What would I need a Retaining Wall for? Do you have a yard that slopes off and might not be usable? Or, possibly your yard is eroding because of poor drainage? Or, do you want to build a pool and need a wall to hold up one side of the pool because of your sloping yard? There are many reasons, big to small, of why you might need a retaining wall. It might be something as simple as wanting a small accent wall to help decorate and landscape your front yard. Romanstone Hardscapes has a large variety of wall blocks, from small to large, for anything from accent to large functional walls.