Can You Add Polymeric Sand Over Polymeric Sand?
When it comes to laying a patio or a walkway, polymeric sand is a popular choice due to its durability and ease of maintenance. However, you might be wondering if it’s possible to add polymeric sand over existing polymeric sand. Let’s delve into this question and explore the various aspects involved.
Understanding Polymeric Sand
Polymeric sand is a specialized type of sand that is used to fill the gaps between pavers. It is made from a blend of sand and a polymer that hardens when it comes into contact with water. This hardening process creates a stable, weed-free, and dust-free joint that can withstand heavy foot traffic and harsh weather conditions.
Is It Possible to Add Polymeric Sand Over Existing Polymeric Sand?
Yes, it is possible to add polymeric sand over existing polymeric sand. However, there are a few factors to consider before proceeding with this task.
1. Condition of the Existing Sand
Before adding new polymeric sand, it’s essential to inspect the condition of the existing sand. If the existing sand is in good condition, with no signs of erosion or weed growth, you can proceed with adding new sand. However, if the existing sand is compacted, eroded, or has weeds growing through it, you may need to remove some of the existing sand and replace it entirely.
2. Cleaning the Area
No matter the condition of the existing sand, it’s crucial to clean the area thoroughly before adding new polymeric sand. This involves removing any debris, leaves, or weeds, and sweeping the surface to ensure a clean and even base for the new sand.
3. Adding New Sand
Once the area is clean, you can start adding the new polymeric sand. It’s important to use a fine-toothed rake to spread the sand evenly across the surface. Be sure to fill the gaps between the pavers, but avoid overfilling, as this can cause the pavers to shift or become uneven.
4. Watering the Sand
After spreading the new sand, you need to water it thoroughly. This will activate the polymer, causing it to harden and bind the sand particles together. Be sure to water the entire area, including the edges and corners, to ensure even curing.
5. Curing Time
The curing time for polymeric sand can vary depending on the weather conditions and the amount of sand used. Generally, it takes 24 to 48 hours for the sand to cure completely. During this time, it’s important to avoid walking on the area or placing heavy objects on it, as this can disrupt the curing process.
6. Maintenance
Once the polymeric sand has cured, it’s essential to maintain it properly. This involves regular sweeping to remove debris and weeds, and occasional reapplication of sand if the joints become excessively wide or if weeds start to grow through.
Table: Comparison of Polymeric Sand and Traditional Sand
| Feature | Polymeric Sand | Traditional Sand |
|---|---|---|
| Hardening Process | Hardens when water is added | Remains loose and shifting |
| Weed Growth | Prevents weed growth | Can promote weed growth |
| Maintenance | Easy to maintain | More maintenance required |
| Cost | Higher cost | Lower cost |
In conclusion, adding polymeric sand over existing polymeric sand is possible, but it requires careful preparation and attention to detail. By following these steps and maintaining the area properly, you can ensure a long-lasting and beautiful patio or walkway.
