Specific Gravity (SG) Settings for OSB and Plywood
When measuring plywood, OSB and MDF, avoid taking readings over obvious defects, voids or very rough areas, over nails or screws as well as or where sheets are joined. This will result in inaccurate readings. For accurate readings, the material thickness needs to be a minimum of ½” (12.7mm).
|Specific Gravity||Plywood, OSB and MDF|
|0.57||Plywood Subfloor and Sheathing|
|0.62||Oriented Strand Board (OSB)|