Radiant Heat Slab Insulation

Concrete slabs that will be used for radiant heating must be insulated adequately. Proper insulation minimizes downward heat loss and maximizes the amount of heat that will do its intended job: heating the floor. The Radiant Professionals Alliance recommends insulation with an R-value equal to at least 0.125-times the difference between the desired indoor temperature and the outdoor design temperature. A building in New York City (15°F design temperature), for example, with a 70°F desired indoor temperature would require a minimum R-value of 6.875 for its under-slab insulation (0.125 x [70°F - 15°F]). Visit SupplyHouse.com to purchase radiant heat insulation and other radiant heat products.