Expanded polystyrene (EPS) provides excellent R-value to eliminate the effects of a heat sink. A heat sink is the heat absorbed into the soil under a heated flooring system. In some applications, a heat sink is desirable, but in most residential applications this may cause problems.
After a floor heating system is turned off, the heat escapes from the soil underneath, causing the temperature in the room to continually increase, making the room uncomfortable. EPS reduces this effect and gives more immediate control of the room temperature. When installing a heated floor system, remember to allow sufficient EPS insulation under the slab.
High-strength Benchmark Foam High-Density EPS is ideal for heated flooring system applications. Or choose Thermo-Snap™ (patented), our 4′ X 4′ in-floor insulation panels into which radiant tubes are easily snapped into place. Because tubes remain in place, float or displacement does not occur. This system eliminates the need for continuous staples, reduces labor and saves on concrete costs.