I just built a home with a walk-out basement. The floors in the basement are not covered with flooring yet. Superior walls were put up 1st. The cement was poured late May 2017 as 1 slab and it's approximately 1900 sq ft. I don't know if they used rebar, because I wasn't there when they poured the concrete.
The concrete did not have cracks in it for about 4 months while the rest of the house was being built. I discovered that the builder did not put the plumbing for the kitchen as per the plans. He had to break up some of the concrete to correct the plumbing.
After they moved the plumbing and filled it again, cracks showed up and they go from where they filled it to 2 of the walls. I would say that they are about 1/8th inch wide now. They started out as hairline, but have gotten bigger over the past few months.
Of course, they need to be fixed before I lay down the flooring. Any suggestions specifically on what the builder needs to do to make it right?
Thanks for any advice you can provide.
Adding picture of the fix where builder cracked concrete to move plumbing. He had put the pipe too close to the perimeter cabinet walls. It was for the sink in the island.