Structural Fill

Fill is natural subsoil that has no organic matter to support plant growth. It is primarily for deep fills of 16 inches or more. Structural fill creates a strong and stable base and is often used when the native soil at a site may be too weak to support a structure. The soil is replaced by compacted structural fill to provide the needed structural support.  It typically contains small rocks, sand  and clay. If plant growth of any type is needed topsoil will need to be applied on top.