Decomposed granite is a popular choice for pathways, driveways, and other landscaping projects due to its natural appearance and affordability. However, it is important to consider the potential drawbacks of using decomposed granite without proper stabilization. Here are several reasons why it may not be advisable to use decomposed granite without taking certain precautions:
1. Spreading: One of the main issues with loose decomposed granite is that it tends to spread easily. Over time, foot traffic, rain, and other natural elements can cause the granite particles to scatter and migrate to surrounding areas. This can result in an uneven and messy appearance, making it difficult to maintain the desired pathway or driveway shape.
2. Rutting: Another problem with loose decomposed granite is that it can rut, especially when exposed to heavy traffic or frequent use. Ruts are depressions or grooves that form in the surface, making it uneven and potentially hazardous. This can be particularly problematic for areas with vehicles or high foot traffic, as it can lead to an uncomfortable and unsafe walking or driving experience.
3. Hardening and Impermeability: On the other hand, if decomposed granite is not properly maintained and replenished, it can become compacted and hardened over time. This can result in a surface that is difficult to walk or drive on, as it may feel too firm or even become impermeable. When the granite particles harden, they lose their ability to drain water effectively, leading to potential drainage issues and standing water problems.
4. Weathering: Loose decomposed granite is susceptible to the effects of weathering. Rain, snow, and other forms of precipitation can cause the granite particles to erode or wash away, leading to a thinner layer over time. This can result in an uneven surface and may require frequent replenishment or maintenance. Additionally, exposure to UV rays can cause the granite to fade and lose its natural color, diminishing its aesthetic appeal.
To mitigate these potential issues, it is recommended to stabilize decomposed granite before laying it as a pathway or driveway surface. Stabilization methods include the use of a binding agent, such as decomposed granite stabilizer or polymer additives, which help bind the particles together and provide a more stable surface. Another option is to use pavers or edging to contain the decomposed granite and prevent spreading.
While decomposed granite is a cost-effective and visually appealing option for landscaping projects, it is important to consider the potential drawbacks of using it without proper stabilization. Spreading, rutting, hardening, and weathering are all issues that can arise when loose decomposed granite is not properly managed. By understanding these potential problems and taking appropriate steps to stabilize the material, you can ensure a long-lasting and functional pathway or driveway.
