When building slab foundations, the concrete pour comes after the footings have set and before walls are erected. Dirt is compacted and backfilled with 4 to 6 inches of gravel.

Building Block Foundation Walls Stem Wall Installation. Posted: May 7, 2025 | Last updated: July 10, 2025. Block walls going up ⬆ ! Lots of progress over the span of just a few hours!