Decomposed Granite.....A Natural and Versatile Material

If you have never heard of decomposed granite before, here is a short explanation. The color of decomposed granite is reddish-brown. It begins in the form of granite rock and then decomposes into a smaller form or gravel. This form of gravel contains high levels of trace minerals. It can be made in many different sizes and is purely safe for the environment.

Decomposed granite can be used in different ways, even mixed with other substances. It is commonly used for sidewalks, gardens, pathways, patios, trails, playing fields, golf courses and any area where stone or aggregates can be used. You can also make decomposed granite driveways.

Decomposed granite is made of very small pieces of granite. The sizes can range from a maximum of 1/4" to a sandy consistency. It is a fairly fine mixture, as opposed to other materials.

DG can be used in a few different ways. How long it will last and the cost depends on which application is used for the project.

Decomposed granite can be used as singular material to create decks, driveways, and pathways. Decomposed granite can also be used in conjunction with other materials, such as flagstone, to economically create naturalistic hardscapes in your outdoor environment.

Decomposed Granite Selection

1.                 Choose decomposed granite for your project based on what you want the surface to look like. Decomposed granite selection ranges from ¼-inch pieces to pieces no bigger than grains of sand. The larger pieces can provide more surface texture to your pathway or drive where smaller pieces provide a smooth surface.

Pick the granite color best suited to your landscape and house colors. Just as granite counter tops come in a variety of colors, the small granite chips of decomposed granite come in similar color ranges. There are many shades of blues, greens, yellows and reds as well as natural stone colors. It is possible to use one color of decomposed granite for the main portion of the path and use a separate color as edging or accent.

You also need to decide how you plan to stabilize the decomposed granite. You can just pack the granite pieces tightly on the ground for a loose path or drive. Stabilizers are another option. These allow you to create a path that can last up to ten years and come already added to the granite. Adding resins to the decomposed granite allows you to set your driveway in place for up to fourteen years with a minimum of maintenance.

Decomposed Granite Preparation

2.                 Decomposed granite needs a solid bed to lie on. Preparation of the subsurface is important to the success of this project. Depending on whether this is a pathway or a driveway, you need to put down a bed of crushed rock. For a pathway, the rock needs to be at least four inches thick and a driveway needs a base at least six inches thick.

Before you lay the crushed rock, decide if you want the finished path or drive to be level with the ground's surface. If you do, you need to dig out enough dirt to allow that.

Put the crushed rock in place and wet it down. Run a compactor over the base to settle all the fine rocks into place and to provide a hard surface for the decomposed granite.

Decomposed Granite Installation

3.                 Place the decomposed granite over the crushed rock. Level it as much as you can by hand. Use a hose to water the decomposed granite down. This helps plain decomposed granite set up. The water activates the stabilizer or resin if you chose that type of application. Follow directions from your granite supplier for the proper amount of water to apply.

Once you can walk on the decomposed granite without sinking in or feeling muddy underfoot, use a roller to pack it down. Make several passes to ensure that the surface is smooth and has no marks from the roller.

Allow the decomposed granite to dry. Look for signs of chipping or cracking. You can repair problems with the addition of more water and decomposed granite. While the finished surface is solid, it's normal to hear the crunch of the rock in the sublayer.

      Contact me today for more information on how you can have a new decomposed granite deck, pathway or driveway in your landscape.

       Mark Taylor

       Cgreen Landscape and Irrigation

       We design, build and maintain your outdoor dreams.