For warm, dry foundations, Xi Plus pre-cast concrete panels feature Dow Thermax over rigid foam, plus 4-inch insulated footer beams. The rebar-reinforced panels are available with a built-in insulation R-value of 21.3 and up to R-42. Each panel has four pre-cast access holes for wiring and plumbing; insulated corners, studs, and bond beam; and a galvanized steel-stud facing. Superior Walls | 800.452.9255 |