No seriously, they weren’t using it as some kind of structural insulation:
Polystyrene window frame shock for house buyers [The Star]
BUTTERWORTH: Several house buyers in Taman Ampang Jajar here had a rude shock when they checked the houses – the outer frames of their windows were made from polystyrene.
A buyer, Lee Kim Tatt, 35, claimed that the polystyrene pieces were covered with a thin layer of cement.
…
A representative for the project’s architect said the frames were merely decorative pieces that should not be stepped on.
Unnnn-freaking-believable. I mean, if they were clever they would have at least tried to pass it off as some form of new energy saving insulation.
Note to self: Think twice before buying property back home.