Polystyrene is lightweight and thus constitutes less load on the roof structure and building in general, thereby making the building last longer.
Polystyrene Ceiling is water/moisture resistant. It doesn't degrade or deteriorate like POP on prolonged exposure to water.
Polystyrene is very versatile in design. You can achieve any design you wish, including circular designs.
Polystyrene has lifetime durability. It lasts as long as the building stands. Specifically, 75 years lifespan.