Decomposed granite, also known as DG, is a popular landscaping material due to its natural look and permeable qualities. However, despite its many benefits, there are certain disadvantages that homeowners and landscapers should be aware of before choosing to use it in their projects.
1. Not Suitable for Stormy Areas
One of the main drawbacks of decomposed granite is that it may not be ideal for locations prone to heavy rainfall or storms. The material is lightweight and can easily wash away with torrential rain, leading to erosion and the need for frequent maintenance.
2. Vulnerable on Major Slopes
Another disadvantage of using decomposed granite is its susceptibility to erosion on major slopes. Due to its loose nature, DG can gradually move downhill over time, especially in areas with a steep gradient, requiring additional stabilization measures to prevent displacement.
3. Limited Load-Bearing Capacity
Decomposed granite is not as resilient as traditional hardscaping materials like concrete or asphalt when it comes to supporting heavy loads. This can be a concern for driveways or pathways that experience frequent vehicle traffic, as the material may compact and deteriorate under pressure.
4. Dust and Erosion
One common issue with decomposed granite is the generation of dust particles, particularly in high-traffic areas or windy environments. This dust can be a nuisance, requiring regular watering or sealing to minimize airborne particles and prevent erosion of the surface.
5. Weed Growth
Due to its porous nature, decomposed granite can provide an ideal environment for weed seeds to germinate and take root. Without proper weed control measures, such as the use of landscaping fabric or herbicides, unwanted vegetation may quickly invade and detract from the aesthetic appeal of the area.
6. Limited Color Options
While decomposed granite is available in various natural hues, including shades of brown, gray, and gold, the color options are somewhat limited compared to other landscaping materials. This restriction may impact the overall design flexibility and coordination with existing outdoor elements.
7. Requires Periodic Replenishment
Over time, decomposed granite can break down and compact underfoot, losing its original texture and appearance. To maintain its desired look and functionality, regular replenishment of the material may be necessary, resulting in additional costs and labor.
8. Difficult to Control Drainage
Due to its permeable nature, decomposed granite can impact surface drainage patterns in certain landscapes. Without proper grading and drainage planning, water may pool or flow unpredictably over the DG surface, leading to potential flooding or soil erosion issues.
9. Sharp Edges Pose Risks
Sharp edges and uneven surfaces associated with decomposed granite can pose safety risks, especially in areas frequented by children or pets. Accidental falls or trips on the rough terrain may result in minor injuries or discomfort, necessitating caution and regular maintenance.
10. Susceptible to Fading
Exposure to sunlight and weather elements can cause decomposed granite to fade over time, altering its original color and vibrancy. To preserve the aesthetic appeal of the material, periodic application of sealants or UV protectants may be required, adding to the overall upkeep.
11. Initial Installation Challenges
Unlike more uniform paving materials, such as concrete or pavers, the installation of decomposed granite can be labor-intensive and time-consuming. Proper compaction, grading, and edging are essential to prevent shifting or settling of the material, requiring skilled professionals for optimal results.
12. Limited Use in Certain Settings
While decomposed granite is versatile and adaptable in many landscaping applications, its suitability for specific settings may be limited. Areas with high water tables, extreme temperature fluctuations, or heavy foot traffic may not be ideal candidates for DG installations, necessitating alternative materials for durability and longevity.
