What is a perimeter slab foundation?
A perimeter slab foundation often referred as a stem wall slab is an excellent slab on grade foundation when you have unevenness or a less than level lot.
There are three components of a perimeter slab foundation:
1) A standard footing 16 inches wide by 8 inches high for example.
2) A wall usually out of a concrete masonry unit,(CMU), anywhere from one to three block courses.
3) The stem wall forms a containment perimeter where it is back filled with sand or gravel then the slab is poured within the foundation wall.
See Typical Wall Section Below: