I have no doubt that my 50 year old house has plugged drain tile. I do get water in my concrete block basement through one wall. I have had some waterproofers come out and give me a estimate, but everyone wants to break up the basement floor, install a interior drain tile, and a sump pump. The grading around the house does need some work, and the gutters are old, and not that great. I was wondering if I regraded, and made sure the ground sloped well away from the foundation, covered the ground around the foundation with plastic, and then with rock, if that could possilbly eliminate the need for me to spend $3000 to get a interior drain tile.