Ok. Once I eliminate my leaking doorway, and plug up at least 1 crack, that I know of, I may not have a water problem. I've always had, at least a little, water leakage, then this storm. I'm surprised that it takes on the temperature of the concrete. That room has always been the coolest spot in the house. Good in the summer but not so good in the winter. This concrete floor is about 60 years old, if that makes a difference. The entire floor is 22 x 19 for 418 sq foot / 3.3 = 127 tiles. One disadvantage I can think of is these look like they would burn right up in a fire.

https://docs.google.com/spreadsheet/ccc?...amp;usp=sharing