Due to the widespread use of standard ceiling ionolite in the field of production of roof foam, the Iranian Standards Organization has collected 11108 for polystyrene expansion and its products. In this standard, all the specifications of the roof block are specified in detail, the most significant of which is at least a density of 12 kg / m3, and another important indicator is the degree of slow burning, which is clearly grade E. Unolite Imran Gostar has been able to obtain the standard since 1988 and with the help of the standard equipped laboratory, it produces the best roof blocks.