Decomposed Granite Calculator
Calculate the amount of decomposed granite for your pathway, patio, or xeriscape project. Choose between loose DG or stabilized DG and get accurate tonnage and cost estimates.
Decomposed Granite Colors and Textures
DG comes in a range of natural earth tones including gold, tan, brown, gray, and reddish hues. The color depends on the parent granite and the minerals present. Gold and tan are the most popular for residential paths and patios. Gray DG blends well with contemporary landscapes. The texture ranges from fine sand to small 3/8-inch particles. Finer DG compacts more tightly, creating a smoother surface. Coarser DG drains better but feels less stable underfoot.
DG Installation Guide
Start by excavating the path area to a depth of 4 to 5 inches. Install edging along both sides to contain the material. Add 2 to 3 inches of compacted base rock (3/4-inch minus) and compact with a plate compactor. Spread DG in 1-inch lifts, misting each layer with water and compacting before adding the next. For stabilized DG, mix the binding agent with the granite according to the manufacturer's instructions before spreading. The finished surface should feel firm but not rock-hard, allowing water to permeate while supporting foot traffic.
Frequently Asked Questions
What is the difference between loose and stabilized DG?
Loose DG is natural granite that has weathered into sand-like particles. Stabilized DG has a resin binder mixed in that hardens the surface, reducing dust and erosion while remaining permeable.
How deep should decomposed granite be?
Loose DG paths need 2 to 3 inches over compacted base. Stabilized DG should be 2 to 3 inches thick and requires proper compaction during installation.
Does decomposed granite wash away?
Loose DG can erode on slopes and in heavy rain. Stabilized DG resists washout much better. For sloped areas, stabilized DG or adding a binding agent is recommended.