Green Insulation Products brings to you, Barrier XT under concrete insulation as a foam board replacement. BarrierXT is and underground insulator/water/vapor barrier that is made with 3/4" 100% recycled EPS and 3 mil heavy duty polyethylene film laminated to both sides. Barrier Xt protects against from heat loss and moisture, is a thermal block, will not collapse under the weight of concrete. Comes in flexible 4'x 60' rolls with patented edge -taping system for watertight easy installation. see at www.GreenInsulationProducts.com