Not all retaining walls are created equal.  Our retaining walls are built to last.  We begin by excavating  8-10 inches below the first course, and 3-4 feet behind the wall.  The area below the first course is filled in with Traffic Bond and compacted approximately every 2 inches until the desired height is met.  The area behind the wall contains drain gravel.  Depending on the type and size of the wall,

we use: perforated drain tile, geo grid, dead-men.....