I live in Indiana and have a basement we would like to finish. The first step in doing this was to jackhammer concrete around perimeter and install interior French drain. Started this last night to find out I don't have a footing under the foundation. The basement walls are cinderblock foundation that sits on mainly clay soil. Can I still install French drain at bottom of foundation wall without having a footer? If I trench all around perimeter and not disturb soil under foundation wall will I still have to worry about losing strength in holding up wall? I clearly need something because over night the hole has already filled up with water. Any advice is appreciated, there's not much out there with people experiencing same issue with a solution.