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Excavate trench 200 mm (8 inches) deep and 400 mm (16 inches wide). Place and compact gravel to 100 mm (4 inches) depth. |
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Bury the first course by placing only standard units on gravel base. Ensure units are level from front to back and from side to side. |
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Stack units along wall. Coping units can be used in the wall, but should not be stacked on other coping units without adhesive. |
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Place a line of adhesive in front of and behind the tongue on the second last course. Position coping stones on top. Fill with compacted soil to top of the wall. |