I was playing a siege (My dwarfs attacking, Skaven defending). I took the castle and the Skaven relief force came from outside to retake it. They fired their warpfire thrower weapon into a tower with my dwarfs inside it but neither in Blood in the Badlands or the BRB could we find any rules for flaming ranged weapons firing at buildings. Does anyone know the rules or can anyone supply a page number that I have missed?
Also on the topic of buildings, can standard towers and farmhouses be destroyed by cannon-fire?