Building with 3D Cementitious Sandwich panels is in demand, for Eco Friendly, or disaster prone areas when considering rebuilding after a natural disaster. This list of projects begin over 2 decades and continues to grow. This sustainable building material is used in conjunction with all of the building trades. It may be used in place of wood or metal-framed walls, masonry block walls or pre-cast panels. You can also build floors, ceilings and roofs.