Foundation Term Form boards are boards that are used to form up or build the form used to hold in the concrete until it has set up and become hard. Before the form boards can be set in place the building has to be laid out with the use of batter boards. Once the batter boards have been put in place, strings are used to lay out the perimeter of the house. The form boards will then be installed in place using the strings as a guide for the house foundation. The height of the strings will determine what size lumber will be required for the form boards. Stakes are used to hold the form boards in place. Other angle stakes are also used in order to strengthen the form boards. Form boards are very important because if they're installed incorrectly they can affect the elevation of the foundation as well as the dimensions. Depending on the soil condition and compaction, metal or wood stakes can be used. Metal forms are often used in commercial construction and also for creating curves or radius concrete.