Effect of water absorption on frost resistance of clay roofing tiles

High frost resistance is one of the signs of good quality in clay roofing tile products. The present paper deals with the question of whether the water absorption of clay roofing tiles affects frost resistance. The results show that clay roofing tiles with high water absorption can be just as frost proof as tiles with lower absorption. Median pore radius is found to be an important factor in determining frost resistance: increasing the median pore radius increases frost resistance.