Roof curved sky lights consist of aluminum profiles and polycarbonate. Aluminum profiles are a special system. The multi-chamber polycarbonate can be: 10 mm, 16 mm, 20 mm, 25 mm. The width of the tape varies from 1500mm to 6000mm and there is no length limit. The light strips are installed on a pre-assembled, heat and waterproof board, which is at least 200 mm above the drainage surface.