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The depth of your decomposed granite depends on its intended use, but around 3 to 4 inches is the most common depth. Driveways that need to support a lot of weight should be at a depth of no less than 6 inches. Walkways that won’t see a lot of weight but lots of foot traffic should be built at a depth of 3 to 4 inches, and patios should also be between 3 and 4 inches deep.

To take advantage of any deals on ordering gravel in bulk, it can also be beneficial in the long run to work on other gravel projects you plan to complete someday. These may include filling in a gravel driveway, building a patio, constructing a fire pit area , planning a garden walkway, or using stone instead of mulch in your flower beds.

Pea gravel is the most common type of gravel, and it can be made of limestone, granite, basalt, sandstone, and many other types of rock. The strength in gravel comes from the distribution across the stones, so while one rock type may not be particularly strong (like sandstone), the matrix of small rocks that is gravel can become incredibly strong when installed correctly. 

Many ways to landscape a steep slope on a budget exist. Avoiding expensive retaining wall construction is the first step. Consider creating a rocky slope with boulders or large stones, or think about planting perennials that return every year with a single investment. Transplanting small trees from elsewhere on your property is also possible and can help to stabilize steep slopes without purchasing new ones.