StoneCoat says its Fusion system replaces four layers of materials used in exterior wall systems: exterior insulation, sheathing, water and vapor barriers, and metal lath. Compatible with most exterior claddings, the carbon-neutral panels feature structural insulated sheathing and integrated masonry backing. Panels with standard 2-inch foam are rated at R-10; foam up to 6 inches thick is available. Seams are sealed with composite laminate tape to form a continuous air and water barrier. The company’s cladding can bond directly to the panels.