A common question from clients is, “how much gravel will be used behind a retaining wall?”

At Gradex Company we will use as much as it takes to get the job done right. While it is rare that a wall may need more gravel we will add it when necessary.

When installing a rock retaining wall it is very important that the water has a primary way to drain away from the wall. Most dry stack rock retaining walls are naturally draining meaning the water will seep through the face in high rain events. The primary way utilizes a gravel pocket with a slotted pipe or drain tile to give the water a way to quickly escape from behind the wall. Gradex walls utilize a wrapped gravel pocket where we wrap the gravel from the back and the top with a heavy 6mm commercial grade weed barrier. This will help prevent soil intrusion into the drainage system which can cause drainage failure.

In installations that are utilizing a Gradex Patented Milled Limestone ledge product, the drainage system is even more key as it will be harder to drain naturally through the wall. This is because the seams are so tight that water has a harder time flowing through the wall. Drainage also requires an exit point for the water to escape. A quality pipe such as a socked drain tile or an HDPE dual walled pipe gives that water an avenue to flow unobstructed.

When you receive a retaining wall quote from Gradex Company, we ensure it has proper drainage figured into the quote. Our projects are done correctly with every element thought out. Contact us to get started on your new project. 

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