For indoor use in homes and residential structures, tongue-shaped particleboard sheet flooring is structural grade. It's ideal for platform creation, in which the floor construction is put down before the walls are built. The tongue and groove flooring is manufactured from a variety of different materials for use in wet areas such as bathrooms and coastal regions. However, it is the hard-wearing properties of yellow tongue particleboard flooring that makes it the ideal product for domestic installations in cooler areas.