Geofoam – Structural EPS Insulation

The Leader in Engineered Light Weight Fill Material

InsulFoam® GF (EPS Geofoam) is a lightweight, geo-synthetic foam fill material used  as an alternative to various fill-materials, as a soil stabilizer or as void fill, and in various engineered applications.

Geofoam consists of closed-cell expanded polystyrene (EPS) and meets or exceeds the requirements of ASTM D6817 Standard Specification for Rigid Cellular Polystyrene Geofoam.  Thanks to a weight that is lighter than that of most fill materials, InsulFoam® GF is cost-effective and does not typically require surcharging, preloading, and staging often necessary in construction applications. InsulFoam® GF is environmentally friendly and 100% recyclable, containing no HCFCs or formaldehyde.

With superior stability, and long-term R-value, InsulFoam® GF resists insects, mold, decomposition and severe weather conditions, including freeze-thaw cycles and moisture.

Request Quote ButtonGeofoam applications include:

  • Highways and Roads
  • Railways
  • Airport Runways
  • Ramps
  • Bridge Approaches
  • Retaining Walls
  • Retaining Walls
  • Berms and Embankments
  • Parking Structures
  • Foundations
  • Loading Docks and Ramps
  • Landscaping
  • Lightweight Void Fill
  • Levees and Dikes
  • Buried Utility Protection
  • Theater and Stadium Seating
  • Pools and Pool Decks
  • Landscaping
  • Retaining Walls
  • Lightweight Void Fill


Geofoam Advantages over other Fill Materials


  • Lightweight – Minimize preloading, surcharging and staged construction
  • Weather Resistant – Withstands freeze-thaw cycles, moisture and road salts,
  • Doesn’t Settle – Less structural inconsistencies
  • Insect and Mold Resistant – Will not sustain mold or mildew growth, termite / ant repellant additive available
  • Manufactured to Meet Your Job Specifications – Multiple densities, various block sizes available
  • Ease of Installation – Lightweight, no heavy equipment needed, cuts easily with a hot wire or saw
  • Environmentally Friendly – 100% Recyclable, No HCFCs or Formaldehyde




Geofoam Design Considerations

  • For InsulFoam Geofoam applications, design should not exceed 1% strain for combined live loads
  • In conditions where InsulFoam GF is periodically subjected to submergence from fluctuating ground water, add 1.87 lb/ft3 (30 kg/m3) to the InsulFoam GF design density.
  • In conditions where InsulFoam GF is continually below ground water, add 5.00 lb/ft3 (80 kg/m3) to the InsulFoam GF design density.
  • In earth work applications such as le- vees, dikes, and berms, uplift buoyancy forces must be considered. The buoy- ancy force must be counteracted with overburden or restraint devices with geogrids or geomembranes.



Educational Geofoam Links

ASCE: American Society of Civil Engineers The Geo-Institute (G-I) is a specialty organization focused on the geo industry
Geofoam Research Center: in Syracuse NY
AASHTO: Non Profit representing Highway and Transportation Departments in 50 states plus PR and DOC
ARTBA: American Road and Transportation Builders
FTBA: Florida Transportation Builders



Want to know more?

You can always contact us or find a Representative near you. We are here to help make your insulation selection process easier!