not sure why any 1 would assume the rule is diff for that map, it's literally the exact same thing, only thing that has changed is the objective... and given the T's need 2 exit the house, you could easily just lay fire on the house for 20 seconds, wait for the 20 seconds 2 be over and just go ward the shit out of the house lol and pwwn the T's.......
so in short, do not ward the house on crackhouse, as the rule has always stated.