What type of concrete forms are designed to remain in place indefinitely?

ICF, or Insulated Concrete Forms, are specifically designed to remain in place after the concrete is poured and cured. These forms are typically made from expanded polystyrene or other insulating materials, which serve a dual purpose. First, they provide structural support for the concrete while it sets, and second, they offer thermal insulation benefits once the concrete has hardened.

The primary advantage of ICF is that they create a continuous insulation layer, which enhances the energy efficiency of buildings. By remaining in place, ICF systems promote better indoor climate control and lower energy costs, making them an increasingly popular choice for construction in both residential and commercial projects.

In contrast, materials like steel, wood, and plastic forms are generally intended to be temporary. They serve as molds during the curing process and are removed once the concrete is sufficiently set. This temporary use limits their usage compared to ICF, which is integral to the structure's performance and longevity.