The Flat Panel UX 2.0 is our thinnest profile flat panel, optimized for insulating interior surface and is versatile enough for use on for floors, walls, ceiling and can be adapted for framed wall construction or other unique conditions. It is a good choice as a sub-flooring base panel and for shipping container builds. It is a 2″ thick closed-cell, injection-molded EPS foam panel that achieves R-8.5 insulation.