Mirafi Grid is an open mesh grid structure that is placed in horizontal layers to reinforce retaining walls that are 5ft or higher. The geogrid acts as a “tie-back†to resist the outward movement of the retained soil. The geogrid holds the soil in place to allow the retaining wall to function, when building taller walls, the retained soil begins to exert enough outward force in the wall to push over the concrete blocks causing wall failure. A properly designed wall with Mirafi grid as the reinforcement, will reduce this outward pressure allowing the wall to function as desired.