Boulder Walls

The base course of boulders should be buried a minimum of 1/3 the height of the boulder.

Compactable base material is not required under the boulder walls.

Boulders should be placed so that you avoid large gaps and they are all touching.

The base course of boulders should be set on the beginning edge of the "Dewitt" filter fabric.

It is very important to back-fill and firmly pack solid after each row of boulders.

Avoid using too small of boulders in the base or middle of the wall.

A set back of 3.5" for every 1" is optimum, (a 30% slope) for the front of the wall.

Using pallet forks for a bobcat works well for placing large boulders.

The top row of boulders should be reasonably level, but varied enough for a natural look.

Leave the finish grade a little high to account for settling.

The filter fabric should be run all the way up the back side of the wall.

To cut the excess fabric off the top, use a hand-help torch. Hold the fabric at the top and run the torch along the top course of boulders. This will leave a nice clean cut and save on blades.