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The most common causes of sunken pavers are poor base preparation and insufficient compaction. The problem could also be how your pavers were installed. If the soil beneath your patio or walkway wasn't compacted, it will pull pavers down as it settles. Additionally, using bare soil instead of making a paver bed with compacted gravel and sand can cause sinking over time. To fix sunken pavers, consider recompacting the base and addressing any drainage or erosion issues in the area.

DIY is possible for small areas. Professional installation ensures proper leveling, alignment, and durability for larger projects.

You’ll first need to install a base underneath your pavers for extra stability and drainage. Otherwise, the pavers can sink into the ground, and you’ll have to reinstall them. Use a base gravel layer of 4 to 6 inches for walkways and 10 to 12 inches for driveways. Compact your gravel layer every 2 to 4 inches so it’s nice and solid. After you install your gravel base, apply a 1-inch layer of sand on top.

If you care for and maintain your cobblestone driveway, it may last for several centuries. So, while cobblestone driveways have a high upfront price tag, you’re unlikely to need to replace it throughout your lifetime. This gives cobblestone driveways a major advantage over other driveways, which tend to have much shorter life spans. 

For example, asphalt driveways last between 15 and 30 years, while concrete driveways last around 50 years.