Plan the perfect garden with our interactive tool →

What Is Decomposed Granite?

granite image by Andrzej Solnica from Fotolia.com

Natural stone is a popular option in many landscaping projects. The right color and type of stone can add to the appearance and value of a property, and stone tends to look more natural than concrete or brickwork options. Unfortunately, stone patio materials can be expensive and may decay over years. Decomposed granite is a simpler and less expensive option that still gives landscapes a natural stone look.

Definition

Decomposed granite begins as normal granite stone, often older stone found at quarries and other areas. Over time, wind, rain, cold and heat wear away at this granite until it breaks apart into smaller and smaller pieces, finally becoming gravel. This gravel is harvested and then either kept the same size or ground down to finer pieces as needed.

Uses

When constructing houses, some contractors use decomposed granite as a foundation fill. Landscapers place the granite in driveways, patios, or roads. Larger commercial venues may use granite gravel to fill riding arenas or horse stalls. Governments can use it to pave hiking and biking trails or playgrounds in public areas.

  • Decomposed granite begins as normal granite stone, often older stone found at quarries and other areas.
  • Larger commercial venues may use granite gravel to fill riding arenas or horse stalls.

Types

There are several types of decomposed granite, depending on what is mixed with it. Loose granite gravel is fine like sand. Another type of granite gravel is mixed with a light stabilizer to help keep the mixture more firmly in place. Some kinds of decomposed granite are even made with a resin that hardens and traps the granite in place, giving it either a rough or polished texture, depending on how the granite is used.

Benefits

Natural granite has several different shades available for homeowners, including gray, brown, tan and red. The material forms a compact surface that is not hard, yet still resists impact and provides comfortable resistance. Granite is also one of the more organic landscaping materials and will not wash away any synthetic materials or chemicals into the soil when it rains.

  • There are several types of decomposed granite, depending on what is mixed with it.
  • Some kinds of decomposed granite are even made with a resin that hardens and traps the granite in place, giving it either a rough or polished texture, depending on how the granite is used.

Considerations

Decomposed granite is not easy to install. Installers must use a professional compactor to beat the granite gravel down in place and make it solid enough to resist natural movement. Even then the granite is vulnerable to erosion from water sources, and logs or other barriers must be put into place so it does not eventually wash away.

Related Articles

Landscape Gravel Colors
Landscape Gravel Colors
Disadvantages to Landscaping With Volcanic Rock
Disadvantages to Landscaping With Volcanic Rock
Pea Gravel Colors
Pea Gravel Colors
Difference Between Lightweight & Heavyweight Concrete
Difference Between Lightweight & Heavyweight Concrete
How Thick Should an Asphalt Driveway Be?
How Thick Should an Asphalt Driveway Be?
What Is Yew Wood?
What Is Yew Wood?
Inexpensive Ways to Cover Dirt In a Driveway
Inexpensive Ways to Cover Dirt In a Driveway
How to Install a Crushed Rock Patio
How to Install a Crushed Rock Patio
How to Install Stone Steps
How to Install Stone Steps
Advantages and Disadvantages of Flagstones
Advantages and Disadvantages of Flagstones
What Is Ovangkol Wood?
What Is Ovangkol Wood?
How to Use Pavers As Stair Landing
How to Use Pavers As Stair Landing
How to Make Hypertufa Benches
How to Make Hypertufa Benches
How to Control Gully Erosion in Clay Soil
How to Control Gully Erosion in Clay Soil
Garden Guides
×