OSB Thickness Guide: 7/16", 15/32", 19/32", and 23/32" Explained
What OSB thickness should I use?
Choosing the right OSB thickness depends on how the panel will be used, along with framing and span requirements, panel rating, and project specifications. Common OSB thicknesses include 7/16", 15/32", 19/32", and 23/32", with applications ranging from wall and roof sheathing to subflooring and other structural uses.
Common OSB Thicknesses and Uses
| OSB Thickness | Common Uses | Key Consideration |
|---|---|---|
| 7/16" | Wall and roof sheathing | A common, economical structural panel used in residential framing |
| 15/32" | Roof and structural sheathing | Provides additional thickness and stiffness compared with thinner sheathing panels |
| 19/32" | Structural sheathing | Offers increased rigidity where a thicker structural panel is required |
| 23/32" | Subflooring | Often available with tongue-and-groove edges for floor applications |
Why the Panel Rating Matters
Thickness is only one consideration when choosing OSB. The grade stamp and panel rating provide important information about how a panel is designed to perform.
Before selecting OSB, make sure the panel meets the framing, span, structural, and other requirements of your particular project.
Frequently Asked Questions
What OSB thickness is commonly used for wall sheathing?
7/16" OSB is commonly used for residential wall sheathing, provided the panel rating and specifications meet the requirements of the project.
What OSB thickness is commonly used for subflooring?
23/32" OSB is commonly used for subflooring and is often available with tongue-and-groove edges designed for floor applications.
Is thicker OSB always better?
No. A thicker panel may provide greater stiffness, but the appropriate OSB depends on the application, panel rating, framing and span requirements, and project specifications.
Find the Right OSB for Your Project
Standard Building Supplies carries OSB in a range of thicknesses and specifications. Drop by the yard or speak with the contractor sales team to find the right panel for your project.
