Figure 4-11. Slab-on-Grade with Concrete Masonry Stem Wall and Exterior Insulation
Figure 4-11 illustrates a slab-on-grade foundation with a masonry foundation wall. Rigid insulation is placed vertically on the exterior face of the foundation wall. This insulation aligns with rigid foam sheathing that covers the framed walls above grade. Moisture control is provided by a vapor retarder under the slab. This vapor retarder is is continued up and over the stem wall, and capped by sill sealer between the foundation and the bottom plate of the framed wall.