The footing is done. The foundation wall is constructed next. This house will have a concrete foundation wall that is partially below and partially above grade. Concrete on its own does not have tensile strength (but does have high compressive strength) so steel re-bar is used within the concrete to strengthen it. Forms are placed on the footing around the re-bar and then wet concrete is placed in to form the wall. The next day, when the concrete has cured, the forms are removed and you have your finished concrete wall.