Build a strong, clean-looking retaining wall fast with Semma Walls, a double-sided split-face concrete system that locks together for vertical or sloped builds. Tackle raised patios, freestanding seating walls, and garden borders with blocks engineered to stay aligned and look finished on both sides. Speed up DIY installs with tapered sides for smooth curves and a mechanical interlock that removes guesswork.

Key Features

• Double-sided split face: Finish both sides for seating walls and parapets.
• Independent interlock: Keep courses tight for vertical or battered designs.
• Tapered sides: Form curves and corners with less cutting and waste.
• 4-cored units: Fill with gravel to boost shear strength and stability.
• Dry Cast concrete: Count on high strength and weather resistance season after season.
• Contractor-friendly handling: Move and place cored units more easily on DIY projects.
• Matching corner & pillar kit: Finish columns and crisp 90° corners that line up clean.

Applications

Shape backyard terraces, retain soil for raised patios, and build freestanding parapets that match your hardscape. Create garden enclosures and modern landscape accents that look cohesive from every angle. Plan straight runs or flowing curves without complicated cuts.

Specifications

• Material: Dry Cast concrete
• Unit dimensions: 5 7/8 x 11 x 16 in (150 x 279 x 406 mm)
• Corner & pillar kit: 5 7/8 x 1 1/2 x 16 in (150 x 38 x 406 mm)
• Finish: Split face with rugged surface texture
• Build styles: Vertical or battered; double-sided appearance
• Colors: Shale Grey, Champlain Grey, Chestnut Brown, Sandlewood

Prepare a solid base, compact well, and fill block cores with clean gravel to add strength and promote drainage. Rinse occasionally to keep the surface looking fresh. Backed by a limited lifetime warranty for lasting confidence.