The first kind of foundation construction technique involves utilizing existing soil, rubble, or other filler material under the predetermined foundation location. This material is packed and compressed as much as possible, usually with earth-moving equipment, and then a slab foundation is poured over the surface. Foundation construction services typically use this method for residential, commercial slab foundation constructions, though the usefulness is limited based on all the factors discussed in the previous section, and only specific geographies and building types suited to this basic foundation construction technique.