I'm pretty sure arson works on every building roughly the same Even if the building is mostly made of stones, you still have the roof, and it's usually made of crap that burns Needless to mention matresses, curtains, tv set, furnitures etc Anyway, even if the building doesn't collapse or burn entirely because of the fire (let's say it's a cube of concrete only, and nothing else inside), you still have that nasty black smoke that renders it uninhabitable