A friend came over to our house and used the third floor bathroom. We didn't realise that there was a huge problem with that toilet. When the friend flushed it it started to pour out water, whiched leaked through the floor and ceiling to the second floor bedroom beneath it and down to the kitchen beneath that. As much of the water was mopped up as possible, but we're worried about mold growing in between the floors. Is there anything we can do to prevent this aside from ripping out all the wet stuff and replacing it?