We are having a garage added to our home, and this required a new foundation to be attached to our existing foundation. There were 2 windows in the basement that needed to be filled. The foundation company drilled four large holes (looks like at least 3/4 diameter) and used some strange looking bolts to attach the forms over the windows. I estimate the holes are about 4-5" deep, in an 8" foundation.
Some of these holes will not be covered by the slab, they will be underneath, in the 3/4 gravel. I am worried that these holes will fill with water and create a slow leak or, worse, cause cracking if water gets in and freezes.
I've looked around for a suitable product to fill the holes with myself, as I am almost certain the foundation company is not going to take care of it, and this Monday is the absolute last day I can have them messing about with the foundation.
Should I be worried about filling these holes?
If yes, is QUIKRETE® Hydraulic Water-Stop Cement a good choice?