I have 2 leaks in a 50+ year old poured concrete basement. 1 is the old plugged hole where the septic pipe used to go out. It was plugged years ago when we were hooked up to city sewers. The other leak is a very small crack. Both are approx 3' below grade, and only leak when we have a LOT of rain. I'm preparing to put up an insulated 2x4 wall, so I have to resolve the issue.
I was told to dig down to the cracks on the outside, then paint roofing tar on the foundation, apply sheet plastic to the tar, then back fill.
It sounds reasonable to me, but I wanted to run it by someone with more experience....
Any comments/suggestions???
Thanks,
Gary T.

 

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