What is a sandwich panel?

• A. A panel that adds an insulation layer and a non-structural exterior concrete wythe to the standard structural concrete layer
• B. An all-steel panel with no insulation
• C. A panel used for interior walls only
• D. A panel to create curved surfaces

Answer: (A)

A sandwich panel is a wall assembly with an insulation layer between two concrete facings, where the inner layer provides structural capacity and the outer layer is non-structural. In tilt‑up construction this means an inner structural concrete panel plus an exterior non‑structural concrete wythe, with insulation sandwiched between them. This configuration delivers thermal performance and reduces heat transfer while keeping the exterior facade in a form that doesn’t carry the main loads. The described panel matches this definition by adding an insulation layer and a non-structural exterior concrete wythe to the standard structural concrete layer.