Which of the following is a listed ICF construction type?

• A. Flat panel
• B. Concrete block
• C. Steel frame
• D. Glass block

Answer: (A)

Insulated Concrete Forms (ICF) are wall systems where the foam forms stay in place as part of the wall, and concrete is poured to create the structural walls. A listed ICF construction type means a recognized method that uses these insulated forms and is approved for use in building codes or product listings. Flat panel refers to an ICF system that uses flat foam panels which interlock to form the wall envelope, providing continuous insulation before the concrete is poured. This type is specifically categorized and listed by ICF manufacturers as a valid construction method.

The other options describe different wall systems that aren’t ICF: concrete block is traditional masonry units assembled with mortar; steel frame relies on a steel skeleton with infill; glass block is a decorative masonry-style option. So the flat panel option is the one that represents a listed ICF construction type.