Roofing materials continuously are under constant atmospheric effects such as sun, rain, snow, wind, freezing and thawing. It is very important to be known that strength loses at low and high temperatures that the roof tiles are preferred by many users. In this study, changes in the mechanical strength of the roof tiles in -50, +25, +50, +100, +200, +300, +400 C0 were investigated. Flexural tests ... [Show full abstract] carried out on samples prepared and analysed. Strength of the roof tiles has been found to completely lose at +400 C0. It was also determined to increase the strength of water-absorbing and frozen roof tiles.