It's now very common to find flooring grade chipboard used instead of natural timber on suspended timber floors, since it is cheaper and easier to lay. The sheets are tongued and grooved just like floorboards, and are laid in the same way with joins between sheets positioned above the centre line of the floor joists.

As the sheets are laid, it's best to stagger the joins in adjacent rows, starting the next row with the off cut from the previous row. Trim sheets as necessary to fit round obstacles.