Long-term performance is vital when selecting rigid insulation under concrete slab. Once installed, particularly in low temperature areas or damp situations, flooring insulation must maintain its R-values over time and resist severe water penetration. Expanded polystyrene (EPS) Insulation is recommended for such use giving superior performance in both static and dynamic loading applications. It is also the Universal Foam Products recommendation for freezer and cooler construction because of its insulating properties and long-term resistance to moisture.
