One of the main reasons for a paver patio sinking in a short amount of time is due to poorly tamped soil. If the soil beneath the pavers is not compacted enough, it can easily shift and settle, causing the pavers to sink and become uneven. This can be exacerbated by heavy foot traffic or rainfall, leading to further sinking and potential damage. To avoid this problem, it's essential to ensure that the soil is well-tamped before laying the pavers, and any excess water is drained away from the patio area to prevent soil erosion. Regular maintenance and repair can also help prevent further sinking and keep the patio looking its best.

Natural stones will always look good over time, manufacture stones will change colors and lose their texture.

This could be most likely because it does not have a good foundation. The best way to solve it is to rebuild a new foundation.

Concrete takes about 24 hours to cure to be safe to walk. Note: during the winter season, it can take longer than 24 hours to cure not recommended to do concrete in the winter season.

The best way is to lay 4 in concrete and then place pavers on top.

This can be because moisture infiltrates behind stone and then freezes.

It is recommended every 25 to 35 years its necessary to prevent major problems.

When water coming in through vertical cracks and when cracks starts getting wider.