Residential Building Inspector B1Wall Construction and Wall CoveringsEasy
A client is installing plywood paneling directly to wood studs in a bedroom. The paneling is 1/4 inch thick. What is the maximum stud spacing permitted for this application?
- A12 inches on center
- B16 inches on center
- C24 inches on center
- D32 inches on center
Show answer & explanationAnswer & explanation
Correct answer: B. 16 inches on center
According to IRC Table R702.4.2, 1/4-inch plywood paneling applied directly to studs requires a maximum stud spacing of 16 inches on center.
Why the other options are wrong
- A. 12 inches o.c. is permitted but not the maximum allowed for 1/4-inch plywood paneling.
- C. 24 inches o.c. would require a thicker paneling (e.g., 3/8 inch or 1/2 inch) to prevent sagging and provide adequate rigidity.
- D. 32 inches o.c. is far too wide for 1/4-inch plywood paneling and would not meet code requirements for stability.
Wood Paneling Stud Spacing
The maximum permissible stud spacing for wood structural panel wall finishes depends on the panel thickness to ensure stability and prevent deflection.
- 1/4-inch paneling: Max 16 inches o.c. studs.
- 3/8-inch paneling: Max 24 inches o.c. studs.
- Panels must be applied to framing or furring.
Memory trick: Paneling needs studs close enough to keep it flat, like a taught drum skin.