What is the standard thickness of fiberboard sheathing that is NOT used to attach to wall frames?

Fiberboard sheathing is commonly used in construction for its insulation properties and as a structural element. The standard thicknesses for fiberboard sheathing typically range from 1/4" to 5/8", depending on the application and structural requirements.

The correct answer highlights that 3/8" is not a standard thickness for fiberboard sheathing used in wall applications. While 1/4", 1/2", and 5/8" are prevalent choices for wall framing, 3/8" is less common. It may be used in specific situations or applications, but it is not recognized as a standard thickness in typical wall construction practices.

Understanding the conventional thicknesses is essential for proper framing and insulation performance, ensuring that the material meets code requirements and provides adequate structural support. By recognizing that 3/8" is not standard, one can better appreciate the importance of adhering to typical dimensions in construction projects.