There are foundations and then there are basements. Foundations hold the house up, but basements are where people live, do laundry, work on projects, or sometimes bail out the rising tides. Here to we are not endorsing products just giving food for thought and ways to make the unlivable livable.
Basements and foundations go hand in glove. To understand why there may be a problem with the basement, you need to have an idea of how it may be constructed.