Retaining walls Retaining walls are structures designed to restain soil to a slope that it would not naturally keep up to. Armour stone not only protects against the elements, it looks amazing. We can construct beautiful armour stone retaining walls at competitive prices. If you need a retaining wall in your space lets make it immaculate. Armour stone is the perfect replacement of that old boring cement wall. This project really showcases the caliber of craftsmanship put into this armour stone retaining wall.