In contrast, thicker options like 5/8 inch or higher would be more appropriate for walls that require superior fire resistance, such as those separating different occupancy types or in commercial settings. Thus, using 1/2 inch gypsum around garage walls is both compliant with the building codes and practical for the intended use.