Slab on Grade
Raft slabs - How to build Insulated frost protected shallow foundations (FPSF) on problem soils
...slab-on-grade foundation with a thickened-edge footing without first beginning with extensive and costly soil remediation. Opting for a raft slab in such conditions can be a much cheaper option.
A raft slab is a type of frost-protected shallow foundation, or slab-on-grade foundation, that does not include the standard...