Re-do! That's the story of the past 2 weeks. Our foundation contractor let us know that the math wasn't working as he set his wall forms. He was right. With the help of the surveyors, we discovered that the excavation for one-third of the walls was too shallow. The excavation company quickly returned, removed the footers already poured, and dug the footer trench deeper. The footers were reformed and re-poured by that Friday.