Above is a short animation of how a GeoStone seawall works. Notice that the water is allowed to flow into the backfill. This is good because it means that the water cannot be trapped behind the wall. Let's face it, water will get behind the wall and water will eventually find its way out. Whether it be a segmental wall like GeoStone or a concrete wall, wood wall, or a concrete block wall with mortar, the installer must provide a way for the water to escape from behind the wall. Some alleviations to this problem involve weep holes. These evetually become clogged, so the water will find another exit. Usually that other exit is beneath the footing which can undermine the integrity of the wall. Because GeoStone is segmental, the water is allowed to escape in the areas where the blocks join, so essentially, every single block in the wall is surrounded by weep holes. This gives GeoStone the best drainage capabilities of any other type of seawall on the market.