What is Geogrid? Geogrid is a polyester or polypropylene material that is used to stabilize the soil behind the wall. Recommended for use on walls over 4 feet high, and those walls on a slope. By JT's|2018-11-10T22:03:01+00:00November 10th, 2018|Retainig Wall| Share This Story, Choose Your Platform! FacebookTwitterLinkedInWhatsappPinterestEmail