[clancy]

Originally Posted by mad1

What are the possible causes for the vertical crack in the foundation wall? I also noticed a crack in the floor, is this acceptable for work that is less than two months old?

Poured concrete is prone to shrinkage cracks.
In the instance of the floor, control joints are usually placed so that the cracks will follow the control joint. So it is normal for the floor to have cracks but in your case they may not be cosmetically appealing since it sounds like they did not follow control joints.

On the walls, I always use blocks since they are pre shrunk and do not get shrinkage cracks. I am not aware of the control methods for poured walls.