ICF is a formwork system made of EPS foam-coated panels of the type that stays in place as a permanent mold for walls, floors and ceilings. Products can be blocks, wall panels, floor panels, and hordie. It can be single layers or multiple partitions connected by plastic or steel couplings. ICF are constructed by using two layers of insulation material that are stacked together to create the casing. Once the concrete has hardened, it becomes a complete structure.