Definitions for "Subflooring"
Keywords:  joists, plywood, laid, floor, dictate
A structural element laid directly on top of the joists. Building codes dictate the required thickness of the sub flooring to provide minimum strength and rigidity.
The plywood or boards beneath finish flooring that, nailed directly to floor joists, provides a structural base for finish materials.
The rough boards that are laid over the joists, usually diagonally.