Advice on buying a house please?

Hello, I have just put an offer in on a house and had it accepted. The survey has come back with a few concerns - the side of the house has damp from a drain pipe which has overflowed on many occasions. The surveyor has said the sale can proceed but has suggested that maybe a floorboard joist in the front of the house may be rotten, due to the damp, and the back kitchen has a concrete floor. I think the flooring in the kitchen has been replaced because of rot. Its a 1930's 2 bed house in Shorpe with a side door so if anyone knows if this is the case please let me know. Also any advice on how to proceed and get it checked out without spending more money would be great! Thanks