I’m stumped. Todays inspection was an older home that had a garage with a basement added on. The garage floor is spancrete with poured concrete over it. A set of stairs goes to the basement area under the garage. There are no water pipes on the lower level under the garage, there was no sign of water leakage from the floor above which is the garage area and the home has been empty for 9 months. The water was pooled in the center of the lower level floor. No signs of where it may have come from. Is it possible for the spancrete to sweat. If the bottom side of the spancrete is cool because its below grade and the upper level in the garage is hot (it was 95 degrees last week) can this be condensation?
Since the water was concentrated into one area of about 5 feet around it just didn’t seem like that could be what caused it.