Isoray is a precurved thermo-insulated roof panel. It is designed for roofs that are principally placed on prefabricated structures made of prestressed concrete: it guarantees waterproofness, high thermal insulation and high load resistance. The 5 ribs of the profile show excellent robustness and resistance. Made with 3.3 m or 6 m radius of curvature, Isoray is the ideal solution for the prefabricator because it represents a good alternative to fibre concrete curved plates or arched plates.