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The maximum lippage or height difference between interlocking pavers is 1/8 inch or 3 millimeters. Any higher than that could become a hazard or impact the area’s ability to drain water properly. Some building codes or types of interlocking pavers could require even less of a height difference, so check with your local regulations and the manufacturer to clarify.

The lifespan of pavers varies based on many factors. Material is the key component, with concrete, stone, and brick pavers lasting up to 100 years, while clay pavers usually only last around 25 years. To maximize your pavers’ lifespan, you should keep your paver patio or walkway clean, add sealant every few years, and keep the joints sealed with polymeric sand as needed.

After removing existing moss, consider using paver blocking sand to fill the joints. This specialty material hardens once placed and serves as an effective barrier against moss and weeds. From there on, regularly clean your pavers and try to keep them dry. You can also seal your paver as a semi-permanent solution — just make sure you reseal every 3 to 5 years.

Cobblestone driveways can take a major hit on anyone's bank account, begging the question of whether it's worth it to build a cobblestone driveway. Some homeowners might prefer more affordable driveway materials like concrete or pavers, which can give a similar appearance to cobblestone without the high price tag.

Paving your driveway costs between $2,500 and $6,600, to put that in perspective. But for others, there’s nothing quite like the timeless look of cobblestone driveways.