EPS (expanded polystyrene) 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.
3200 9th Ave. SE Watertown, South Dakota 57201 Ph. 605/886-8084 Tf. 800/658-3444 Fx. 605/886-8099