The wash rock is a collection of cut rock, frequently called gravel, that is separated into different, but uniform sizes. The wash rock comes in a dark or light blue color.
Our sizes are:
#57: Rocks are 1 inch in size.
#67: Rocks are ¾ inch in size.
#78/Pea Gravel: Rocks are ⅜ inch in size. (The pea gravel is a cut rock, not a rounded rock).
How much is one cubic yard?
Coverage: One cubic yard of wash rock covers an area 9 x 12 three inches deep.
Weight: 1 cubic yard of wash rock weighs approximately 2,500 pounds. Most standard pick-up trucks (ex. F150) or single axle 5x8 trailer can hold 1 yard because of the weight.
#57: Rock in french drains
#67: Base layer for concrete pads. Top layer for gravel driveways.
#78/Pea gravel: Driveways, Walkways
#57: For french drains it is recommended to have at least 4 inches of clean rock on top of the drain pipe.
#67: When using as a base for concrete pads, it is recommended you use 2-4 inches of #67.
If you are using #67 as a top dressing for an existing driveway it is recommended that you use 1.5-2 inches of rock to provide coverage.
#78/ Pea Gravel: When using #78/ Pea gravel for a walkway or driveway, it is advised that you use 2-4 inches of depth to provide coverage. However, more than 4 inches is not recommended as it could cause difficulty walking or parking on.