Substantial Rib Retainers hold up during backfill
SuperVoid Rib Retainers are sturdy purpose built soil retainer panels which reliabliy maintain void envelopes during and after backfill. Like all other SuperVoid products, Rib Retainers were invented to fill a need that the construction industry had otherwise failed to fill. Rib Retainers are designed to be much stronger than other plastic soil retainer panels and unlike other plastic panels, Rib Retainers actually work as they are intended to. Rib Retainers much lighter weight than concrete soil retainer panels, yet just as strong, if not stronger. Rib Retainers are molded from 95% recycled HDPE plastic and like all other SuperVoid products, we don't scrimp on quality for the sake of economy. Our customers agree that this is the best soil retainer panel available anywhere.