2008 Benchmark geofoam job, West Fargo ND

2008 Benchmark Geofoam Job, West Fargo ND

Geofoam is closed-cell expanded polystyrene (EPS) manufactured by Benchmark Foam, Inc.  In relation to the geotechnical engineering field, it is considered a super-lightweight fill material because it is 50-100 times lighter than other so-called lightweight fill materials. Geofoam is generally defined as EPS billets used in geotechnical applications such as residential, commercial or civil in order to reduce settlements and/or improve substructure support conditions.


Geofoam Solutions for Geotechnical Applications

Geofoam is used as a lightweight fill in areas where the subgrade is too unstable and cannot carry predictable loads by means of other common fill or lightweight products.

Because of the extreme lightweight physical properties of Geofoam, it can significantly reduce stress and settlements on large earth structures.

  • Reducing settlements
  • Minimizing lateral pressures on retaining walls
  • Slope stability
  • Embankments on unstable soils
  • Highway insulation
  • Bridge abutments
  • Frost protection
  • Lightweight void fill
  • Tunnel projects and various underpasses




Benchmark foam, Inc. provides Geofoam in a block form with dimensions of 36.75” x 48.5 x 97” or 194”. Custom block fabrication is available in order to meet most jobsite requirements. Geofoam is also available in a range of standard specifications depending on your projects needs and is manufactured to ASTM D6817-15 guidelines.


Environmental Issues

Geofoam contains no CFC’s, HCFC’s or other gases that are harmful to the ozone. Geofoam is inert, non-nutritive, and very stable. It will not decompose, decay, or produce undesirable gases or leachates. Geofoam is recyclable.


Click on the links below to view, download, or print our literature 

 Geofoam Brochure

2008 Benchmark Foam Geofoam Job, West Fargo, North Dakota 


 Click the above image to visit the Geofoam Research Center’s website.

Benchmark Foam, Inc., 401 Pheasant Ridge Drive, Watertown, South Dakota 57201
Phone 605-886-8084   Toll-free 800-658-3444   Fax 605-886-8099

Products Made In The USA!

EPS is a lightweight, versatile, economical, recyclable material that can be tailored to meet changing and complex requirements. Select one of the following topics to learn more: