Installation Steps for VERSA-LOK Mosette

Step 1 Determine Wall Layout
Prior to excavating, lay the first course of Mosette units in the desired configuration to help determine the path of your wall. Mark an area 6 inches out from all sides of the wall (approximately a 20-inch width). This is the area that will be excavated.

Step 2 Excavate Trench
Excavate the marked area to a depth of 7 inches. This depth will allow room for a 4-inch-high compacted granular leveling pad and a 3-inch embedment of the first course. If necessary, overexcavate soft foundation soil and replace it will properly compacted backfill. Use a hand tamper or vibratory plate compactor to compact the base of trench.

Step 3 Build Leveling Pad
Place granular leveling-pad material in the trench and compact it to a smooth, level surface until approximately 4 inches deep. Place and compact no more than 2-inch thicknesses at one time if using a vibratory-plate compactor. Leveling-pad material should consist of coarse-grained sand, gravel, or crushed stone. Aggregate used locally for road base usually is acceptable. You can spread a thin layer of sand on top (1/2 to 1 inch) to help with Mosette leveling.

Step 4 Place, Level and Backfill Base Course
Place the first (or "base") course of Mosette units on the leveling pad. As you proceed, level each unit front to back, side to side, and with adjacent units. You can adjust the sand layer or use a rubber mallet to help with unit leveling. Where a 12-inch-high vertical unit is placed next to 6-inch-high units in the base course, you may find it helpful to temporarily set additional 6-inch-high units for the next course so you can level across the vertical unit. After the first course of Mosette units is installed, backfill the open trench areas with desired soil and compact. Take care not to displace units during compaction.