It is related to the local climate and environment, the tiles selected for the roof, the color of the tiles and the age of the building.
Climatic environment, such as ultraviolet rays, high air alkalinity (seaside), acid rain corrosion, etc. , will accelerate the color aging of tiles, resulting in fading and discoloration of tiles.
The color of tiles is post-treatment, spraying or glazing. Poor quality of tiles leads to fading.
Tiles with special colors are easy to fade, such as bright colors, red, sky blue, golden yellow and so on.
All tile colors have a service life, generally around 10 years. No matter what kind of tile, after 10 years, the color will change, either discoloring or fading.
Spray renovation treatment can be considered.