Substructure and ground-bearing floors

5.1.6Ground below fill

Ground below fill shall be adequately prepared to provide consistent support to the fill and the ground-bearing slab without undue movement.

Ground-bearing floor slabs may only be built on ground where:

  • the ground is suitable to support floor loads and any other loads
  • all topsoil containing vegetation and organic matter, including tree roots, has been removed
  • there is a suitable and even bearing surface.