Hello,Tom! It can also be due to settling, and newness of the home. I also know that Eric has some very good points as well. It would help to know when the house was built, Whether the area where the crack is, is an addition, and general knowledge will help. I understand that the area where the crack was found was carpeted, so if there had been a crack there, that You could not have known. Now, I also agree that something was very wrong, to allow that much water in. I would check out the sump pump, and see if it is running, if it is picking up water, and moving it out side as it should. You also could have roots in the drain tile. and that is usually a big job. I would do a complete study on what went wrong.If You are in the country, You should be able to find where Your water is pumped. I have been there, and done that. I was younger, so I could dig around the foundation, and replace the bad pipe. My house was built in the 40's, and We put a addition on the house around 10 years ago. I was told By the inspector, that the preparation prior to the pour, was sa good as it gets. And I have a crack in the center of the floor, You may not have to do any thing to the crack except to force a bit of sealer in there. unless You know its running in there. So there are some things to check, before You do just a repair on the crack, and not check out the other things. I talk too much, Ha, but I hope it' helps .
John 3:16 Please fill out your profile, It helps us to know you better