Hi, my old building needs to repair. I am very capable but this home is very old. They are pre-dry wall. There are holes in the roof and leaks everywhere. I don't need a contractor as much as I need clear instructions. I mean it is not raining in the living room, but I think they have neglected it too long. There may be structural damage. But I dont have any idea about this. I need your help. Where can I get instructions on old home repair?