Polysteel Forms® are made from expanded polystyrene, and easily
fit together to create solid walls. The forms are filled with concrete, resulting in
a super insulated wall (especially when thermal mass is calculated) - delivering lower
heating and cooling costs to the homeowner. Each block is
designed to stack and interlock without the need for special tools. The polystyrene
exterior provides a superior curing environment, resulting in a wall, 50% stronger per
square inch.