Dupont's 3 in. x 24 in. x 96 in. 3 in. x 24 in. x 96 in. Styrofoam ST-100 Highload-60 Square-Edge Insulation Board, Gray supports efficient installation and long-term durability across commercial and industrial construction settings. The square-edge profile allows for tight seams and uniform coverage, helping maintain a continuous insulation layer. Its lightweight yet durable design simplifies handling and cutting, making it a practical choice for under-slab insulation, foundation walls, and other load-bearing applications where strength and thermal efficiency are critical.