Several years ago my wife and I dug around the foundation of our home (approx. 5' down and tared the walls to help protect and preserve. The walls are poured concrete and the house was built in 1950 on Long Island. We live a few blocks from the canal, but far enough whereby there has never been any flooding. As we prepare to start refinishing the basement, we found sections of the walls crumbling away and we estimate a loss of approximately three to four inches of wall. One area affected is in the laundry room and we fear extends through to the bathroom walls in the basement. The concrete accumulated on the floor in several inches, however, the drywalled walls in the bathroom do not enable us to view the damage. When we tared the outside we also put water proofing on the walls. We are presently searching for someone to make an outside door opening of approximately four feet. Would the contractor who we hire for the aforementioned job be able to resurface the concrete walls? There are a few cracks in the foundation but we have never had any water leaking from the outside into the basement. We noted a dehumidifyer would help, but what other materials could we use to insulate the concrete wall from the drywalled walls. We want to make it as dry as possible since our daughter will be living in the basement for a short time. We are looking to do the job right, but our funds are not great. We estimated the one job for a drain well and passage into the basement will cost approximately $3,500. Advice most welcomed. Thank you for your attention to our basement problems.