Originally Posted by
Trent Tarter
I have been told that by installing an interior drain and sump pump that it can cause significant erosion by constantly pulling water from below the slab and footing.
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Here is a better solution (because I have no faith is surface applied bandages other than those applied to one's skin to allow the skin to heal itself):
Cut a notch into the slab, but not through the slab, around the slab at the cold joint, install a deck drain like that used around pools, sloped to drain to one location and install a shallow sump and pump there.
The only water the above will remove is that "water which leaks in", which is the only water your client is concerned with anyway.