Can I Put New Polymeric Sand Over Old? A Comprehensive Guide
When it comes to resurfacing your concrete patio or walkway, using polymeric sand is a popular choice for its durability and ease of maintenance. However, you may wonder if it’s possible to put new polymeric sand over old. In this article, we will discuss the feasibility of this idea and provide you with a comprehensive guide to ensure the best results.
Understanding Polymeric Sand
Polymeric sand is a type of sand that contains a polymer additive, which allows it to set and harden when exposed to moisture. This feature makes it an excellent choice for filling joints in concrete, as it creates a stable, water-resistant barrier that prevents weeds and insects from entering the joints. Additionally, polymeric sand is highly durable and can withstand harsh weather conditions.
Is It Possible to Put New Polymeric Sand Over Old?
The short answer is yes, you can put new polymeric sand over old. However, there are several factors to consider before proceeding with this method.
Preparation
Before applying new polymeric sand, it’s essential to prepare the existing surface. Here are some steps to follow:
1. Clean the surface: Remove any debris, weeds, or loose particles from the joints.
2. Inspect the joints: Check for any cracks or damage in the concrete. If necessary, repair the cracks before proceeding.
3. Remove old sand: If the old polymeric sand is still in good condition, you can sweep it out of the joints. If the sand is degraded or has become a mess, you may need to use a pressure washer or a sandblasting tool to remove it.
Applying New Polymeric Sand
Once the surface is prepared, you can apply the new polymeric sand. Here are some tips to ensure a successful application:
1. Use the right product: Make sure you purchase a high-quality polymeric sand that is suitable for your project.
2. Mix the sand: Follow the manufacturer’s instructions for mixing the sand with water. The mixture should be thick and paste-like.
3. Apply the sand: Use a trowel or a brush to apply the sand mixture into the joints. Be sure to fill the joints completely and smooth the surface.
4. Allow curing: Give the polymeric sand enough time to cure according to the manufacturer’s recommendations. This process typically takes a few hours, but it may vary depending on the temperature and humidity.
Conclusion
In conclusion, it is possible to put new polymeric sand over old, but proper preparation and application are crucial for the best results. By following the steps outlined in this article, you can ensure a durable, water-resistant joint that will enhance the appearance and longevity of your concrete surface.
