The joint where the floor meets the wall is called the cove. Water will seep in through the cove gap where the concrete floor is separated from the block wall by a small opening (usually an eigth of an inch or so).
This gap, if it is not sealed, permits any water below the floor to seep through because of hydrostatic pressure under the floor.

Cove leaks are covered in Section H of The Home Waterproofers Manual – Home Waterproofing A to Z. I’ve used this same knowledge every day to fix water problems. It will work for you too. If you have water problems, you can fix them fast, for less than you might think, and have a dry, healthy and livable home again. Don’t put yourself at the mercy of high priced waterproofers. You can save thousands of dollars by learning what is going on first.

You can save thousands of dollars and many headaches by learning what is going on first. Often what looks like an expensive and serious problem may not be. Once the problem is explained, solving it is just common sense. I’ve used the knowledge I’ve put in The Home Waterproofers Manual – Home Waterproofing A to Z every day to fix water problems. It will work for you too.

But remember, when dealing with salesmen, in the waterproofing business it’s “buyer beware”. Most get a percentage of the sale and don’t consider it their job to save you money. They charge as much as they can. If they see a problem that can be fixed at low cost, or one that has a simple solution, they won’t mention it, but will only talk about “preventing serious damage” and try to scare you into signing a big contract.