Is this a serious problem

[fedexforum]

Please see attached picture, it is a new poured slab, is this hole/crack going to be a major problem?

[concretemasonry]

You lost some strength. Probably major depending on where it goes.

Who put the cover-up patch on? - Am I reading the picture right?

[fedexforum]

Here are two more pictures, it is at the back of the house. The hole is more than 2 inches deep.

[Vector]

That's some sloppy work. And right under the cripple & king of the header too. That point will be taking 2-3x the load of a typical area of the foundation. I'd be pissed.

[Dahammer]

Ouch! I agree with Vector. At the very least you should insist that the header be redone. You can make it longer so that the weight will be transfered to a soild spot in the foundation. They can then reframe your opening under it.

[fedexforum]

Builder's solution is to fill the area with concrete and add an extra floor plate, don't know if this will solve the problem.