What is the correct specific gravity (SG) setting for OSB, Plywood or MDF?

Plywood and OSB

Specific GravityPlywood, OSB and MDF
0.57Plywood Subfloor and Sheathing
0.62Oriented Strand Board (OSB)
0.70PermaCore® MDF

Specific Gravity Correction Value Sources

This specific gravity (SG) correction value was developed by Wagner Meters. These values are based on our research and have been developed to give users a general correction factor for plywood & oriented strand board (OSB). Please keep in mind that plywood & OSB manufacturing processes can differ slightly and some plywood and OSB of the same species may vary slightly.

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