What is geogrid and when should it be used?
As a rule of thumb, all walls over 3 high should be reinforced with geogrid. Geogrid is placed between the layers of block at different intervals to stabilize the soil behind the retaining wall and secure the wall face to the earth behind it. The height of the finished wall, soil characteristics, and the pressure on the wall caused by slopes, structures, and/or paved areas all affect the proper placement and lengths of geogrid.
