I am having a new home built and while walking thru the basement I noticed a crack running vertically from the top of the wall to the bottom of the wall. What is the cause of this and is this a concern.
I also located two low spots, 2'X4' rectangles, about 1' apart that are approximately 1/2" lower that the remainder of the floor. The are starts about 1' from the wall and extends towards the center of the basement.I suspect the low spots are a poor job on the finishing of the concrete.