Hi @sjejani,
Painting roof tiles can help with longevity, but it is not always essential. It really depends on what the roof tiles are made of, concrete or terracotta and looking at them, they could be either, but concrete seems more likely.
If the tiles are terracotta, painting is rarely recommended. Terracotta does not accept coatings as reliably, and the coating can peel or flake later. Terracotta lasts a very long time on its own, provided the tiles are not broken.
Roof tile coatings are mainly useful for concrete tiles. Over time, concrete tiles lose their surface layer and become more porous. This can make them fade, absorb more moisture, and slowly weaken. A good quality roof membrane or roof paint can restore the surface, reduce porosity, improve water shedding, and protect the tile from further weathering. In that situation, painting can extend the life of the tiles and improve their appearance at the same time.
Your roof looks a little bit weathered, but I think it would be easy enough to just give it a clean, rather than painting it. I can't tell from the photos alone how weathered the actual surface of the tiles is.
Maybe it would be worthwhile having a roof restoration company come out and have a look and provide a quote. As roof restorations are specialised work, their opinion, having worked in the field, will be more valuable than mine.
Allow me to tag @Dave-1, @AlanM52 and @Nailbag to see if they have any thoughts.
Jacob
