Have been in our house for over 10 years which was built in 1958 which has never been framed at all. (1) There is a grey beam down the middle of the structure, floor was heaved on one side of basment with cracks in wall(was told this was from back filling to soon). I have landscaped and have eliminated any moisture leaks over the the last 4 years. Was thinking of putting a sub floor in over this section to avoid jackhammering, and would raise floor equal to the grey beam, would this be okay and any suggestions on properly doing this to avoid having to tear up beacause of any problems. (2) Other side of the grey beam is level but a small section of floor has a bad case of alkali and surface peeling (blistering). This was also fixed by replacing the below ground broken pipe from sink and dishwasher which I assume was the initiall problem and now has been dorment for the last 4 years also. Height is a problem so was wondering how to properly finish this and what to use up to the final covering.