Retaining Walls and Stairs The grand staircase is as impressive as the wall itself. Using structural walls, challenging projects can be completed. These Random steps work with the natural slope. Lights add safety and character. With a multitude of available colours, matching to the house veneer is possible. Sloping the top surface of the wall creates a more natural appearance. Rather than one large wall, consider using smaller walls and a gentle slope. Using segmental units, stairways can be customized to meet your needs. Adjacent to driveways, make sure grid is used irrespective of height. Smaller sized units are well suited to meeting unique demands.