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If you’re using crushed stone or gravel as a base material, then yes, you should compact it to prevent movement of the top layers. For instance, if you don’t compact crushed stone or gravel and you lay pavers on top of them, the pavers will shift over time. However, if you’re using gravel or crushed stone as a top layer for aesthetic purposes, you might not want to compact the materials.

No, gravel and crushed rock are different. Crushed rock is made in a quarry and has sharp, jagged edges. It’s most commonly used for building and construction.

Gravel naturally occurs in river beds or lakes and features smooth edges, making it a better choice for landscaping or other decorative areas. Like crushed stone, gravel can also be found in quarries, but it’s typically due to rock-on-rock erosion rather than machinery.

Most experts recommend a quarter-inch layer of compost for best results, and you will need about .77 cubic yards of material per 1,000 square feet. To measure how much compost to use, take the square footage of your yard and multiply it by .77, then divide that number by 1,000.

The number of bags of topsoil you need depends on the depth you’re filling. The average topsoil is sold in a roughly forty-pound bag, covering 12 square feet at a one-inch depth. Since topsoil is by nature the uppermost layer of soil, you can bet on only needing to fill about 4 to 8 inches of soil depth with it.