Pre-formed 90 and 45-degree corners are available to speed construction since they are the most commonly used corner angles. Radius walls are easily constructed by miter-cutting the form at the proper angle and using foam to join the edges. Some manufacturers will deliver already curved walls.
One thing to keep in mind is that you have to finish the basement with drywall due to the building code regulations. you can not have an “unfinished” basement due to the styrofoam fumes if it ever catches fire.
An ICF basement should be called a “lower level” since the old stereotypes about basement do not apply to them. An ICF foundation is warm, dry, quiet, comfortable, and provides no opportunity for