CarbonCast Insulated Architectural Cladding is a lightweight, insulated precast wall panel for horizontal or vertical use as a non-load-bearing spandrel or column cover. The exterior wall system provides lower embodied energy than solid, 6-in.-thick precast, with weight and cement reductions of about 40%. C-GRID carbon fiber grid trusses connect inner and outer concrete wythes. AltusGroup. 866-462-5887.