difference between stem wall and slab
Slab Foundations. The two basic types of slab foundations are the monolith and the stem wall. Monolithic foundations are poured as a single form, with the outside edge, about the width of the wall, being 10 to 12 inches deep and the center of the slab typically 4 to 6 inches deep. A stem wall foundation is poured in multiple parts.
Stem-walls are foundation systems constructed in three components; a spread footing to transfer load to the underlying soil, a (typically) masonry foundation wall, and a poured slab. Advantages of stem-wall foundation systems include: 1  less fill required for sloped lots (the foundation wall can built at different heights to accommodate a sloped lot) 2  a greater free-board distance from the top of slab to the surrounding grade of the lot can be accomplished giving the home a more pronounced appearance.