ICFs, or Insulated Concrete Forms, come in many different designs and sizes. However, all ICFs exhibit similar, key characteristics.
An ICF is typically a large, hollow “block” or “form” made of expanded polystyrene (EPS). Steel rebar is placed in the foundation and the EPS blocks are placed over the rebar. They are then stacked one on top of the other (like legos) to form the wall.
The blocks are filled with concrete. The result is an extremely robust structure that exhibits many advantages and benefits over other building material options such as wood and concrete masonry blocks.