Semma Wall is a double-sided retaining wall block system with tapered sides and an independent mechanical interlock for vertical or battered walls. Designed with exceptional shear strength and contractor-friendly cored units, it provides lasting solutions for raised patios, structural retaining walls, and free-standing parapets. Semma Wall is engineered for structural performance while delivering the refined appearance of modern retaining wall blocks. Its independent mechanical interlock and tapered design allow the construction of both vertical and battered walls, while the integrated Coin feature supports raised patios with free-standing parapets. The 4-core system, when gravel-filled, adds interlock, strength, and joint stability, making Semma an advanced retaining wall block system for demanding projects. Available in a rugged split finish and four versatile colors, Semma combines durability, flexibility, and style. Supported by matching pillar kits and backed by a limited lifetime warranty, it ensures lasting strength and design freedom in any landscape.