The Seventh Diamond TensoSky ETFE System can be applied as a single layer to create a durable, lightweight glazed roof. Reinforced with cables, lightweight steel, or aluminum for shape and stability, a single-layer ETFE structure is ideal for allowing natural light into buildings, making it perfect for skylights and atrium roofing. Flexible and capable of forming architecturally unique shapes, ETFE foil is also popular for use as an architectural building façade.