A drainage pipe outlet at the bottom of the wall may be required for taller walls. It is important to backfill each course as it is installed and compact each layer. Fill in directly behind the wall for approximately 12 inches. Use of organic topsoil or clay type soil is not recommended for backfill. Install the Backfillīackfill with a clean, free-draining course aggregate such as #8 crushed stone or L-Gravel at least 12″ behind the J-Block wall. It is very important that the first course is installed level. Use a string line to insure a straight line. Level the J-Block from side to side and from front to back with a carpenters level. Place the first course of J-Block on the leveling pad with the built in set-back lip facing down. The first course of block should be started 1″ below grade per 1′ of designed wall height (a 2′ tall wall would require the first course of block to be 2″ below grade). A 1″ layer of sand can also be added to the top of the #53’s base to help with leveling of the first course. The foundation leveling pad should be at least 16″ wide and 6″ deep and composed of a compactable stone material like #53’s. Prepare the Foundation / Leveling PadĪ solid foundation is essential to ensure a well constructed, long lasting wall. If you have any questions ask your local dealer or a qualified engineer. Be sure to consider the draining patterns, soil conditions, surcharges and the local building codes. It is not recommended to go higher than 5 courses of J-Block (27 1/2″) and a proper foundation and drainage becomes more critical the higher you go. J-Block Installation Instructions Plan Your Projectīefore beginning construction, prepare a layout plan of the wall. That means you can create retaining walls, tree rings, planters, terrace gardens, steps and much more. With a little imagination and a few hand tools it is easy to build straight walls, inside curves, outside curves, and anything from 1 to 5 courses in height. With the built in set-back lip on each unit, proper alignment and set-back are automatic. ![]() J-Block are light enough to be installed by just about anyone. Each unit weighs only 30 pounds allowing for fast and easy installation. It requires no mortar, footings, or interlocking pins. J-Block is one of the easiest do-it-yourself retaining wall systems available.
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