The waterproofness of flat clay tile roofs depends to a certain extent on the quality of roof waterproof materials. Therefore, it is crucial to choose high-quality waterproof materials during roof construction. High-quality waterproof membranes or waterproof coatings can provide an additional layer of protection for flat clay tiles and reduce the possibility of water penetration.

After high-temperature firing, the material structure of flat clay tiles changes, the impurities in the clay are decomposed, the internal pores are reduced, and the density of the tiles is significantly increased. This high-temperature firing process gives flat clay tiles a higher waterproof ability.