Greenlock

Our range of Greenlock blocks is cost-efficient and environmentally friendly concrete soil retaining wall blocks.
All dry stacked retaining walls are gravity walls and wall stability and strength rely mainly on weight, friction, anchorage, drainage, and the angle of the structure. Retaining walls are also referred to as “Living Walls”. The Pyramids, the great wall of China, the Inca Temples, and many more ancient structures around the world are evidence and examples of such building technics. A dry-stack interlocking concrete retaining block system is in our opinion by far the best way to provide a strong, cost-effective and at the same time flexible and durable wall which, if installed correctly, will last nearly forever. The GreenLock retaining wall blocks have been designed and engineered on that basis. The positive concave and convex interlock, as well as the weight per block to size ratio, allow the GreenLock retaining wall blocks to be installed with ease. Curves, circles, sharp corners, angles – both convex and concave- as well as integrating steps into the wall by using the same GreenLock blocks, are simple and exact to construct. Some of our retaining wall blocks have degree markers cast on the top surface to assure to be able to lay a perfect curve, circle, angle, and sharp corners. Our blocks are the first and only blocks on the market to have such a feature. Although retaining walls look simple to install, there are many factors and criteria’s to consider to assure that the wall will be constructed correctly to prevent a possible wall failure. We at City Sand think it best to always use the advice and/or services of a qualified engineer to make sure your wall will not fail and last forever.