Topsoil is defined by the top two to seven inches of soil that has the greatest organic matter content and microorganisms. Organic matter is what is left after plant roots, stems and leaves decompose. When building a new home, people search for topsoil to ensure a healthy lawn. Gardeners tend to till in topsoil into their gardens to increase nutrient cycling, organic matter and water holding capacity.
Cushion Sand can either be screened or unscreened. Despite the name, Cushion Sand often contains at least some small rock and sometimes even bigger than that, and has at least some clay content. Cushion Sand is primarily used on construction sites for pipe embedment, on building pads around pipe, and under concrete work.
Select Fill is a special material used most often with building pads. Occasionally, it will be used for trench backfill. Select Fill is usually a mix of clay and sand that is dug and tossed to get a consistent mix, so that when worked and compacted, the material will pass required testing for engineer specifications on building pads. Select Fill is generally used on constructions sites with equipment, but if you have a hole to fill in your yard and don’t mind the work, this is a cheaper alternative to Topsoil.