The Ui Wall is a non-insulated 4-foot high precast concrete foundation especially designed for use during home construction below garages and porches. When used in conjunction with the Superior Walls Xi or R5 panels, a home’s entire foundation can be installed in less than a day. The wall, which is L-shaped for added stability, is 10¼ inches wide at the bottom and 4 inches wide at the top. The solid concrete wall is ideal for shorter foundation areas of the home that will not be used or accessed, such as under a garage or porch.