About Geofoam for Structural & Earthworks Applications The use of EPS Geofoam in earthworks and structural applications provides the benefit of reducing both vertical and lateral pressures on below-grade structures. Soil creates nearly 40 pcf of lateral pressure. If a structure is below ground level, this lateral pressure increases by a factor of 10. The use of EPS Geofoam completely eliminates this lateral pressure. The use of EPS Geofoam for earthworks and structural applications is easy to install, does not require surcharging, pre-loading or staging and is a cost-effective engineering solution.