Re: Well, you say that but ...
Basements is weird. A mate of mine inherited a 15thC cottage with a massive earth cellar seemingly just dug into the ground. It was dry as a bone even when modern cellars on the same street flooded. One neighbour even offered to pay a small fortune to drill into the earth walls and floor to see what they'd done 600 years ago that worked so well. Didn't occur to him it might spoil the seal.