Using sand as a filler between the cracks of an outside patio on a yearly basis is not necessarily normal or ideal. The frequency of maintenance required for patio joints depends on various factors such as the type of pavers or stones used, the climate in your area, the level of foot traffic, and the quality of the initial installation.
Sand is commonly used as a filler material for patio joints because it allows for some flexibility, drainage, and prevents weed growth. However, sand can be prone to erosion and displacement over time, especially in areas with heavy rain, strong winds, or high foot traffic. If you find yourself needing to refill the cracks with sand every year, it could be an indication of some underlying issues:
Inadequate Base: If the base or foundation beneath the patio pavers is not properly compacted or lacks adequate drainage, it can lead to shifting and settling of the pavers, causing the sand to dislodge.
Poor Joint Sand Quality: The type and quality of the sand used can make a difference. Coarser sand with angular particles tends to lock together better than fine, smooth sand, which is more susceptible to erosion.
Climate and Weather: Harsh weather conditions, such as freezing and thawing cycles, can cause the patio pavers to shift and the sand to wash away.
Insufficient Edge Restraints: Without proper edging to keep the pavers in place, they may move, leading to gaps and displacement of the joint sand.
To address these issues and reduce the need for annual sand refilling, consider the following steps:
- Ensure a proper base and adequate drainage during the initial patio installation.
- Use high-quality joint sand that is suitable for your climate and type of pavers.
- Consider using polymeric sand, a binding agent that hardens when exposed to moisture, providing better stability.
- Add edge restraints or borders to keep the pavers in place and prevent shifting.
- Consider sealing the pavers periodically to minimize water infiltration and weed growth.
If you are concerned about the ongoing maintenance and sand refilling, it might be worth consulting with a professional patio installer or a landscaping expert to assess the patio's current condition and recommend appropriate solutions for a longer-lasting and low-maintenance patio.