Precast Concrete Wall Systems bodySuperior Walls of America has launched the new Xi Plus™ product line of insulated precast concrete wall systems. Custom-made for the exact needs of each project, the panels feature superior strength and insulation for the creation of dry, warm and energy-efficient foundations. The enhanced Xi Plus walls feature the additions of Dow® THERMAX™ reinforced polyisocyanurate insulation covering rigid foam insulation and a four-inch insulated footer beam. The panels are now available with a built-in insulation value of R-21.3 and can be insulated up to R-42+. For more information, visit